Control Tests
16. Control tests shall be carried out each day that a test is initiated using –
(a)Clostridium perfringens NCTC 10662(1) no more than 28 days old at the time of use;
(b)Escherichia coli NCTC 10418 or equivalent not more than 28 days old at the time of use; and
(c)processed animal protein or compost or digestion residue which is free of Clostridium perfringens.
(1)
The National Collection of Type Cultures, Central Public Health Laboratory, 61 Colindale Avenue, London NW9 5HT.