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Appl Environ Microbiol. 1970 July; 20(1): 151-155
Copyright © 1970 American Society for Microbiology. All Rights Reserved.

Unusual Fermentative, Gram-Negative Bacilli Isolated from Clinical Specimens

I. Characterization of Erwinia Strains of the "lathyri-herbicola Group"

Department of Laboratories, Hospital for Joint Diseases and Medical Center, New York, New York 10035
Microbiology Department, Mt. Sinai Hospital and Medical School, New York, New York 10029
Clinical Laboratories, State University Hospital, Downstate Medical Center, Brooklyn, New York 11203

ABSTRACT

Five strains of gram-negative, yellow chromogenic bacilli were recovered from clinical specimens which fit the characteristics of the "lathyri-herbicola group" within the genus Erwinia. The strains were facultatively anaerobic, fermentative, anaerogenic bacilli with peritrichous flagella which grew at 37 C, reduced nitrate to nitrite, and failed to produce oxidase, pectinase, arginine dihydrolase, and decarboxylases for lysine and ornithine. Aggregations of bacteria (symplasmata) were observed in the syneresis water of slant cultures, and analogous granular aggregates and biconvex, spindle-shaped bodies developed in colonies on plate cultures. Awareness of these characteristics should result in more frequent identification of Erwinia species from human sources.