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An epidemic methicillin-resistant strain of Staphylococcus aureus in Spain

Published online by Cambridge University Press:  15 May 2009

P. Aparicio
Affiliation:
Laboratorio de Referencia de Estafilococos, Centro National de Microbiologia, Majadahonda, Madrid, Spain Division of Hospital Infection, Central Public Health Laboratory, 61 Colindale Avenue, London, UK
J. Richardson*
Affiliation:
Division of Hospital Infection, Central Public Health Laboratory, 61 Colindale Avenue, London, UK
S. Martin
Affiliation:
Division of Hospital Infection, Central Public Health Laboratory, 61 Colindale Avenue, London, UK
A. Vindel
Affiliation:
Laboratorio de Referencia de Estafilococos, Centro National de Microbiologia, Majadahonda, Madrid, Spain
R. R. Marples
Affiliation:
Division of Hospital Infection, Central Public Health Laboratory, 61 Colindale Avenue, London, UK
B. D. Cookson
Affiliation:
Division of Hospital Infection, Central Public Health Laboratory, 61 Colindale Avenue, London, UK
*
*Dr J. F. Richardson, Staphylococcus Reference Laboratory. Central Public Health Laboratory. 61 Colindale Avenue. London NW9 5HT.
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Summary

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During 1990, a strain of methicillin-resistant Staphylococcus aureus became epidemic in Spain and spread in a manner analogous to that of EMRSA-1 in England. Isolates of this strain produced little protein A and were resistant to a number of antibiotics including ciprofloxacin. Beta-lactamase production was encoded by a c. 39 kb plasmid, which also conferred resistance to mercury, cadmium, ethidium bromide and propamidine isethionate.

Investigation showed that two variants, separable by supplementary and Fisk phage typing, were circulating. The B variant appeared to spread more readily than the A variant.

The opportunity was taken to compare the discriminatory power of traditional typing methods with molecular techniques. The discriminatory power of the molecular techniques used only reached the same level as the traditional methods when double enzyme digestion of total cellular DNA by EcoR I and Cla I was performed.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1992

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