21 CFR 520.2123b
§ 520.2123b Spectinomycin powder.
United States · 21 CFR — Food and Drugs · Status: effective
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- Citation
- 21 CFR 520.2123b, § 520.2123b Spectinomycin powder, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/87308
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Full text
(a) Specifications. Each gram (g) of powder contains spectinomycin dihydrochloride pentahydrate equivalent to 0.5 g spectinomycin.
(b) Sponsor. See No. 061133 in § 510.600(c) of this chapter.
(c) Related tolerances. See § 556.600 of this chapter.
(d) Conditions of use in chickens. It is administered in the drinking water of growing chickens as follows:
(1) Indications for use and amounts.
(i) As an aid in controlling infectious synovitis due to Mycoplasma synoviae in broiler chickens, administer 1 g per gallon of water as the only source of drinking water for the first 3 to 5 days of life.
(ii) As an aid in the prevention or control of losses due to CRD associated with M. gallisepticum (PPLO) in growing chickens, administer 2 g per gallon of water as the only source of drinking water for the first 3 days of life and for 1 day following each vaccination.
(2) Limitations. Do not administer to laying chickens. Do not administer within 5 days of slaughter. Federal law restricts this drug to use by or on the order of a licensed veterinarian.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.