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Susceptibility of Neisseria gonorrhoeae to pefloxacin
Abstract:
144 strains each of penicillinase producing (PPNG) and non-penicillinase producing (NPPNG) Neisseria gonorrhoeae were tested for susceptibility to pefloxacin. All isolates but one (99.65%) were susceptible to 0.06 mg/l. No significant difference was detected between the minimum inhibitory concentrations (MICs) of PPNG and NPPNG strains. The MIC50 and MIC90 of both types of strains were 0.015 mg/l and 0.06 mg/l respectively. Since pefloxacin was more effective than norfloxacin and rosoxacin against PPNG as well as NPPNG, it should prove useful in the therapy of gonorrhoea.
Insights
Pefloxacin demonstrates high efficacy against both penicillinase-producing and non-penicillinase-producing Neisseria gonorrhoeae. This fluoroquinolone antibiotic shows superior activity compared to norfloxacin and rosoxacin, suggesting its utility in gonorrhea treatment.
Area of Science:
- Microbiology
- Infectious Diseases
- Pharmacology
Background:
- Neisseria gonorrhoeae is a significant cause of sexually transmitted infections.
- The emergence of penicillinase-producing Neisseria gonorrhoeae (PPNG) strains poses a therapeutic challenge.
- Antimicrobial resistance in gonorrhea necessitates the evaluation of alternative treatment options.
Purpose of the Study:
- To assess the in vitro susceptibility of Neisseria gonorrhoeae strains to pefloxacin.
- To compare the efficacy of pefloxacin against penicillinase-producing (PPNG) and non-penicillinase-producing (NPPNG) strains.
- To evaluate pefloxacin's potential as a treatment for gonorrhea.
Main Methods:
- Tested 144 strains of PPNG and 144 strains of NPPNG Neisseria gonorrhoeae.
- Determined the minimum inhibitory concentrations (MICs) for pefloxacin.
- Compared MICs between PPNG and NPPNG strains and with other antibiotics like norfloxacin and rosoxacin.
Main Results:
- Over 99.65% of all tested Neisseria gonorrhoeae isolates were susceptible to pefloxacin at 0.06 mg/l.
- No significant difference in MICs was observed between PPNG and NPPNG strains.
- Pefloxacin exhibited greater effectiveness than norfloxacin and rosoxacin against both strain types.
Conclusions:
- Pefloxacin is highly effective against a broad range of Neisseria gonorrhoeae strains, including PPNG.
- The drug's potent activity suggests it is a promising therapeutic agent for gonorrhea.
- Further clinical evaluation of pefloxacin for gonorrhea treatment is warranted.