21 CFR § 558.55 - Amprolium.

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§ 558.55 Amprolium.

(a)Approvals. Type A medicated articles: 25 percent to No. 016592 in § 510.600(c) of this chapter for use as in paragraph (d) of this section.

(b)Special considerations. Do not use in Type B or Type C medicated feeds containing bentonite.

(c)Related tolerances. See § 556.50 of this chapter.

(d)Conditions of use -

(1)Cattle. It is used as follows:

Amprolium in grams per ton Indications for use Limitations Sponsor
(i) 113.5 to 11, 350; to provide 5 milligrams per kilogram of body weight per day Calves: As an aid in the prevention of coccidiosis caused by Eimeria bovis and E. zuernii Top-dress on or mix in the daily ration. Feed for 21 days when experience indicates that coccidiosis is likely to be a hazard, as the sole source of amprolium. Withdraw 24 hours before slaughter. A withdrawal period has not been established for this product in preruminating calves. Do not use in calves to be processed for veal 016592
(ii) 113.5 to 11, 350; to provide 10 milligrams per kilogram of body weight per day Calves: As an aid in the treatment of coccidiosis caused by Eimeria bovis and E. zuernii Top-dress on or mix in the daily ration. Feed for 5 days as the sole source of amprolium. Withdraw 24 hours before slaughter. A withdrawal period has not been established for this product in preruminating calves. Do not use in calves to be processed for veal 016592

(2)Chickens. It is used as follows:

Amprolium in grams per ton Combination in grams per ton Indications for use Limitations Sponsor
(i) 36.3 to 113.5 Replacement chickens: For development of active immunity to coccidiosis Feed continuously until onset of production as follows: 016592
Growing conditions Up to 5 weeks of age From 5 to 8 weeks of age Over 8 weeks of age
Amprolium in grams per ton Amprolium in grams per ton Amprolium in grams per ton
Severe exposure to coccidiosis 113.5 72.6-113.5 36.3-113.5
(0.0125%) (0.008%-0.0125%) (0.004%-0.0125%)
Moderate exposure to coccidiosis 72.6-113.5 54.5-113.5 36.3-113.5
(0.008%-0.0125%) (0.006%-0.0125%) (0.004%-0.0125%)
Slight exposure to coccidiosis 36.3-113.5 36.3-113.5 36.3-113.5
(0.004%-0.0125%) (0.004%-0.0125%) (0.004%-0.0125%)
Amprolium in grams per ton Combination in grams per ton Indications for use Limitations Sponsor
(ii) 36.3 to 113.5 Bacitracin methylenedisalicylate 4 to 50 Replacement chickens: For development of active immunity to coccidiosis; and for increased rate of weight gain and improved feed efficiency Feed according to subtable in item (i). Bacitracin methylenedisalicylate as provided by No. 054771 in § 510.600(c) of this chapter 054771
(iii) 72.6 to 113.5 Broiler chickens: For prevention of coccidiosis caused by Eimeria tenella only Feed continuously as the sole ration; as sole source of amprolium 016592
(iv) 72.6 to 113.5 Bambermycins 1 to 2 Broiler chickens: For prevention of coccidiosis caused by Eimeria tenella only; and for increased rate of weight gain and improved feed efficiency Feed continuously as the sole ration; as sole source of amprolium. Bambermycins as provided by No. 016592 in § 510.600(c) of this chapter 016592
(v) 113.5 1. Laying chickens: For prevention of coccidiosis Feed continuously as the sole ration; as the sole source of amprolium 016592
2. Laying chickens: For treatment of coccidiosis in moderate outbreaks Feed for 2 weeks
(vi) 113.5 to 227 1. Replacement chickens: For prevention of coccidiosis where immunity to coccidiosis is not desired Feed continuously from day-old until onset of production; as the sole source of amprolium 016592
2. Broiler chickens: For prevention of coccidiosis where immunity to coccidiosis is not desired Feed continuously as the sole ration; as sole source of amprolium
(vii) 113.5 to 227 Bambermycins 1 to 2 Broiler chickens: For prevention of coccidiosis where immunity to coccidiosis is not desired; and for increased rate of weight gain and improved feed efficiency Feed continuously as the sole ration; as sole source of amprolium. Bambermycins as provided by No. 016592 in § 510.600(c) of this chapter 016592
(viii) 227 Laying chickens: For treatment of coccidiosis in severe outbreaks. Feed for 2 weeks 016592

(3)Turkeys. It is used as follows:

Amprolium in grams per ton Combination in grams per ton Indications for use Limitations Sponsor
(i) 113.5 Bambermycins 1 to 4 Growing turkeys: For prevention of coccidiosis; and for increased rate of weight gain and improved feed efficiency Feed continuously as the sole source of amprolium; bambermycins as provided by No. 016592 in § 510.600(c) of this chapter 016592
(ii) 113.5 to 227 Turkeys: For prevention of coccidiosis Feed continuously as the sole ration; as sole source of amprolium 016592

(4)Pheasants. It is used as follows:

Amprolium in grams per ton Combination in grams per ton Indications for use Limitations Sponsor
(i) 159 Growing pheasants: For the prevention of coccidiosis caused by Eimeria colchici, E. duodenalis, and E. phasiani Feed continuously as sole ration. Use as sole source of amprolium 016592
(ii) [Reserved]
[41 FR 10985, Mar. 15, 1976]
Editorial Note:
For Federal Register citations affecting § 558.55, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.