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COLI‐AEROGENES BACTERIA FROM FARM DAIRY EQUIPMENT AND RAW MILK
Author(s) -
THOMAS S. B.,
HOBSON PHYLLIS M.,
ELSON K.
Publication year - 1958
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.1365-2672.1958.tb00115.x
Subject(s) - citrobacter freundii , enterobacter aerogenes , milking , raw milk , escherichia coli , bacteria , biology , enterobacter cloacae , food science , coliform bacteria , microbiology and biotechnology , enterobacteriaceae , zoology , biochemistry , genetics , gene
SUMMARY: A series of 1,040 cultures of coli‐aerogenes bacteria isolated at 30° from farm dairy equipment and raw milk was classified according to the recommendations of the Coliform Sub‐Committee of the Society for Applied Bacteriology (Report, 1949). The distribution of species and types isolated from milk did not differ materially from that for dairy equipment, Klebsiella cloacae, K. aerogenes and Citrobacter freundii being the dominant species, while the incidence of Escherichia coli was relatively low. There was no marked seasonal incidence of any type, though E. coli I formed a slightly higher proportion of the coli‐aerogenes microflora in winter, whereas K. aerogenes I was slightly higher in summer. Many of the cultures of the dominant types, K. cloacae, K. aerogenes I and Cit. freundii I, did not form acid and gas from lactose in two days at 37°. Consequently 37° negative, anaerogenic and paracolon strains constituted a relatively high proporton (49%) of the coli‐aerogenes microflora.