a study of streptococcus viridans in the maxillofacial region

statement of problem: streptococcus viridans is one of the most important micro-organisms in the establishment of infections leading to dental caries and heart valve damages. therefore the diagnosis and prevention of these infections is critical in health care. purpose: the aim of this in-vivo study was to determine the prevalence of viridans streptococci in abscesses occurring in the maxillofacial region. materials and methods: the study sample consisted of 39 patients with maxillofacial abscesses, referred to the department of oral surgery faculty of dentistry tehran university of medical sciences and dr. shariati hospital, tehran university of medical sciences. extra-oral incision, drainage and pus collection followed by culture, staining and biochemical and sugar fermentation tests were carried out for all participants. results: in the present study %53.84 and 46.16% of the patients had negative and positive culture results, respectively. in the positive culture group, %2.5 of the viridans streptococci were streptococcus salivarius, %4.6 streptococcus sanguis and %17.9 were streptococcus mutans. conclusion: the findings of this study showed that viridans streptococci are an important factor in the development of metastatic and maxillofacial infections which can pose a significant threat to the patient’s life.