A Surveillance Study on Distribution of Types & Antibiotic Resistance of Shigellae in Xihua County 1985-1995

strains of Shigella isolated from feces of diarrheal patients in Xihua County 1985-1995 were identified by biochemical and serological methods.And the antibiotic resistance was detected by using K B method as well. The results indicated that all the 354 strains were identified as 17 serotypes of 4 groups of Shigella.The main epidemic group was group B (68.34%),only 5.93% of the strains were ideutified as group D.The value of average ratio of B∶D was 11.52,it was significantly higher than the national mean level.The main epidemic type of Group B was F4.The result of antibiotic resistance test indicated that resistance rates in proper order were as follows:cephalothin,cephazolin,erythromycin.and amicilin.The antibiotic resistance of the stains were increased gradually.Most of strains were sensitive to cosmz,neomycin and chloramp0honicol.90% of the strains were highly sensitive to polymycin B. ofloxacin and gentamicin.