Streptococcus group B isolates in a regional hospital area

Medical Microbiology and Immunology
Y NitzanC Wajsman

Abstract

A survey of the frequency of group B streptococcal infections in the Sharon area (Israel) was done in this laboratory. In the female genital tract streptococcus group B was found in 11.8%. This microorganism was recovered in lower frequencies (1.6%-7.4%) in other infection sites (CSF, wounds, throat, blood, and urine). The streptococci were identified as belonging to group B by biochemical properties such as resistance to bacitracin and capability to hydrolyze hippurate. Later the isolates were classified serologically. Serotypes Ib, Ic, and II were predominant in the vaginal smears (25%-28% each serotype). In the other infection sites serotype Ib was the most frequent (36%). The isolates were sensitive to penicillin, cloxacillin, cephalothin, and erythromycin - M.I.C. 0.1-0.2 microgram/ml. Most of the isolates were resistant to tetracycline (69%) and some to chloramphenicol (17.5%). Synergism has been obtained in vitro using a combination of gentamicin and penicillin simultaneously. Group B streptococci or Streptococcus agalactiae first became known because of association with bovine mastitis. This microorganism is now widely appreciated as a potent human pathogen. In several geographic regions it is the leading cause of menin...Continue Reading

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