Cellular fatty acid composition of Actinobacillus actinomycetemcomitans and Haemophilus aphrophilus

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Abstract
Strains of A. actinomycetemcomitans isolated from deep pockets of patients with juvenile periodontitis were analyzed for their content of cellular fatty acids. Oral Haemophilus strains, morphologically and biochemically similar to H. aphrophilus, were also examined for their content of cellular fatty acids. The extractable lipids of the actinobacilli represented approximately 10% of the cell dry weight, with the bound lipids representing 2-5%. The major fatty acids consisted of myristic (C14:0) and palmitic (C16:0) acids and a C16:1 acid, possibly palmitoleic acid, accounting for 21, 35 and 31% of the total extractable fatty acids, respectively. Haemophilus strains had a similar cellular fatty acid content.

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