Abstract | OBJECTIVE: 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.
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Authors | M Tanaka, J Kumazawa, T Matsumoto, I Kobayashi |
Journal | Genitourinary medicine
(Genitourin Med)
Vol. 70
Issue 2
Pg. 90-3
(Apr 1994)
ISSN: 0266-4348 [Print] England |
PMID | 8206482
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Ciprofloxacin
- Ofloxacin
- Norfloxacin
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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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