Abstract
The cellular fatty acid composition of 41 strains of suspected Campylobacter jejuni, 23 from human cases of gastroenteritis and 18 from animals, was examined by gas-liquid chromatography. Three of the 23 human isolates and 2 of 18 animal isolates did not contain 19:0 cyclopropane fatty acid and were identified as C. laridis. The remaining 36 strains had cellular fatty acid profiles consistent with C. jejuni but could be divided into three groups on the ratio of the concentration of 18:1 and 19:0 cycloproprane. Most human isolates (85%) were in groups II or III whereas most animal isolates (56%) were in group I. It is proposed that gas-liquid chromatographic analysis of cellular fatty acids is a relatively easy method for epidemiological typing of C. jejuni isolates.
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