#### § 558.175 Clopidol.

(a) *Specifications.* Type A medicated article containing 25 percent clopidol.

(b) *Sponsor.* See No. 016592 in [§ 510.600(c) of this chapter](/on/2024-09-17/title-21/section-510.600#p-510.600(c)).

(c) *Related tolerances.* See [§ 556.160 of this chapter](/on/2024-09-17/title-21/section-556.160).

(d) *Conditions of use* —

(1) *Chickens* —

| Clopidol in grams per ton | Combination in grams per ton | Indications for use | Limitations | Sponsors |
| --- | --- | --- | --- | --- |
| (i) 113.5 | | Broiler chickens and re-placement chickens intended for use as caged layers: As an aid in the prevention of coccidiosis caused by *Eimeria tenella, E. necatrix, E. acervulina, E. maxima, E. brunetti,* and *E. mivati.* | Do not feed to chickens over 16 weeks of age | 016592 |
| (ii) 113.5 | Bacitracin methylenedisalicylate, 4 to 50 | Broiler chickens: As an aid in the prevention of coccidiosis caused by *Eimeria tenella, E. necatrix, E. acervulina, E. maxima, E. brunetti,* and *E. mivati,* and for increased rate of weight gain. | Feed continuously as the sole ration from the time chicks are placed in floor pens until slaughter. Do not feed to chickens over 16 weeks of age; bacitracin methylenedisalicylate as provided by No. 054771 in [§ 510.600(c) of this chapter](/on/2024-09-17/title-21/section-510.600#p-510.600(c)) | 016592 |
| (iii) 113.5 | Bacitracin zinc, 5 to 25 | Broiler chickens: As an aid in the prevention of coccidiosis caused by *Eimeria tenella, E. necatrix, E. acervulina, E. maxima, E. brunetti,* and *E. mivati,* and for increased rate of weight gain and improved feed efficiency. | Feed continuously as sole ration; bacitracin zinc as provided by No. 054771 in [§ 510.600(c) of this chapter](/on/2024-09-17/title-21/section-510.600#p-510.600(c)) | 054771 016592 |
| (iv) 113.5 | Bambermycins, 1 to 2 | Broiler chickens: As an aid in prevention of coccidiosis caused by *Eimeria tenella, E. necatrix, E. acervulina, E. maxima, E. brunetti,* and *E. mivati;* and for increased rate of weight gain and improved feed efficiency. | Feed continuously as the sole ration. Do not feed to chickens over 16 weeks of age | 016592 |
| (v) 227 | | Broiler and replacement chickens intended for use as caged layers: As an aid in 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; feed up to 16 weeks of age if intended for use as caged layers; withdraw 5 days before slaughter if given at the level of 0.025 percent in feed or reduce level to 0.0125 percent 5 days before slaughter | 016592 |
| (vi) 227 | Bambermycins, 1 to 2 | Broiler chickens: As an aid in prevention of coccidiosis caused by *Eimeria tenella, E. necatrix, E. acervulina, E. maxima, E. brunetti,* and *E. mivati;* and for increased rate of weight gain and improved feed efficiency. | Feed continuously as sole ration until 5 days before slaughter. Withdraw 5 days before slaughter or feed 113.5 g/ton clopidol and 1 to 2 g/ton bambermycins during those 5 days before slaughter. Do not feed to chickens over 16 weeks of age | 016592 |

(2) *Turkeys* —

| Clopidol in grams per ton | Combination in grams per ton | Indications for use | Limitations | Sponsors |
| --- | --- | --- | --- | --- |
| (i) 113.5 or 227 | | Turkeys: As an aid in the prevention of leucocytozoonosis caused by *Leucocytozoon smithi.* | For turkeys grown for meat purposes only; feed continuously as the sole ration at 0.0125 or 0.025 percent clopidol depending on management practices, degree of exposure, and amount of feed eaten; withdraw 5 days before slaughter | 016592 |
| (ii) [Reserved] | | | | |

(3) *Combinations.* Clopidol may also be used in combination with:

(i) Chlortetracycline as in [§ 558.128](/on/2024-09-17/title-21/section-558.128).

(ii) Lincomycin as in [§ 558.325](/on/2024-09-17/title-21/section-558.325).

[[68 FR 17882](https://www.federalregister.gov/citation/68-FR-17882), Apr. 14, 2003, as amended at [72 FR 60551](https://www.federalregister.gov/citation/72-FR-60551), Oct. 25, 2007; [74 FR 61028](https://www.federalregister.gov/citation/74-FR-61028), Nov. 23, 2009; [79 FR 10965](https://www.federalregister.gov/citation/79-FR-10965), [10982](https://www.federalregister.gov/citation/79-FR-10982), Feb. 27, 2014; [79 FR 13545](https://www.federalregister.gov/citation/79-FR-13545), Mar. 11, 2014; [81 FR 17609](https://www.federalregister.gov/citation/81-FR-17609), Mar. 30, 2016; [81 FR 95004](https://www.federalregister.gov/citation/81-FR-95004), Dec. 27, 2016; [84 FR 12495](https://www.federalregister.gov/citation/84-FR-12495), Apr. 2, 2019; [86 FR 14822](https://www.federalregister.gov/citation/86-FR-14822), Mar. 19, 2021]