Streptococcus spp. em faringotonsilite aguda recorrente: frequência e perfil de susceptibilidade a antimicrobianos

Abstract

The aim of this study was to determine the frequency and the antimicrobial susceptibility profile of Streptococcus spp. obtained from recurrent acute pharyngo-tonsillitis. For this study, tonsils from 122 patients ranging from 3 to 38 years old (66 males and 56 females) were collected. All patients had a history of recurrent acute pharyngo-tonsillitis associated with tonsillar hypertrophy and were submitted for tonsillectomy at a teaching hospital. After isolation and identification, antimicrobial susceptibility tests were performed. A hundred and fifty one isolates of Streptococcus spp. were obtained from tonsils, consisting of 41.06% non-hemolytic Streptococcus viridans group, 39.07% a-hemolytic Streptococcus viridans group, 7.30% Streptococcus of C, F or G groups, 5.30% β-hemolytic Streptococcus spp., 4.63% non-hemolytic Streptococcus spp., 1.32% a-hemolytic Streptococcus spp. and 1.32% group A β hemolytic Streptococcus. Some of the isolates were resistant to beta-lactamic antibiotics. The study showed that components of the oropharynx microbiota presented resistance to drugs commonly used to treat pharyngo-tonsillitis infections. Correct diagnosis would improve treatment and could prevent recurrent infections.