CFR - Code of Federal Regulations Title 21

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For the most up-to-date version of CFR Title 21, go to the Electronic Code of Federal Regulations (eCFR).

[Code of Federal Regulations]

[Title 21, Volume 6]

[CITE: 21CFR558.274]

TITLE 21--FOOD AND DRUGS

CHAPTER I--FOOD AND DRUG ADMINISTRATION
DEPARTMENT OF HEALTH AND HUMAN SERVICES

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. 558.274 Hygromycin B.

(a) Specifications. Type A medicated articles containing 2.4 or 8 grams hygromycin B per pound (g/lb).

(b) Sponsor. See No. 058198 in § 510.600(c) of this chapter for as follows:

(c) Related tolerances. See § 556.330 of this chapter.

(d) Special considerations. (1) Federal law restricts medicated feed containing this veterinary feed directive (VFD) drug to use by or on the order of a licensed veterinarian. See § 558.6 for additional requirements.

(2) The expiration date of VFDs for hygromycin B medicated feeds must not exceed 6 months from the date of issuance. VFDs for hygromycin B shall not be refilled.

(e) Conditions of use. It is used in feed as follows:

(1) Chickens -

Hygromycin B grams/ton	Combination in grams/ton	Indications for use	Limitations	Sponsor
(i) 8 to 12		Chickens: For control of infections of large roundworms (Ascaris galli), cecal worms (Heterakis gallinae), and capillary worms (Capillaria obsignata)	Use in complete feed. Withdraw 3 days before slaughter	058198
(ii) [Reserved]

(2) Swine -

Hygromycin B grams/ton	Combination in grams/ton	Indications for use	Limitations	Sponsor
(i) 12		Swine: For control of infections of large roundworms (A. suis), nodular worms (O. dentatum), and whipworms (Trichuris suis)	In market hogs, use in complete feed for 8 weeks during the growing period. Withdraw 15 days before slaughter	058198
(ii) [Reserved]

[81 FR 95005, Dec. 27, 2016]