title: Occurrence of methicillin-resistant and -susceptible Staphylococcus aureus within a single colony contributing to MRSA mis-identification.
abstract: Many methods have been described for the detection of methicillin-resistant Staphylococcus aureus (MRSA), but the homogeneous or heterogeneous expression of methicillin resistance affects the reliability of those methods. This study demonstrates that close association between methicillin-susceptible S. aureus (MSSA) and MRSA strains in the host colonisation site can present additional problems for the detection of MRSA in clinical laboratories, which may contribute to failure in the control of MRSA infection in hospital. Worse, this association may also account for the emergence of MRSA during antibiotic therapy.
authors.affiliation: Universidade Federal do Rio de Janeiro, Instituto de Microbiologia Prof. Paulo de GÖes, Laboratorio de Biologia Molecular de Bacterias, Cidade Universitaria, CCS Bloco I, 21941.590, Rio de Janeiro, RJ, Brazil.
authors.forename: M H L
authors.initials: MHL
authors.lastname: Falcao
authors.affiliation: Universidade Federal do Rio de Janeiro, Instituto de Microbiologia Prof. Paulo de GÖes, Laboratorio de Biologia Molecular de Bacterias, Cidade Universitaria, CCS Bloco I, 21941.590, Rio de Janeiro, RJ, Brazil.
authors.forename: L A
authors.initials: LA
authors.lastname: Texeira
authors.affiliation: Universidade Federal do Rio de Janeiro, Instituto de Microbiologia Prof. Paulo de GÖes, Laboratorio de Biologia Molecular de Bacterias, Cidade Universitaria, CCS Bloco I, 21941.590, Rio de Janeiro, RJ, Brazil.
authors.forename: B T
authors.initials: BT
authors.lastname: Ferreira-Carvalho
authors.affiliation: Universidade Federal do Rio de Janeiro, Instituto de Microbiologia Prof. Paulo de GÖes, Laboratorio de Biologia Molecular de Bacterias, Cidade Universitaria, CCS Bloco I, 21941.590, Rio de Janeiro, RJ, Brazil.
authors.forename: A A
authors.initials: AA
authors.lastname: Borges-Neto
authors.affiliation: Universidade Federal do Rio de Janeiro, Instituto de Microbiologia Prof. Paulo de GÖes, Laboratorio de Biologia Molecular de Bacterias, Cidade Universitaria, CCS Bloco I, 21941.590, Rio de Janeiro, RJ, Brazil.
authors.forename: A M S
authors.initials: AMS
authors.lastname: Figueiredo
mesh_terms: D003470:Culture Media; D004269:DNA, Bacterial / Q000032:analysis; D016521:Electrophoresis, Gel, Pulsed-Field; D006801:Humans; D008712:Methicillin / Q000494:pharmacology*; D016106:Methicillin Resistance / Q000235:genetics; D008826:Microbial Sensitivity Tests; D009297:Nasal Mucosa / Q000382:microbiology; D010406:Penicillins / Q000494:pharmacology*; D012150:Polymorphism, Restriction Fragment Length; D013211:Staphylococcus aureus / Q000187:drug effects* / Q000235:genetics / Q000302:isolation & purification
chemical_list: D003470:Culture Media; D004269:DNA, Bacterial; D010406:Penicillins; D008712:Methicillin