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High prevalence of Neisseria gonorrhoeae strains with reduced susceptibility to fluoroquinolones in Japan.

AbstractOBJECTIVE:
To study the antibiotic susceptibility of Neisseria gonorrhoeae strains isolated in Japan and, in particular, to examine the possibility of emerging fluoroquinolone resistance.
MATERIALS AND METHODS:
Sixty-nine strains of Neisseria gonorrhoeae isolated in 1992 were tested for susceptibility to 15 antibiotics including fluoroquinolones and were seroclassified. Twenty-seven strains isolated from 1981 to 1984 were also evaluated as controls.
RESULTS:
The MIC90 values of norfloxacin, ofloxacin, and ciprofloxacin against the isolates from 1992 were 2.0, 1.0, and 0.5 microgram/ml, respectively. The MIC90 values of norfloxacin, ofloxacin, and ciprofloxacin against the isolates from 1981-84 (controls) were 0.25, 0.125, and 0.063 microgram/ml, respectively. These results indicate that the MIC90 values of norfloxacin, ofloxacin, and ciprofloxacin against the strains from 1992 were 8-fold higher than those against the strains from 1981-84. However, there were no significant differences in susceptibility to beta-lactams, tetracyclines, macrolides, and spectinomycin between the isolates from 1992 and those from 1981-84. The majority of the isolates belonged to the WII/WIII serogroup. There was no relationship between fluoroquinolone resistance and serogroup.
CONCLUSIONS:
Fluoroquinolones have been used frequently as first-line therapy and have provided excellent clinical efficacy for gonococcal infections for the last several years in Japan. However, our data indicate that a rapid decrease in the susceptibility of Neisseria gonorrhoeae to fluoroquinolones is occurring in our country.
AuthorsM Tanaka, J Kumazawa, T Matsumoto, I Kobayashi
JournalGenitourinary medicine (Genitourin Med) Vol. 70 Issue 2 Pg. 90-3 (Apr 1994) ISSN: 0266-4348 [Print] England
PMID8206482 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Ciprofloxacin
  • Ofloxacin
  • Norfloxacin
Topics
  • Chi-Square Distribution
  • Ciprofloxacin (pharmacology)
  • Drug Resistance, Microbial
  • Gonorrhea (microbiology)
  • Humans
  • Male
  • Microbial Sensitivity Tests
  • Neisseria gonorrhoeae (classification, drug effects)
  • Norfloxacin (pharmacology)
  • Ofloxacin (pharmacology)
  • Serotyping
  • Urethritis (microbiology)

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