title: The influence of penicillin on Lactobacillus leichmannii serum B(12) assay.
abstract: The influence of penicillin on vitamin B(12) assay using L. leichmannii as the test organism was investigated, and it was found that penicillin even in a low serum concentration invalidated the test.
authors.affiliation: Department of Pathology, Stoke Mandeville Hospital, Aylesbury, Bucks.
authors.forename: B
authors.initials: B
authors.lastname: Boczarow