(a) Specifications. Type A medicated article containing 25 percent amprolium.
(b) Sponsor. No. 016592 in § 510.600(c) of this chapter.
(c) Related tolerances. See § 556.50 of this chapter.
(d) Special considerations. Do not use in Type B or Type C medicated feeds containing bentonite.
(e) 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] | | | | |
(5) Permitted combinations. Amprolium may also be used in combination with:
(i) Virginiamycin as in § 558.635.
(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.