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Representative DNA profiles obtained by pulsed field gel electrophoresis of SmaI digests from Canadian epidemic strains of methicillin-resistant Staphylococcus aureus (MRSA). Lanes 1 and 6, lambda DNA concatamers; lane 2, Canadian MRSA strain (CMRSA)-1; lane 3, CMRSA-2; lane 4, CMRSA-3; lane 5, CMRSA-4
