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Triplex real-time pcr for detection of methicillin-resistant staphylococcus aureus and Panton-Valentine leukocidin in North-East Romania. | LitMetric

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Article Abstract

Unlabelled: The aim of the present study was to investigate S. aureus isolates for the presence of methicillin-resistance and Panton-Valentine leukocidin (PVL) genes and to further characterize positive strains by means of antibiotic resistance patterns.

Material And Methods: We used a triplex Real-Time PCR method for simultaneous detection of nuc, mecA and pvl genes in clinical isolates from 188 patients admitted to "Sf. Parascheva" Infectious Diseases Hospital laşi, during a 3 year period (2008-2010).

Results: The study revealed a relatively high rate of PVL-producing strains (23.93%), mainly community-associated (CA-MRSA) (51.11%). Most pvl-positive CA-MRSA isolates were resistant to erythromycin (91.3%), but none was resistant to clindamycin, fluoroquinolones, rifampicin, chloramphenicol or fusidic acid.

Conclusions: Antibiotic susceptibility testing showed a high rate of multidug-resistance among strains classified as CA-MRSA (54.83%), but not among PVL-producers (4.44%). Although resistance to fusidic acid was previously proposed as a marker for PVL-producing CA-MRSA, our data suggest that we cannot rely on resistance to fusidic'acid to screen for PVL-producing CA-MRSA in our setting.

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