9 CFR 113.42 - Detection of lymphocytic choriomeningitis contamination.

§ 113.42 Detection of lymphocytic choriomeningitis contamination.

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.

[ 42 FR 6794, Feb. 4, 1977]

Title 9 published on 14-Sep-2017 03:43

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 9 CFR Part 113 after this date.

  • 2016-08-30; vol. 81 # 168 - Tuesday, August 30, 2016
    1. 81 FR 59427 - Viruses, Serums, Toxins, and Analogous Products; Packaging and Labeling
      GPO FDSys XML | Text
      DEPARTMENT OF AGRICULTURE, Animal and Plant Health Inspection Service
      Final rule.
      Effective October 31, 2016.
      9 CFR Parts 101, 103, 112, 113, and 114
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