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OBSERVATIONS ON THE ANAEROBES PRESENT IN A CITY WATER SUPPLY, WITH SPECIAL REFERENCE TO CLOSTRIDIUM WELCHII
Author(s) -
WILLIS A. T.
Publication year - 1957
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1957.tb04516.x
Subject(s) - clostridia , subculture (biology) , microbiology and biotechnology , isolation (microbiology) , clostridiaceae , clostridium perfringens , biology , food science , bacteria , genetics , toxin
SUMMARY: Black colonies 3 mm or more in diameter, which developed in Wilson & Blair's medium inoculated with samples of untreated water from a city water supply, were examined for their anaerobe content by isolation of pure cultures and by subculture in milk. It was shown that the development of such colonies almost always signifies the presence of clostridia, usually Cl. welchii , and that subculture of such a colony into milk gives reliable confirmation of the presence of clostridia in general and of Cl. welchii in particular. Fifty strains of Cl. welchii isolated from the water supply were examined, but none was found to be of the heat‐resistant food‐poisoning variety described by Hobbs et al. (1953).