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]