Code of Federal Regulations Title 21. Food and Drugs § 21.558.635 Virginiamycin

(i) 20

Broiler chickens: For prevention of necrotic enteritis caused by Clostridium perfringens susceptible to virginiamycin

Not for use in layers

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(ii) 20

Amprolium 72.6 to 113.5

Broiler chickens: For prevention of necrotic enteritis caused by Clostridium perfringens susceptible to virginiamycin; and for the prevention of coccidiosis caused by Eimeria tenella

For field conditions where only E. tenella is the major problem, feed continuously as the sole ration. Use as the sole source of amprolium. Do not use in feeds containing bentonite. Not for use in laying chickens. Amprolium as provided by No. 016592 in § 510.600(c) of this chapter

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(iii) 20

Amprolium 113.5 to 227

Broiler chickens: For prevention of necrotic enteritis caused by Clostridium perfringens susceptible to virginiamycin; and for the prevention of coccidiosis where immunity to coccidiosis is not desired

For most field conditions as they exist under modern management practices, feed 113.5 g/ton amprolium continuously. Where severe coccidiosis conditions exist, feed 227 g/ton. Use as the sole source of amprolium. Do not use in feeds containing bentonite. Not for use in laying chickens. Amprolium as provided by No. 016592 in § 510.600(c) of this chapter

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(iv) 20

Diclazuril, 0.91

Broiler chickens: For prevention of necrotic enteritis caused by Clostridium perfringens susceptible to virginiamycin; and for the prevention of coccidiosis caused by Eimeria tenella, E. necatrix, E. acervulina, E. brunetti, E. mitis (mivati), and E. maxima. Because diclazuril is effective against E. maxima late in its life cycle, subclinical intestinal lesions may be present for a short time after infection. Diclazuril was shown in studies to reduce lesions scores and improve performance and health of birds challenged with E. maxima

Feed continuously as the sole ration. Do not use in hens producing eggs for human food. Diclazuril as provided by No. 058198 in § 510.600(c) of this chapter

058198

(v) 20

Lasalocid 68 to 113

Broiler chickens: For prevention of necrotic enteritis caused by Clostridium perfringens susceptible to virginiamycin; and for the prevention of coccidiosis caused by Eimeria tenella, E. necatrix, E. acervulina, E. brunetti, E. mivati, and E. maxima

Feed continuously as the sole ration. Do not feed to laying chickens. For broiler or fryer chickens only. Lasalocid as provided by No. 054771 in § 510.600(c) of this chapter

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(vi) 20

Monensin 90 to 110

Broiler chickens: For prevention of necrotic enteritis caused by Clostridium perfringens susceptible to virginiamycin; and as an aid in the prevention of coccidiosis caused by Eimeria necatrix, E. tenella, E. acervulina, E. brunetti, E. maxima, and E. mivati

Feed continuously as the sole ration. Do not feed to laying chickens. See § 558.355(d) in this chapter. Monensin as provided by No. 058198 in § 510.600(c) of this chapter

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(vii) 20

Salinomycin 40 to 60

Broiler chickens: For prevention of necrotic enteritis caused by Clostridium perfringens susceptible to virginiamycin; and for the prevention of coccidiosis caused by Eimeria tenella, E. necatrix, E. acervulina, E. maxima, E. brunetti, and E. mivati

Feed continuously as the sole ration. Do not feed to chickens over 16 weeks of age. Do not feed to laying chickens. Not approved for use with pellet binders. May be fatal if accidentally fed to adult turkeys or horses. Salinomycin as provided by No. 016592 in § 510.600(c) of this chapter

(viii) 20

Semduramicin 22.7

Broiler chickens: For prevention of necrotic enteritis caused by Clostridium perfringens susceptible to virginiamycin; and for the prevention of coccidiosis caused by Eimeria acervulina, E. brunetti, E. maxima, E mivati/mitis, E. necatrix, and E. tenella

Feed continuously as the sole ration. Do not feed to laying hens. Semduramicin as provided by No. 066104 in § 510.600(c) of this chapter

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(ix) 20

Semduramicin (biomass) 22.7

Broiler chickens: For prevention of necrotic enteritis caused by Clostridium perfringens susceptible to virginiamycin; and for the prevention of coccidiosis caused by Eimeria acervulina, E. brunetti, E. maxima, E mivati/mitis, E. necatrix, and E. tenella

Feed continuously as the sole ration. Withdraw 1 day before slaughter. Do not feed to laying hens. Semduramicin as provided by No. 066104 in § 510.600(c) of this chapter

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(i) 25

Growing-finishing swine: As an aid in control of dysentery in swine up to 120 pounds in animals or on premises with a history of swine dysentery but where symptoms have not yet occurred

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(ii) 50 or 100

Growing-finishing swine: For treatment and control of swine dysentery in swine up to 120 pounds

Feed 100 grams per ton for 2 weeks, 50 grams per ton thereafter

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(iii) 100

Growing-finishing swine: For treatment of swine dysentery in nonbreeding swine over 120 pounds

Feed for 2 weeks

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(i) 13.5 to 16.0

Cattle fed in confinement for slaughter: For reduction of incidence of liver abscesses

Feed continuously as the sole ration to provide 85 to 240 milligrams per head per day. Not for use in animals intended for breeding

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(ii) [Reserved]