Cellular fatty acid composition of Campylobacter fetus

Abstract
The cellular fatty acid composition of 29 human and animal isolates of C. fetus was determined with GLC. All strains contained small amounts of 3-hydroxytetradecanoic acid, suggesting the presence of lipid A. Each of 13 different blood or stool isolates [from humans] of C. fetus ssp. jejuni obtained from humans or fowl contained a 19-C cyclopropane acid which was not present in C. fetus ssp. fetus (6 strains from cattle) or C. fetus ssp. intestinalis (10 strains from humans and cattle). Evidently C. fetus ssp. jejuni can be rapidly differentiated from other C. fetus by GLC analysis of cellular fatty acids.