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J Bacteriol. 1973 April; 114(1): 80-85
Copyright © 1973 American Society for Microbiology. All Rights Reserved.

Fatty Acid Compositions of Paracolons: Arizona, Citrobacter, and Providencia¹

^a Department of Microbiology, Cornell University Medical College, New York, New York 10021

ABSTRACT

The fatty acid compositions of stationary-phase cultures of Arizona arizonae, Citrobacter freundii, Providencia alcalifaciens, Providencia stuartii, and Providencia sp. were studied. The major fatty acids of A. arizonae, C. freundii, and Providencia were 16:0, 16:1, 17:cyclopropane, and 19:cyclopropane. The fatty acid compositions of the two strains of A. arizonae examined were similar to each other, but the three strains of C. freundii differed from one another in their fatty acid compositions. In both A. arizonae and C. freundii, the relative quantities of saturated, unsaturated, and cyclopropane fatty acids were similar to those which have been found in stationary-phase cultures of other members of the Enterobacteriaceae. The three strains of Providencia also differed from one another in their fatty acid compositions. In all three strains, the total quantity of unsaturated fatty acids was larger and that of the cyclopropane fatty acids was smaller than those found in stationary-phase cultures of other enteric bacteria.

² Present address: Department of Bacteriology, University of California, Los Angeles, Calif. 90024.

¹ This work was part of the thesis of N.A.M. which has been accepted by the faculty of Cornell University in partial fulfillment of the requirements for the degree of Doctor of Philosophy.