Comparison of biochemical, morphologic, and chemical characteristics of Centers for Disease Control fermentative coryneform groups 1, 2, and A-4

Author:

Na'Was T E,Hollis D G,Moss C W,Weaver R E

Abstract

A total of 24 strains of fermentative coryneform like bacteria isolated from clinical specimens form two distinct groups which have been designated Centers for Disease Control (CDC) fermentative coryneform groups 1 (13 strains) and 2 (11 strains). The phenotypic characteristics of group 1 were similar to those of a previously described CDC group designated A-4, with the major differentiating characteristic being the inability to hydrolyze esculin. Major differences in cellular fatty acid composition between CDC groups 1 and A-4 were also observed. The branched-chain fatty acids 14-methylhexadecanoate and 12-methyltetradecanoate, which account for more than 80% of the total acids of group A-4, were not detected in cells of group 1 strains. Groups 1 and 2, which have similar cellular fatty acid compositions, can be differentiated on the basis of fermentation of xylose, mannitol, lactose, sucrose, and melibiose by group 1 but not by group 2. The sources of isolation of the strains of both groups varied. Only group 1 strains were associated with eye infections.

Publisher

American Society for Microbiology

Subject

Microbiology (medical)

Reference6 articles.

1. Clark W. A. D. G. Hollis R. E. Weaver and P. Riley. 1984. Media and methods p. 7-25. In Identification of unusual pathogenic gram-negative aerobic and facutatively anaerobic bacteria. Centers for Disease Control. Atlanta Ga.

2. Two similar but atypical strains of coryneform group A-4 isolated from patients with endophthalmitis;Coudron P. E.;J. Clin. Microbiol.,1985

3. Hollis D. G. and R. E. Weaver. 1981. Gram positive organisms: a guide to identification. Centers for Disease Control Atlanta Ga.

4. Identification of microorganisms by gas chromatographic-mass spectrometric analysis of cellular fatty acids;Moss C. W.;J. Chromatogr.,1975

5. Gas liquid chromatography of bacterial fatty acids with a fused silica capillary column;Moss C. W.;J. Clin. Microbiol.,1980

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