Section 520.1263b - Lincomycin powder(a)Specifications. Each gram of soluble powder contains lincomycin hydrochloride equivalent to 0.4 grams of lincomycin.(b)Sponsors. See sponsor numbers in § 510.600(c) of this chapter as follows: (1) Nos. 054771 and 061133 for use as in paragraph (d) of this section.(2) Nos. 016592 and 076475 for use as in paragraphs (d)(1) and (2) of this section.(c)Tolerances. See § 556.360 of this chapter.(d)Conditions of use - (1)Swine - (i)Amount. 250 milligrams per gallon of drinking water to provide 3.8 milligrams per pound of body weight per day.(ii)Indications for use. For the treatment of swine dysentery (bloody scours).(iii)Limitations. Discard medicated drinking water if not used within 2 days. Prepare fresh stock solution daily. Do not use for more than 10 days. If clinical signs of disease have not improved within 6 days, discontinue treatment and reevaluate diagnosis. The safety of lincomycin has not been demonstrated in pregnant swine or swine intended for breeding. Federal law restricts this drug to use by or on the order of a licensed veterinarian.(2)Chickens -(i)Amount. 64 milligrams per gallon of drinking water.(ii)Indications for use. For the control of necrotic enteritis caused by Clostridium perfringens susceptible to lincomycin in broiler chickens.(iii)Limitations. Discard medicated drinking water if not used within 2 days. Prepare fresh stock solution daily. Administer for 7 consecutive days. Do not allow rabbits, hamsters, guinea pigs, horses, or ruminants access to water containing lincomycin. Not for use in layer and breeder chickens. Federal law restricts this drug to use by or on the order of a licensed veterinarian.(3)Honey bees -(i)Amount. Mix 100 milligrams lincomycin with 20 grams confectioners'/powdered sugar and dust over the top bars of the brood chamber once weekly for 3 weeks.(ii)Indications for use. For the control of American foulbrood (Paenibacillus larvae).(iii)Limitations. The drug should be fed early in the spring or late in the fall and consumed by the bees before the main honey flow begins to avoid contamination of production honey. Complete treatments at least 4 weeks before main honey flow. Federal law restricts this drug to use by or on the order of a licensed veterinarian.48 FR 3966, Jan. 28, 1983, as amended at 55 FR 3209, Jan. 31, 1990; 60 FR 14217, Mar. 16, 1995; 62 FR 65020, Dec. 10, 1997; 64 FR 13341, Mar. 18, 1999; 64 FR 13508, Mar. 19, 1999; 64 FR 66382, Nov. 26, 1999; 65 FR 10705, Feb. 29, 2000; 67 FR 17284, Apr. 10, 2002; 67 FR 71819, Dec. 3, 2002; 67 FR 78356, Dec. 24, 2002; 68 FR 3817, Jan. 27, 2003; 70 FR 1818, Jan. 11, 2005; 77 FR 20988, Apr. 9, 2012; 77 FR 29217, May 17, 2012; 78 FR 28823, May 20, 2014; 81 FR 22523, Apr. 18, 2016; 81 FR 94989, Dec. 27, 2016; 83 FR 48945, Sept. 28, 2018; 84 FR 8972, Mar. 13, 2019. Redesignated at 85 FR 18119, Apr. 1, 2020, as amended at 88 FR 16547, Mar. 20, 2023; 88 FR 84700, Dec. 6, 2023 81 FR 22523, 4/18/2016; 81 FR 94989, 12/27/2016; 83 FR 48945, 9/28/2018; 84 FR 8972, 3/13/2019. Redesignated at 85 FR 18119, 4/1/2020; as amended at 88 FR 16547, 3/20/2023; 88 FR 84700, 12/6/2023