21 C.F.R. § 558.248 Erythromycin thiocyanate.
Title 21 - Food and Drugs
(a) Approvals. Type A medicated articles: (1) 2.2 percent to 061623 in §510.600(c) of this chapter for use as in paragraph (d) of this section. (2) 5 and 10 percent to 061623 for use in paragraphs (d)(1)(i) and (ii) of this section. (b) Special considerations. The levels of antibiotic are expressed in terms of erythromycin master standard. One gram of erythromycin thiocyanate is equivalent to 0.925 gram of erythromycin master standard. (c) Related tolerances. See §556.230 of this chapter. (d) Condition of use. (1) It is used as follows: (2) In feed for feedlot beef cattle at 37 milligrams per head per day as an aid in stimulating growth and improving feed efficiency. (3) Erythromycin thiocyanate may be used in accordance with the provisions of this section in the combinations provided as follows: (i) Amprolium in accordance with §558.55. (ii) Amprolium and ethopabate in accordance with §558.58. (iii) Arsanilic acid in accordance with §558.62. (iv) Zoalene in accordance with §558.680. [41 FR 10999, Mar. 15, 1976, as amended at 45 FR 56799, Aug. 26, 1980; 49 FR 31281, Aug. 6, 1984; 51 FR 7397, Mar. 3, 1986; 52 FR 2684, Jan. 26, 1987; 54 FR 12189, Mar. 24, 1989; 66 FR 14074, Mar. 9, 2001; 68 FR 4915, Jan. 31, 2003]
Title 21: Food and Drugs
PART 558—NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS
Subpart B—Specific New Animal Drugs for Use in Animal Feeds
§ 558.248 Erythromycin thiocyanate.
----------------------------------------------------------------------------------------------------------------Erythromycin thiocyanate in grams Combination in grams per ton per ton Indications for use Limitations Sponsor----------------------------------------------------------------------------------------------------------------(i) 4.6 to 18.5.................. .................... Chickens; growth ................... , promotion and feed 061623 efficiency.(ii) 9.25 to 18.5................ .................... Turkeys; growth For turkeys not , promotion and feed over 12 weeks of 061623 efficiency. age.(iii) 9.25 to 64.75.............. .................... Swine; increase in Starter ration for 061623 weight gain, improved animals up to 35 feed efficiency in lb body weight. starter pigs (9.25 to 64.75) and grower- finishing pigs (9.25).(iv) 18.5........................ .................... Laying chickens; aids ................... 061623 in increasing egg production.(v) 92.5......................... .................... 1. Chickens; as an aid Feed for 2 d before 061623 in the prevention of stress and 3 to 6 chronic respiratory d after stress; disease during periods withdraw 24 h of stress. before slaughter. 2. Chickens; as an aid Feed for 7 to 14 d; in the prevention of withdraw 24 h infectious coryza. before slaughter. 3. Turkeys; as an aid Feed for 2 d before in the prevention of stress and 3 to 6 chronic respiratory d after stress. disease during periods of stress.(vi) 185......................... .................... 1. Chickens; as an aid Feed for 5 to 8 d; 061623 in the prevention and do not use in reduction of lesions birds producing and in lowering eggs for food severity of chronic purposes; withdraw respiratory disease. 48 h before slaughter. 2. Turkeys; as an aid Feed for 5 to 8 d; 061623 in the prevention and do not use in reduction of lesions birds producing and in lowering eggs for food severity of chronic purposes. respiratory disease.----------------------------------------------------------------------------------------------------------------
