[Code of Federal Regulations]
[Title 9, Volume 1]
[Revised as of January 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 9CFR113.42]

[Page 667-668]
 
                  TITLE 9--ANIMALS AND ANIMAL PRODUCTS
 
  CHAPTER I--ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF 
                               AGRICULTURE
 
PART 113_STANDARD REQUIREMENTS--Table of Contents
 
Sec. 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.

[[Page 668]]

    (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]