STAR gene restriction profile analysis in epidemiological typing of methicillin-resistant Staphylococcus aureus: description of the new method and comparison with other polymerase chain reaction (PCR)-based methods.
A method based on restriction profile analysis of the STAR repetitive element PCR (STAR-RP PCR) product obtained by digestion with AluI and Tru9I was developed for typing methicillin resistant Staphylococcus aureus (MRSA). We evaluated a well defined collection of MRSA from Argentina, previously characterized by PFGE (pulsed field gel electrophoresis) of chromosomal SmaI digests and hybridization with DNA probes for probes ClaI-mecA and ClaI-Tn554. We comparatively evaluated STAR-RP analysis with other PCR based methods such as Inter IS256-PCR, Rep-MP3 PCR and Coa-RP. The discriminatory power (D) of STAR-RP (0.86) was similar to that of PFGE (0.84) at the type level. Comparable results were obtained with Inter IS256 PCR (0.85) and Rep-MP3 PCR (0.80). A lower value (0.74) was obtained for Coa-RP. An excellent reproducibility (100%) of STAR-RP was observed. Good concordance between STAR-RP and other molecular typing methods was found for MRSA isolates (n = 39). STAR-RP typing showed 87% concordance with mecA::Tn554::PFGE, 87% with Inter IS256 PCR and 71% with Rep-MP3 typing. STAR-RP is suggested as an adequate molecular typing assay for MRSA epidemiologic assessment.
Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina.
Liliana S
LS
Quelle
Alejandra
A
Corso
Marcelo
M
Galas
Daniel O
DO
Sordelli
D001118:Argentina; D015373:Bacterial Typing Techniques; D004269:DNA, Bacterial / Q000032:analysis; D006801:Humans; D016106:Methicillin Resistance; D017720:Molecular Epidemiology; D016133:Polymerase Chain Reaction / Q000379:methods*; D012150:Polymorphism, Restriction Fragment Length; D012680:Sensitivity and Specificity; D013203:Staphylococcal Infections / Q000175:diagnosis* / Q000235:genetics; D013211:Staphylococcus aureus / Q000145:classification* / Q000235:genetics
D004269:DNA, Bacterial