Intercontinental Spread of a Multidrug-Resistant MethicillinResistant Staphylococcus aureus Clone

Author:

de Sousa M. Aires1,Sanches I. Santos12,Ferro M. L.3,Vaz M. J.4,Saraiva Z.5,Tendeiro T.5,Serra J.5,de Lencastre H.126

Affiliation:

1. Unidade de Genética Molecular, Instituto de Tecnologia Quı́mica e Biológica da Universidade Nova de Lisboa (ITQB/UNL), Oeiras,1

2. Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa (FCT/UNL), Monte da Caparica,2

3. Hospital de São José3 and

4. Hospital de São João, Oporto,4 and

5. Instituto Português de Oncologia de Francisco Gentil,5 Lisbon, Portugal, and

6. Laboratory of Microbiology, The Rockefeller University, New York, New York6

Abstract

ABSTRACT Two hundred ten methicillin-resistant Staphylococcus aureus (MRSA) isolates recovered between 1990 and 1997 from three Portuguese hospitals located in Lisbon and Oporto were analyzed by molecular fingerprinting techniques. The hybridization of Cla I restriction digests with the mecA - and Tn 554 -specific DNA probes combined with pulsed-field gel electrophoresis documented the abrupt appearance and extensive intrahospital spread of the Brazilian epidemic MRSA clone in the 1995 samples of each one of the three hospitals analyzed—suggesting the intercontinental transfer of this strain from Brazil to Portugal. The appearance of this clone may challenge the dominance of another highly epidemic imported clone—the Iberian MRSA, currently the most widely spread MRSA clone in Portuguese hospitals.

Publisher

American Society for Microbiology

Subject

Microbiology (medical)

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