Resistance and Serotype of Streptococcus Pneumoniae in Zhongshan City

Objective This study is designed to investigate bacterial resistance and the prevalence of serotype of Streptococcus pneumoniae. Methods Sensitivity to penicillin, cefotaxime, erythromycin, tetracycline, chloramphenicol, clindamycin, ofloxacin, Rifampin, vancomycin and trimethoprim-sulfamiethoxazole was determined by K-B and E-test methods according to NCCLS. Serotyping of the Streptococcus Pneumoniae strains was performed by using Quelling Reaction. Result Resistance of 266 species Streptococcus Pneumoniae were as follows: Penicillin, 26.7 %(22.9% intermediate; 3.8% resistant); erythromycin, 65.4%; tetracycline, 51.7%; chloramphenicol, 45.8%; clindamycin, 53.0%; cefotaxime, 5.0%; Rifampin, 36.5%; ofloxacin, 1.5%; vancomycin, 0% and trimethoprim-sulfamiethoxazole, 66.5%. Serotype 23 F ( 13.2% ),6 A (12.4%),19 F (10.9%),6 B (7.1%),14 (6.4%),15 B (5.3%),NT(5.3%),19 A (3.0%),22 F (2.3%) were most common. Conclusion These data show that carriage of antibiotic-resistant pneumococcal is high in Zhongshan city. Erythromycin, Tetracycline, Chloramphenicol, Clindamycin and Trimethoprim-sulfamiethoxazole resistance was very common. All strains were susceptible to Vancomycin. This study showed that Pneumococcal Vaccine Polyvalent did cover the majority of strains isolated.