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- Title
COLI-AEROGENES BACTERIA IN FARM WATER SUPPLIES.
- Authors
THOMAS, S. B.; HOBSON, PHYLLIS M.; DRUCE, R. G.; BOWEN, D. L.; JONES, R. G.; MACKENZIE, ELIN; VAUGHAN, W. L. R.
- Abstract
SUMMARY: A series of 825 cultures of coli-aerogenes bacteria isolated at 30° and a series of 735 cultures isolated at 37° from 645 samples of farm water supplies were classified according to the recommendations of the Coliform Sub-Committee of the Society for Applied Bacteriology (Report, 1949). Klebsiella constituted 50% of the cultures isolated at 30°, whereas Escherichia coli I was the dominant type, forming 57%, among the cultures isolated at 37°. It would thus appear that isolation at 30° is as selective for Klebsiella as isolation at 37° is for Escherichia. Coli-aerogenes organisms, mainly 37° negative strains of Citrobacter freundii I and K. cloacae, were found in waters of high sanitary quality derived from protected springs and wells; but the coli-aerogenes microflora of polluted water was dominated by E. coli I, which formed 43% of the isolates at 30° and 76% of those at 37°. The results for a series of fortnightly samples from 11 farm water supplies showed a marked seasonal variation in the incidence of different types isolated at 30°; E. coli I formed a higher proportion in summer than in winter, while 37° negative strains of Klebsiella and Citrobacter formed a higher proportion in winter than in summer.
- Publication
Journal of Applied Microbiology, 1959, Vol 22, Issue 1, p32
- ISSN
1364-5072
- Publication type
Article
- DOI
10.1111/j.1365-2672.1959.tb04607.x