9 CFR 113.42
§ 113.42 Detection of lymphocytic choriomeningitis contamination.
United States · 9 CFR — Animals and Animal Products · Status: effective
Cite this
- Citation
- 9 CFR 113.42, § 113.42 Detection of lymphocytic choriomeningitis contamination, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/33940
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Full text
The test for detection of lymphocytic choriomeningitis (LCM) virus provided in this section shall be conducted when such a test is prescribed in an applicable Standard Requirement or in a filed Outline of Production. Vaccine virus may be neutralized with specific antiserum when necessary.
(a) Each of at least 10 mice obtained from a source free of LCM shall be injected in the footpad of a hindfoot with 0.02 ml of the material being tested and observed each day for 21 days.
(b) If any of the mice show swelling in the injected footpad or if more than one becomes systemically abnormal, the material being tested is unsatisfactory.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.