Resumen

ROMERO, S. et al. Betahemolytic Streptococcus in the oropharynx of asymptomatic school children from two institutions of the Zulia state. Rev. Soc. Ven. Microbiol. [online]. 2002, vol.22, n.1, pp.6-11. ISSN 1315-2556.

To investigate beta hemolytic Streptococcus, pharyngeal swabs of 331 asymptomatic patients, belonging to two institutions of Maracaibo city were processed. The specimens were inoculated on sheep blood agar with kanamycin. Presumptive identification was made according to Facklam et al., and definitive one by means of immunology test. Of the total processed samples, 129 (38.97%) were positive for these bacteria. Distribution by serologic group was the following: 28.24% of the group B, the groups F and G 19.85%, group A 16,03%, group C 10,69% and non agruppables 5.34%. The highest incidence of beta hemolytic Streptococci corresponded to the group between 7 and 10 years old group. In this study, 2 strains (5.26%) bacitracin susceptible (0.04U) beta hemolytic Streptococci group B were obtained. 11.53% of group F and 7.69% of the group G, hydrolyzed sodium hippurate. 100% of the isolations were sensible to penicillin and the second or third generation antibiotics. Considering the number of asymptomatic carriers of these microorganisms, it is necessary to apply some measures for their control.

Palabras clave : Streptococcus betahemolíticos; portadores; niños asintomáticos.