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COLI‐AEROGENES BACTERIA ISOLATED FROM EARS AND PANICLES OF CEREAL CROPS
Author(s) -
THOMAS S. B.,
HOBSON PHYLLIS M.,
ELSON K.,
PRICEROBERTS GLENYS
Publication year - 1955
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.1365-2672.1955.tb02054.x
Subject(s) - bacteria , enterobacter aerogenes , biology , escherichia coli , microbiology and biotechnology , food science , biochemistry , genetics , gene
SUMMARY: Aerogenes‐cloacae and Intermediate types of coli‐aerogenes bacteria were found to be normal inhabitants of ears and panicles of growing cereals. Coli‐aerogenes bacteria, producing acid and gas in MacConkey's broth within 5 days at 30°, were isolated from 73% of the 148 samples, the number being as high as 10 5 /g in a third. The number of organisms increased during the growing season. Less than a third of the samples contained 37° positive strains, but approximately 10% were positive in 10 ‐3 g or less at this temperature. A high proportion (71.1%) of the 180 classifiable cultures did not produce acid and gas in MacConkey's broth in 2 days at 37°. Organisms of the aerogenes‐cloacae types were dominant, constituting 80.6% of the classifiable strains at 30° and 80.8% of the 37° positive strains. Intermediate type I, particularly 37° negative and gelatin liquefying variants, was the next most common type.