Title: Serotypes and Antibiotic Sensitivity of Hemolytic Streptococci Isolated from Clinical Specimens in Hiroshima Prefecture, 1987-1989
Abstract: The grouping, the typing and the drug-sensibility of hemolytic streptococci isolated from the clinical specimens taken from 4 medical centers in Hiroshima Prefecture have been examined and reviewed during the past 3 year 1987-1989. The results were summarized in this report.1. Of 1572 strains of hemolytic streptococci, 844 strains (53.7%) were group A; 539 strains (34.3%), group B; 14 strains (0.9%), group C; 82 strains (5.2%), group G; and 93 strains (5.9%), the others. We found that group A and group B were predominant, and the incidence rate of group B was higher than it used to be.2. The prevalent types were T-4 (37.9%), T-1 (13.6%), T-12 (12.0%), and T-28 (10.7%) in group A, while Ia (26.2%), M9 (provisional type 18.4%), and III (14.5%) in group B.3. As for as the detection data of each month is concluded, during the summer season we could hardly detect group A which peak of occurrence during the winter season. These findings were really consistent with the occurrence pattern of those patients who suffered from streptococcal infectious disease. But this occurrence pattern couldn't be found in group B.4. In our study, the positive frequence was throat swab>urine>sputum>vaginal swab>pus>ear secretion in order. Group A was mainly isolated from throat swab, while group B, from several specimens including urine.5. We found that there was a high drug-sensibility to the j3-lactum drugs in all strains except for 3 strains of group B which were resistant to CEX. Considering the correlation between the typing and the drug resistant pattern, we concluded that the types resistant to the TC mono-drug were often recognized in T-4, T-13 of group A, and those resistant not only to the TC mono-drug, but also to theTC·CP 2-drugs were in T-11 of group A.