1. (a) Specifications. Type A medicated articles containing 2.4 or 8 grams hygromycin B per pound (g/lb).
2. (b) Sponsor. See No. 058198 in § 510.600(c) of this chapter for as follows:
3. (c) Related tolerances. See § 556.330 of this chapter.

4. (d) Special considerations.

   1. (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. (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.

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

   1. (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. (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]