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The distribution of plasmids among a representative collection of Scottish strains of salmonellae

Published online by Cambridge University Press:  19 October 2009

D. J. Platt
Affiliation:
University Department of Bacteriology, Glasgow Royal Infirmary, Castle Street, Glasgow G4 0SF
D. J. Brown
Affiliation:
University Department of Bacteriology, Glasgow Royal Infirmary, Castle Street, Glasgow G4 0SF
D. S. Munro
Affiliation:
Scottish Salmonella Reference Laboratory, Stobhill General Hospital, Glasgow G21 3UW
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The distribution of plasmids was studied in a representative collection of salmonella strains which comprised 98 Salmonella typhimurium and 96 other serotypes. Plasmids were detected in 72% of strains (mean 1·3 plasmids/strain) and individual strains harboured between 0 and 7 plasmids. They were more common among S. typhimurium than other serotypes (incidence 92 and 53%; mean 1·9 and 0·8 plasmids/strain respectively). Although a higher proportion of S. typhimurium (33%) were antibiotic-resistant compared to other serotypes (14%) the evidence presented indicated that R-plasmids were not responsible for the difference observed in the number and distribution of plasmids in these strains. These results were discussed in comparison with similar studies of Escherichia coli and other enteric genera.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1986

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