STREPTOCOCCUS-MILLERI GROUP - RESULTS OF ISOLATES IN ONE OF MONTPELLIER HOSPITALS DURING 1990 - ORIGINS, BACTERIOLOGICAL CHARACTERISTICS, ANTIBIOTIC SUSCEPTIBILITY

Streptococcus ''milleri'' group is a relatively unrecognized bacteria by reason of properties of this group and resulting taxonomic confusio n. This group includes beta-hemolytic streptococci with different Lanc efield antigens, alpha or non hemolytic streptococci, microaerophilic streptococci or peptostreptococci. It is a commensal of the oropharynx , bowel, and genitourinary tract. Alone or in association, it has been implicated as a causative agent, in many types of severe infections a nd specially in purulent infections. In our laboratory, it was isolate d in 63 cases during 1990 : from cutaneous or soft tissues samples (15 strains), from osteo-articular system (10), from vagina (7), from per itoneal fluids (5), from blood cultures (4), the remainder from variou s samples including 2 isolate from urines with bacteriological signs o f infection. All strains were susceptible to penicillins and glycopept ides and showed low level resistance to aminoglycosides. With regard t o macrolides, lincosamides and synergistins (MLS), about 30 % of strai ns showed a MLSB type resistance. The activities of other molecules we re variable depending to the strain.