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Abstract

Objective: This study aimed to determine the prevalence of Group A β-hemolytic streptococcus in oropharynx of asymptomatic children who attend a public school and also the sensitivity and resistance profile of these bacteria to antibiotics commonly tested Methods: It was used sterile swabs to collect samples from the orpharynx of asymptomatic children for the accomplishment of microbiological culture. These children should not be using any antibiotic. For the differentiation of samples between others beta hemolytic species, bacitracin and L-Pyrrolidonyl-β-Naphthylamide tests were performed. All Group A β-hemolytic streptococcus samples were submitted to antibiogram test to establish the sensitivity and resistance profile. Results:From the 229 samples analyzed the etiological agent of study was detected in 4.8%. Antibiogram test was made and despite of the high sensitivity observed, there were cases of intermediate and / or total resistance to the antibiotics tested: beta-lactams, microclines and cephalosporin of the 3rd and 4th generation. In addition, only one of the positive cases for the bacterium under study was sensitive to all antibiotics. Conclusion:These results are relevant considering that bacteria belonging to Group A Beta-hemolytic Streptococcus are one of the microorganisms of major clinical interest, mainly when diagnosed in children. Thus, in order to reduce bacterial resistance to antibiotics it is important to use these drugs rationally.