Objective To study the antibiotic resistance of Neisseria gonorrhoeae and the prevalence of penicillinase-producing Neisseria gonorrhoeae (PPNG) and high-level tetracycline resistant Neisseria gonorrhoeae (TRNG) in Nanning. Methods Minimum inhibitory concentrations (MIC) were determined by agar dilution method and ?-lactamase production was comfirmed by acidometric method.Results Among 458 strains, 33 strains(7.20%) were found to be PPNG and 231 strains(50.44%) were TRNG. The resistance rate to ciprofloxacin, ceftriaxone and spectinomycin were 87.33%, 1.31% and 0.22% respectively. Conclusion The situation of resistance to ciprofloxacin was very serious, and it was also found that a few of gonococcal isolates were resistant to ceftriaxone and spectinomycin. The study showed that it is important to successively survey the antibiotic resistance of Neisseria gonorrhoeae.

Objective To determine the prevalence and genotype profiles of urogenital Chlamydia trachomatis and their related factors in patients attending sexually transmitted diseases (STD) clinics in Guangxi Zhuang Autonomous Region. Methods C. trachomatis was screened by a plasmid PCR in 598 patients attending STD clinics. Then, positive specimens underwent nested-PCR to amplify the major outer membrane protein 1 (ompl) gene. The amplicons of ompl gene were digested by restriction endonucleases Alu I plus Hinf I and Cfol . C. trachomatis was differentiated according to the restriction fragment length polymorphism (RFLP) patterns. Results Out of the 598 samples, 83 were positive for plasmid-PCR. The prevalence of chlamydial infection was 13.9% with no significant difference between male and female patients. Nested-PCR based RFLP analysis showed that genotype E amounted to 27.7% (23/83), F 20.5% (17/83), D 13.2%(11/83), G 12.0%(10/83), K 7.2%(6/83), H 4.8%(4/83), I 3.6% (3/83), J 3.6%(3/83)and uncertain types 7.2% (6/83). Visible symptoms were observed less frequently in infections with C. trachomatis genotypes E and F compared with the other genotypes, while low abdominal pain occurred in 80% of infections with type G. Conclusions A certain proportion of out-patients attending STD clinic are infected with various types of C. trachomatis in Guangxi Zhuang Autonomous Region. The polymorphism of ompl gene may serve as a useful tool in molecular epidemiological studies of C. trachomatis.