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首页> 外文期刊>Romanian Journal of Laboratory Medicine >Detection of mecA gene in clinical Staphylococcus aureus isolates from Infectious Diseases Hospital, Iasi, Romania
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Detection of mecA gene in clinical Staphylococcus aureus isolates from Infectious Diseases Hospital, Iasi, Romania

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Introduction. Since it was first described in 1961, methicillin-resistant Staphylococcus aureus (MRSA) has been an increasingly important cause of health care-associated infections worldwide. During the 1990s, new strains of MRSA emerged and caused community-associated infections on multiple continents. Methods. We have investigated 151 clinically significant S. aureus strains isolated from blood cultures, cerebra-spinal fluid, pus, sputum samples collected from patients with infections admitted to the Infectious Diseases Hospital "Sf Parascheva" Iasi, Romania, between January 2008 and December 2009. We have performed real-time PCR for mecA gene detection, disk diffusion susceptibility testing and minimum inhibitory concentration determination to anti-staphylococcal antibiotics for all isolates. Results. The oxacillin resistance rate was 45.7. All MRSA strains were susceptible to vancomycin, linezolid and teicoplanin; however, they exhibited high rates of resistance to erythromycin (70.5), tetracycline (67.6), gentamicin (48.5) and ciprofloxacin (44.1). Susceptibility rate to trimethoprim/sulfamethoxazole in MRSA strains was 89.7. Almost a third of the tested strains had oxacillin MICs >256 mu g/ml. For 90 of the strains vancomycin MICs was 2 mu g/ml. Conclusions. Glycopeptides remain the first choice therapy for MRSA infections. To preserve their value, their use should be limited to those cases where they are clearly needed.

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