Study of bacteria isolated from infections of the oral and maxillofacial region

One hundred nineteen patients with obstructed abscesses in the oral and maxillofacial region were studied bacteriologically.Isolates of Streptococcus were identified in detail, and their antimicrobial susceptibilities were assessed. The bacteriologic results suggested that the Streptococcus milleri group including Streptococcus constellatus was the most frequently isolated species of the genus Streptococcus. As for the results of antimicrobial susceptibility, no bacteria was resistant to β-lactam agents. However, we recognized various susceptibity patterns to cephems. Almost all isolates of Streptococci showed good susceptibility to erythromycin, minocycline, and clindamycin, but a few were resistant to these agents. Levofloxacin was less active than other agents.