Study of antibiotic resistance pattern of Staphylococcus aureus strains isolated from blood cultures in Tabriz Shahid Madani Hospital

Background: Staphylococcus aureus (S aureus) is one of the important agents of many infections in hospitals and society. Increasing S aureus resistance to antibacterial drugs is one of the major health concerns, therefore studying antibiotic resistance of S aureus is very important and it has a main role in preventing creation of resistant strains.

Methods: This investigation was a retrospective study and it was done by studying of 513 hospitalized heart disease patients' blood culture records in Tabriz Shahid Madani Hospital during a one-year period (2010). Statistical analysis of data has performed by Microsoft Office Excel software.

Results: Microorganisms in 71 cases (%14) of blood cultures grew. Eighteen point (three percent) of positive cultures were related to S aureus. Four cases (%31) of S aureus positive patients were females whereas 9 cases (%69) were males and the age average of patients was over than 40 years. The most of resistant cases (%31) were related to methicillin and ceftriaxon. Conclusion: This study showed that care and control must be performed on these bacteria together with avoiding unnecessary prescription of antibiotics because this affair can create and increase drug resistant strains.