Sites of infection associated with Streptococcus anginosus group among children
Abstract
Streptococcus anginosus group (SAG) are parts of normal flora of the oral cavity and associated with abscess forming in various sites on the body. Although the clinical features of infections caused by each member of the SAG in adults has been reported, it has not well been known in children. The aim of this study was to clarify the site of infections associated with individual SAG species among children. Medical records from March 2010 to July 2016 were reviewed at Tokyo Metropolitan Children's Medical Center. Any SAG species (S. anginosus, S. constellatus, or S. intermedius) isolated from clinical samples and recorded in the microbiological database were included for analysis. Analysis of 52 infectious episodes found that S. anginosus was most frequently isolated from the genitourinary tract, and 73% of genitourinary tract infection was balanoposthitis. All genitourinary tract infections were associated with S. anginosus. These findings were different from those of a previous study of adults. Of all the patients, 45 patients (87%) had polymicrobial infections. More than 70% of patients infected by S. anginosus and S. constellatus were co-infected by obligate anaerobes, in comparison with only 21% of S. intermedius cases. Among the obligate anaerobes species, Bacteroides spp. was significantly accompanied with S. anginosus. Susceptibility to penicillin, ampicillin, cefotaxime, erythromycin, clindamycin, levofloxacin, and vancomycin was 100%, 100%, 100%, 77%, 89%, 97% and…
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