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Speciation, serotyping, antimicrobial sensitivity and plasmid content of Proteeae from the environment of calf-rearing units in South West England

Published online by Cambridge University Press:  19 October 2009

P. M. Hawkey
Affiliation:
Department of Microbiology, University of Bristol, University Walk, Bristol BS8 TD1, England
J. L. Penner
Affiliation:
Department of Microbiology, University of Toronto, Banting Institute, 100 College Street, Toronto, Ontario MG5 1L5, Canada
A. H. Linton
Affiliation:
Department of Microbiology, University of Bristol, University Walk, Bristol BS8 TD1, England
C. A. Hawkey
Affiliation:
Department of Microbiology, University of Bristol, University Walk, Bristol BS8 TD1, England
L. J. Crisp
Affiliation:
Department of Microbiology, University of Toronto, Banting Institute, 100 College Street, Toronto, Ontario MG5 1L5, Canada
M. Hinton
Affiliation:
Department of Veterinary Medicine, University of Bristol, Langford House, Langford, Avon BS18 7DU, England
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A survey was undertaken of the occurrence, serotype, antimicrobial sensitivity and plasmid content of members of the tribe Proteeae in the environment of two calf-rearing units in the county of Avon in South West England. Examples of the following species were found: Proteus mirabilis, Prot. vulgaris, Prot. vulgaris Biogroup 2, Morganella morganii, Providencia stuartii, Prov. alcalifaciens and Prov. rettgeri. A wide range of sero types was found, many having been previously reported from nosocomial isolates. A total of 15% of isolates carried plasmids; six pairs of isolates were identified which had identical sero typesbut different patterns of plasmid carriage. The antimicrobial sensitivity of the isolates was generally similar to isolates of Proteeae from humans. Although no truly aminoglycosideresistantisolates were found, some isolates of Prov. stuartii and Prov. rettgeri had MIC's higher than the other isolates to gentamicin and netilmicin, suggesting the presence of lowlevels of the enzyme AAC 2′. The study demonstrates that there is a considerable diversityof species and types of Proteeae associated with calves and their environment. It seems likely that a potential cause of colonization of the human gut by Proteeae is the consumption of meat.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1986

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