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Received: October 2016, Accepted: December 2016 Background: Methicillin-resistant Staphylococcus aureus (MRSA) is resistant to most antibiotics and is an important pathogen of nosocomial infections. The prevalence of community (CA-MRSA) and hospital acquired methicillin-resistant S. aureus (HA-MRSA) infection is increased. In this study we investigated the frequency of MRSA colonization and its antibiotic susceptibility in students of Rafsanjan University of Medical Sciences, Iran. Materials and Methods: In this cross-sectional study, we evaluated 200 nursing, midwifery and paramedical students. Nasal swabs were taken from all cases and were cultured on a blood medium agar. Methicillin resistance was confirmed using Oxacillin and cefoxcitin disks. Inducible clinadamycin resistance was identified using D-zone test. Demographic and specific information were collected by questionnaire. Data were analyzed by chi-square test. Results: Among 200 studied cases, the frequency of nasal carriers for S. aureus was 5%. Six (60%) out of 10 S. aureus isolates were MRSA strains. Fifty percent of MRSA and 25% of methicillinsusceptible S. aureus (MSSA) were resistant to clindamycin. Four out of 6 strains of MRSA and 1 of the MSSA strains were resistant to erythromycin and D test was positive in 50% of cases. Conclusions: Nasal carriers of the resistant strains of S. aureus are always a serious threat to themselves and others. The rate of MRSA colonization, especially clindamycin-resistant strains, was high among studied cases, emphesizing the need for screening S. aureus.

journal of occupational health and epidemiology

Assessment of the frequency of Staphylococcus aureus carriers and its antibiotic susceptibility in paramedical students in Rafsanjan University of Medical Sciences, Iran