[Title 21 CFR 558.58]
[Code of Federal Regulations (annual edition) - April 1, 1996 Edition]
[Title 21 - FOOD AND DRUGS]
[Chapter I - FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES--(Continued)]
[Subchapter E - ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS]
[Part 558 - NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS]
[Subpart B - Specific New Animal Drugs for Use in Animal Feeds]
[Sec. 558.58 - Amprolium and ethopabate.]
[From the U.S. Government Publishing Office]




  21
  FOOD AND DRUGS
  6
  1996-04-01
  1996-04-01
  false
  Amprolium and ethopabate.
  558.58
  Sec. 558.58
  
    FOOD AND DRUGS
    FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES--(Continued)
    ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS
    NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS
    Specific New Animal Drugs for Use in Animal Feeds
  


Sec. 558.58   Amprolium and ethopabate.

    (a) Approvals. Type A medicated articles: (1) 25 percent amprolium 
and 0.8 percent ethopabate; 25 percent amprolium and 8 percent 
ethopabate; 5 percent amprolium and 0.16 percent ethopabate; 5 percent 
amprolium and 1.6 percent ethopabate; to 000006.
    (2) 0.15 percent amprolium and 0.004 percent ethopabate and 0.05 
gram per pound bacitracin (as bacitracin methylene disalicylate) to 
047019 in Sec. 510.600(c) of this chapter.
    (b) Special considerations. Do not use in Type B or Type C medicated 
feeds containing bentonite.
    (c) Related tolerances. See Secs. 556.50 and 556.260 of this 
chapter.
    (d) Conditions of use. (1) It is used for chickens as follows:

----------------------------------------------------------------------------------------------------------------
 Amprolium and ethopabate in    Combination in grams                                                            
        grams per ton                 per ton            Indications for use         Limitations        Sponsor 
----------------------------------------------------------------------------------------------------------------
(i) Amprolium 113.5 (0.0125   .......................  Broiler chickens as an  Not for laying hens;             
 pct) and ethopabate 3.6                                aid in the prevention   as sole source of               
 (0.0004 pct).                                          of coccidiosis.         amprolium.                      
(ii) Amprolium 113.5          Bambermycins 2 to 3      Broiler chickens; as    Feed continuously as             
 (0.0125%) and ethopabate      plus roxarsone 22.8 to   an aid in the           the sole ration; as             
 3.6 (0.0004%).                34.1 (0.0025% to         prevention of           sole source of                  
                               0.00375%).               coccidiosis; for        amprolium and organic           
                                                        increased rate of       arsenic; amprolium              
                                                        weight gain, improved   and ethopabate as               
                                                        feed efficiency, and    provided by No.                 
                                                        pigmentation.           000006 in Sec.                  
                                                                                510.600(c) of this              
                                                                                chapter, roxarsone by           
                                                                                No. 046573,                     
                                                                                bambermycins by No.             
                                                                                012799; withdraw 5 d            
                                                                                before slaughter.               
                              Lincomycin 2 to 4......  Broiler chickens; for   Not for laying                   
                                                        increase in rate of     chickens; as                    
                                                        weight gain; improved   lincomycin                      
                                                        feed efficiency; as     hydrochloride                   
                                                        an aid in the           monohydrate; as sole            
                                                        prevention of           source of amprolium.            
                                                        coccidiosis.                                            
                              Lincomycin 2 to 4 plus   Broiler chickens; for   Not for laying                   
                               roxarsone 45.4           increase in rate of     chickens; as                    
                               (0.005%).                weight gain; improved   lincomycin                      
                                                        feed efficiency and     hydrochloride                   
                                                        pigmentation; as an     monohydrate; withdraw           
                                                        aid in the prevention   5 d before slaughter;           
                                                        of coccidiosis.         as sole source of               
                                                                                amprolium and organic           
                                                                                arsenic.                        

[[Page 391]]

                                                                                                                
                              Roxarsone 45.4 (0.005    Broiler chickens; to    Do not feed to laying            
                               pct).                    aid in prevention of    chickens; withdraw 5            
                                                        coccidiosis where       d before slaughter;             
                                                        severe exposure to      as sole source of               
                                                        coccidiosis from        amprolium; do not use           
                                                        Eimeria acervulina,     as a treatment for              
                                                        E. maxima, and E.       outbreaks of                    
                                                        brunetti is likely to   coccidiosis; feed as            
                                                        occur; for increased    sole ration from time           
                                                        rate of weight gain     chickens are placed             
                                                        in broiler chickens     on litter until the             
                                                        raised in floor pens.   past the time when              
                                                                                coccidiosis is                  
                                                                                ordinarily a hazard;            
                                                                                roxarsone as provided           
                                                                                by No. 046573 in Sec.           
                                                                                 510.600(c) of this             
                                                                                chapter; combinations           
                                                                                as provided by No.              
                                                                                000006.                         
(iii) Amprolium 113.5         .......................  Broiler chickens and    Not for chickens over            
 (0.0125%) and ethopabate                               replacement chickens    16 weeks of age.                
 36.3 (0.004%).                                         where immunity to                                       
                                                        coccidiosis is not                                      
                                                        desired; as an aid in                                   
                                                        the prevention of                                       
                                                        coccidiosis where                                       
                                                        severe exposure to                                      
                                                        coccidiosis from                                        
                                                        Eimeria acervulina,                                     
                                                        E. maxima, and E.                                       
                                                        brunetti is likely to                                   
                                                        occur.                                                  
                              Arsanilic acid 90 (0.01  Broiler chickens and    Not for laying hens;             
                               pct) plus erythromycin   replacement chickens    withdraw 5 d before             
                               4.6 to 18.5.             where immunity to       slaughter; as sole              
                                                        coccidiosis is not      source of organic               
                                                        desired; prevention     arsenic; as                     
                                                        of coccidiosis;         erythromycin                    
                                                        growth promotion and    thiocyanate.                    
                                                        feed efficiency;                                        
                                                        improve pigmentation.                                   
                              Bacitracin 4 to 50.....  1. Broiler chickens     Not for chickens over            
                                                        and replacement         16 weeks of age; do             
                                                        chickens where          not feed to laying              
                                                        immunity to             chickens; as sole               
                                                        coccidiosis is not      source of amprolium;            
                                                        desired; to aid in      not for use as a                
                                                        prevention of           treatment for                   
                                                        coccidiosis where       outbreaks of                    
                                                        severe exposure to      coccidiosis; as                 
                                                        coccidiosis from        bacitracin methylene            
                                                        Eimeria acervulina,     disalicylate as                 
                                                        E. maxima, and E.       provided by No.                 
                                                        brunetti is likely to   046573 or bacitracin            
                                                        occur; for increased    zinc as provided by             
                                                        rate of weight gain     No. 010042 in Sec.              
                                                        in broiler chickens     510.600(c) of this              
                                                        raised in floor pens.   chapter; feed as the            
                                                                                sole ration from the            
                                                                                time chickens are               
                                                                                placed on litter                
                                                                                until past the time             
                                                                                when coccidiosis is             
                                                                                ordinarily a hazard;            
                                                                                combination as                  
                                                                                provided by No.                 
                                                                                000006 in Sec.                  
                                                                                510.600(c) of this              
                                                                                chapter.                        
                              .......................  2. Broiler chickens;    Not for chickens over      010042
                                                        as an aid in            16 weeks of age; do             
                                                        prevention of           not feed to laying              
                                                        coccidiosis where       chickens; as sole               
                                                        severe exposure to      source of amprolium;            
                                                        coccidiosis from        not for use as a                
                                                        Eimeria acervulina,     treatment for                   
                                                        E. maxima, and E.       coccidiosis;                    
                                                        brunetti is likely to   bacitracin zinc as              
                                                        occur; improved feed    provided by No.                 
                                                        efficiency.             010042 in Sec.                  
                                                                                510.600(c) of this              
                                                                                chapter; feed as the            
                                                                                sole ration from the            
                                                                                time chickens are               
                                                                                placed on litter                
                                                                                until market weight;            
                                                                                combination as                  
                                                                                provided by No.                 
                                                                                010042.                         

[[Page 392]]

                                                                                                                
                              Bacitracin 5 to 35 plus  Broiler chickens; for   Do not feed to laying            
                               roxarsone 34             increased rate of       chickens; withdraw 5            
                               (0.00375%).              weight gain and as an   d before slaughter;             
                                                        aid in the prevention   as sole source of               
                                                        of coccidiosis where    amprolium and organic           
                                                        severe exposure to      arsenic; do not use             
                                                        coccidiosis from        as a treatment for              
                                                        Eimeria acervulina,     outbreaks of                    
                                                        E. maxima, and E.       coccidiosis; feed as            
                                                        brunetti is likely to   the sole ration from            
                                                        occur in broiler        time chickens are               
                                                        chickens raised in      placed on litter                
                                                        floor pens.             until past the time             
                                                                                when coccidiosis is             
                                                                                ordinarily a hazard;            
                                                                                amprolium and                   
                                                                                ethopabate as                   
                                                                                provided by No.                 
                                                                                000006 in Sec.                  
                                                                                510.600(c) of this              
                                                                                chapter; bacitracin             
                                                                                methylene                       
                                                                                disalicylate as                 
                                                                                provided by No.                 
                                                                                046573 or bacitracin            
                                                                                zinc as provided by             
                                                                                No. 010042 in Sec.              
                                                                                510.600(c) of this              
                                                                                chapter; roxarsone as           
                                                                                provided by No.                 
                                                                                046573 in Sec.                  
                                                                                510.600(c) of this              
                                                                                chapter; combination            
                                                                                as provided by No.              
                                                                                000006 in Sec.                  
                                                                                510.600(c) of this              
                                                                                chapter.                        
                              Bacitracin 20 to 35      Broiler chickens; for   Do not feed to laying            
                               plus roxarsone 34        increased rate of       chickens; withdraw 5            
                               (0.00375%).              weight gain, improved   d before slaughter;             
                                                        feed efficiency, and    as sole source of               
                                                        as an aid in the        amprolium and organic           
                                                        prevention of           arsenic; do not use             
                                                        coccidiosis where       as a treatment for              
                                                        severe exposure to      outbreaks of                    
                                                        coccidiosis from        coccidiosis; feed as            
                                                        Eimeria acervulina,     the sole ration from            
                                                        E. maxima, and E.       time chickens are               
                                                        brunetti is likely to   placed on litter                
                                                        occur in broiler        until past the time             
                                                        chickens raised in      when coccidiosis is             
                                                        floor pens.             ordinarily a hazard;            
                                                                                amprolium and                   
                                                                                ethopabate as                   
                                                                                provided by No.                 
                                                                                000006 in Sec.                  
                                                                                510.600(c) of this              
                                                                                chapter; bacitracin             
                                                                                methylene                       
                                                                                disalicylate as                 
                                                                                provided by No.                 
                                                                                046573 in Sec.                  
                                                                                510.600(c) of this              
                                                                                chapter; roxarsone as           
                                                                                provided by No.                 
                                                                                046573 in Sec.                  
                                                                                510.600(c) of this              
                                                                                chapter; combination            
                                                                                as provided by No.              
                                                                                000006 in Sec.                  
                                                                                510.600(c) of this              
                                                                                chapter.                        
                              Bacitracin 10 to 50      Broiler chickens; as    Do not feed to laying      010042
                               plus roxarsone 15.4 to   an aid in prevention    chickens; withdraw 5            
                               45.4 (0.0017% to         of coccidiosis where    d before slaughter;             
                               0.005%).                 severe exposure to      as sole source of               
                                                        coccidiosis from        amprolium and organic           
                                                        Eimeria acervulina,     arsenic; do not use             
                                                        E. maxima, and E.       as a treatment for              
                                                        brunetti is likely to   outbreaks of                    
                                                        occur; improved feed    coccidiosis; feed as            
                                                        efficiency.             the sole ration from            
                                                                                time chicks are                 
                                                                                placed on litter                
                                                                                until past the time             
                                                                                when coccidiosis is             
                                                                                ordinarily a hazard;            
                                                                                amprolium and                   
                                                                                ethopabate as                   
                                                                                provided by No.                 
                                                                                000006 in Sec.                  
                                                                                510.600(c) of this              
                                                                                chapter; bacitracin             
                                                                                zinc as provided by             
                                                                                No. 010042 roxarsone            
                                                                                as provided by No.              
                                                                                046573 combination as           
                                                                                provided by No.                 
                                                                                010042.                         
                              Bacitracin 10 plus       Broiler chickens; as    ......do..............     010042
                               roxarsone 30 to 45.4     an aid in prevention                                    
                               (0.0033% to 0.005%).     of coccidiosis where                                    
                                                        severe exposure to                                      
                                                        coccidiosis from E.                                     
                                                        acervulina, E.                                          
                                                        maxima, and E.                                          
                                                        brunetti is likely to                                   
                                                        occur; improved feed                                    
                                                        efficiency and                                          
                                                        improved pigmentation.                                  

[[Page 393]]

                                                                                                                
                              Bambermycins 1 to 3....  Broiler chickens; as    Feed continuously as             
                                                        an aid in the           the sole ration; as             
                                                        prevention of           sole source of                  
                                                        coccidiosis where       amprolium; amprolium,           
                                                        severe exposure to      ethopabate as                   
                                                        coccidiosis from        provided by No.                 
                                                        Eimeria acervulina,     000006 in Sec.                  
                                                        E. maxima, and E.       510.600(c) of this              
                                                        brunetti is likely to   chapter, bambermycins           
                                                        occur; for increased    as provided by No.              
                                                        rate of weight gain,    012799 in Sec.                  
                                                        and improved feed       510.600(c) of this              
                                                        efficiency.             chapter.                        
                              Bambermycins 1 to 3      Broiler chickens; as    Feed continuously as             
                               plus roxarsone 22.8 to   an aid in the           the sole ration; as             
                               34.1 (0.0025% to         prevention of           sole source of                  
                               0.00375%).               coccidiosis where       amprolium and organic           
                                                        severe exposure to      arsenic; amprolium              
                                                        coccidiosis from        and ethopabate as               
                                                        Eimeria acervulina,     provided by No.                 
                                                        E. maxima, and E.       000006 in Sec.                  
                                                        brunetti is likely to   510.600(c) of this              
                                                        occur; for increased    chapter, roxarsone by           
                                                        rate of weight gain;    No. 046573                      
                                                        improved feed           bambermycins by No.             
                                                        efficiency, and         012799. Withdraw 5              
                                                        improved pigmentation.  days before slaughter.          
                              Erythromycin 4.6 to      Broiler chickens and    Not for laying hens;             
                               18.5.                    replacement chickens    withdraw 24 hours               
                                                        where immunity to       before slaughter;               
                                                        coccidiosis is not      erythromycin                    
                                                        desired; prevention     thiocyanate.                    
                                                        of coccidiosis;                                         
                                                        growth promotion and                                    
                                                        feed efficiency.                                        
                              Virginiamycin, 15......  Broiler chickens, as    Feed continuously as       000069
                                                        an aid in the           sole ration, do not             
                                                        prevention of           feed to laying hens,            
                                                        coccidiosis where       not for chickens over           
                                                        severe exposure to      16 weeks of age, as             
                                                        Eimeria acervulina,     sole source of                  
                                                        E. brunetti, and E.     amprolium, amprolium            
                                                        maxima is likely to     and ethopabate as               
                                                        occur, for increased    provided by 000006 in           
                                                        rate of weight gain     Sec.  510.600(c),               
                                                        and improved feed       virginiamycin as                
                                                        efficiency.             provided by 000069.             
                              Virginiamycin, 5 to 15.  Broiler chickens, as    ......do..............           
                                                        an aid in the                                           
                                                        prevention of                                           
                                                        coccidiosis where                                       
                                                        severe exposure to                                      
                                                        Eimeria acervulina,                                     
                                                        E. brunetti, and E.                                     
                                                        maxima is likely to                                     
                                                        occur, for increased                                    
                                                        rate of weight gain.                                    
(iv) Amprolium 113.5 to 227   .......................  For broiler chickens    Not for laying hens...           
 (0.0125% to 0.025%) and                                and replacement                                         
 ethopabate 3.6 (0.0004%).                              chickens where                                          
                                                        immunity to                                             
                                                        coccidiosis is not                                      
                                                        desired; prevention                                     
                                                        of coccidiosis.                                         
                              Arsanilic acid 90        Broiler chickens and    As sole source of                
                               (0.01%).                 replacement chickens    organic arsenic;                
                                                        where immunity to       withdraw 5 d before             
                                                        coccidiosis is not      slaughter; not for              
                                                        desired; prevention     laying hens.                    
                                                        of coccidiosis;                                         
                                                        growth promotion and                                    
                                                        feed efficiency;                                        
                                                        improving                                               
                                                        pigmentation.                                           
                              Arsanilic acid 90        1. For broiler          Feed for 2 d before              
                               (0.01%) plus             chickens and            stress and 3 to 6 d             
                               erythromycin 92.5.       replacement chickens    after stress;                   
                                                        where immunity to       withdraw 5 d before             
                                                        coccidiosis is not      slaughter; as sole              
                                                        desired; prevention     source of organic               
                                                        of coccidiosis; as an   arsenic; not for                
                                                        aid in the prevention   laying hens.                    
                                                        of chronic                                              
                                                        respiratory disease                                     
                                                        during periods of                                       
                                                        stress; growth                                          
                                                        promotion and feed                                      
                                                        efficiency; improving                                   
                                                        pigmentation.                                           
                                                       2. For broiler          Feed for 7 to 14 d;              
                                                        chickens and            withdraw 5 d before             
                                                        replacement chickens    slaughter; as sole              
                                                        where immunity to       source of organic               
                                                        coccidiosis is not      arsenic; not for                
                                                        desired; prevention     laying hens.                    
                                                        of coccidiosis; as an                                   
                                                        aid in the prevention                                   
                                                        of infectious coryza;                                   
                                                        growth promotion and                                    
                                                        feed efficiency;                                        
                                                        improving                                               
                                                        pigmentation.                                           

[[Page 394]]

                                                                                                                
                              Arsanilic acid 90        For broiler chickens    Feed for 5 to 8 d; do            
                               (0.01%) plus             and replacement         not use in birds                
                               erythromycin 185.        chickens where          producing eggs for              
                                                        immunity to             food purposes;                  
                                                        coccidiosis is not      withdraw 5 d before             
                                                        desired; prevention     slaughter; as sole              
                                                        of coccidiosis; as an   source of organic               
                                                        aid in the prevention   arsenic.                        
                                                        and reduction of                                        
                                                        lesions and in                                          
                                                        lowering severity of                                    
                                                        chronic respiratory                                     
                                                        disease; growth                                         
                                                        promotion and feed                                      
                                                        efficiency; improving                                   
                                                        pigmentation.                                           
                              Bacitracin 4 to 50.....  For broiler chickens    As bacitracin                    
                                                        and replacement         methylene                       
                                                        chickens where          disalicylate; not for           
                                                        immunity to             laying hens.                    
                                                        coccidiosis is not                                      
                                                        desired; prevention                                     
                                                        of coccidiosis;                                         
                                                        growth promotion and                                    
                                                        feed efficiency.                                        
                              Bacitracin 100 to 200..  1. Broiler chickens     ......do..............           
                                                        and replacement                                         
                                                        chickens where                                          
                                                        immunity to                                             
                                                        coccidiosis is not                                      
                                                        desired; prevention                                     
                                                        of coccidiosis;                                         
                                                        treatment of chronic                                    
                                                        respiratory disease                                     
                                                        (air-sac infection)                                     
                                                        and blue comb                                           
                                                        (nonspecific                                            
                                                        infectious enteritis).                                  
                                                       2. For broiler          As zinc bacitracin,              
                                                        chickens and            not for laying hens.            
                                                        replacement chickens                                    
                                                        where immunity to                                       
                                                        coccidiosis is not                                      
                                                        desired; prevention                                     
                                                        of coccidiosis;                                         
                                                        treatment of chronic                                    
                                                        respiratory disease                                     
                                                        (air-sac infection),                                    
                                                        blue comb                                               
                                                        (nonspecific                                            
                                                        infectious enteritis).                                  
                              Bacitracin 4 to 50 plus  Broiler chickens and    As bacitracin                    
                               roxarsone 22.7 to 45.4   replacement chickens    methylene                       
                               (0.0025% to 0.005%).     where immunity to       disalicylate; not for           
                                                        coccidiosis is not      laying hens; as sole            
                                                        desired; prevention     source of organic               
                                                        of coccidiosis;         arsenic; withdraw 5 d           
                                                        growth promotion and    before slaughter.               
                                                        feed efficiency;                                        
                                                        improving                                               
                                                        pigmentation.                                           
                              Chlortetracycline 100    For broiler chickens    Not for laying hens;             
                               to 200.                  and for replacement     as chlortetracycline            
                                                        chickens where          hydrochloride.                  
                                                        immunity to                                             
                                                        coccidiosis is not                                      
                                                        desired; prevention                                     
                                                        of coccidiosis;                                         
                                                        treatment of chronic                                    
                                                        respiratory disease                                     
                                                        (air-sac infection),                                    
                                                        blue comb                                               
                                                        (nonspecific                                            
                                                        infectious                                              
                                                        enteritis);                                             
                                                        prevention of                                           
                                                        synovitis.                                              
                              Chlortetracycline 200..  Broiler chickens and    In low calcium feed              
                                                        replacement chickens    containing 0.8%                 
                                                        where immunity to       dietary calcium and             
                                                        coccidiosis is not      1.5% sodium sulfate;            
                                                        desired; prevention     feed continuously as            
                                                        of coccidiosis;         sole ration for not             
                                                        treatment of chronic    more than the 1st 3             
                                                        respiratory disease     weeks of life; not              
                                                        caused by strains of    for laying hens.                
                                                        Mycoplasma                                              
                                                        gallisepticum                                           
                                                        susceptible to                                          
                                                        chlortetracycline.                                      
                              Erythromycin 92.5......  1. For broiler          Feed for 2 d before              
                                                        chickens and for        stress and 3 to 6 d             
                                                        replacement chickens    after stress;                   
                                                        where immunity to       withdraw 24 h before            
                                                        coccidiosis is not      slaughter; not for              
                                                        desired; prevention     laying hens.                    
                                                        of coccidiosis; as an                                   
                                                        aid in the prevention                                   
                                                        of chronic                                              
                                                        respiratory disease                                     
                                                        during periods of                                       
                                                        stress.                                                 
                                                       2. For broiler          Feed for 7 to 14 d;              
                                                        chickens and            withdraw 24 h before            
                                                        replacement chickens    slaughter; not for              
                                                        where immunity to       laying hens.                    
                                                        coccidiosis is not                                      
                                                        desired; prevention                                     
                                                        of coccidiosis; as an                                   
                                                        aid in the prevention                                   
                                                        of infectious coryza.                                   

[[Page 395]]

                                                                                                                
                              Erythromycin 185.......  For broiler chickens    Feed for 5 to 8 d; do            
                                                        and replacement         not use in birds                
                                                        chickens where          producing eggs for              
                                                        immunity to             food purposes;                  
                                                        coccidiosis is not      withdraw 48 h before            
                                                        desired; prevention     slaughter.                      
                                                        of coccidiosis; as an                                   
                                                        aid in the prevention                                   
                                                        and reduction of                                        
                                                        lesions and in                                          
                                                        lowering severity of                                    
                                                        chronic respiratory                                     
                                                        disease.                                                
                              Penicillin 2.4 to 50...  For broiler chickens    Not for laying hens;             
                                                        and replacement         as procaine                     
                                                        chickens where          penicillin.                     
                                                        immunity to                                             
                                                        coccidiosis is not                                      
                                                        desired; prevention                                     
                                                        of coccidiosis;                                         
                                                        growth promotion and                                    
                                                        feed efficiency;                                        
                                                        improving                                               
                                                        pigmentation.                                           
                              Roxarsone 22.7 to 45.4   Broiler chickens and    As sole source of                
                               (0.0025% to 0.005%).     replacement chickens    organic arsenic;                
                                                        where immunity to       withdraw 5 d before             
                                                        coccidiosis is not      slaughter; not for              
                                                        desired; prevention     laying hens.                    
                                                        of coccidiosis;                                         
                                                        growth promotion and                                    
                                                        feed efficiency;                                        
                                                        improving                                               
                                                        pigmentation.                                           
(v) Amprolium 136.2 (0.015%)  Bacitracin 10..........  Broiler chickens; as    Feed as sole ration;       047019
 and ethopabate 3.6                                     an aid in the           use as sole source of           
 (0.0004%).                                             prevention of           amprolium; do not               
                                                        coccidiosis; growth     feed to laying hens;            
                                                        promotion and feed      as bacitracin                   
                                                        efficiency.             methylene                       
                                                                                disalicylate.                   
----------------------------------------------------------------------------------------------------------------

[41 FR 10990, Mar. 15, 1976]

    Editorial Note: For Federal Register citations affecting 
Sec. 558.58, see the List of CFR Sections Affected in the Finding Aids 
section of this volume.