Staphylococcus aureus: epidemiology and prevalence of methicillin resistant strains in Morocco

ABSTRACT

To evaluate the place of S. aureus among the microorganisms isolated in the laboratory of bacteriology of the hospital Sheik Zaid [HCZ]. To determine the different cases of SARMS, in HCZ and hospital military Mohammed V [HMMV] in order to institute an epidemiological suprvision of them. During a retrospective survey achieved in two years [1/4/06 to 3/3/08], the microbial ecology and the sensitivity of S. aureus to the antibiotics have been analyzed. 1433 strains have been isolated in different withdrawals and departments of the HCZ among which, there were 86 strains of S. aureus [6.7%]. This case reached 10% in the intensive care unit. In the other units, the frequencies of S. aureus were weaker. The case of S. aureus also depended on the withdrawal nature19% in the pus, 10.7% in the blood culture, 6.1% for the needle aspiration liquids, 4.6% for the pulmonary sample.. The two establishments, HCZ and HMMVS, permitted us to isolate 185 strains of S. aureus. 25 strains [13.5%] proved to be resistant to the methicillin [SARM]. These strains essentially came from intensive care unit [15/25] follow-ups of the surgery units [5/25] and of medicine units [5/25]. The SARMS gave rates raised of the resistances to other antibiotics between 64 and 76% for erythromycin, gentamicin, fusidic acid, fluoroquinolone and trimethoprim-sulfamethoxazole. The frequency of the S. aureus and the SARMS remains weak in Morocco. On the other hand, the resistance of the SARMS to other antibiotics is troubling. It is absolutely necessary to master the diffusion of these stumps for the control of the epidemics to multiresistants bacteria