[Antibiotic sensitivity of streptococci of the A, B, C and G serogroups isolated in 1987-1990].
Antibiotic susceptibility of 1114 cultures of beta-hemolytic streptococci belonging to serogroups A, B, C and G was tested. The cultures were isolated from healthy and diseased children and adults. Group A, C and G streptococci were shown to be highly susceptible to beta-lactams, erythromycin, lincomycin, chloramphenicol and ristomycin. Erythromycin, lincomycin, ristomycin and ampicillin (a beta-lactam) proved to be the most active antibiotics against group B streptococci. Streptococci of the four groups had low susceptibility to tetracycline and especially gentamicin. The different antibiotic susceptibility of the streptococcal cultures isolated from the diseased and healthy children and adults is discussed.