Related Experiment Videos
Evaluation of pefloxacin in experimental Escherichia coli meningitis
Abstract:
The therapeutic efficacy of the fluoroquinolone pefloxacin mesylate was compared with those of cefotaxime and chloramphenicol in a rabbit model of Escherichia coli meningitis. The mean percent penetration (+/- the standard deviation) of pefloxacin (range, 1 to 30 mg/kg per h) into cerebrospinal fluid of infected rabbits was 51.3 +/- 14.0 compared with 11.1 +/- 1.0 for cefotaxime (100 mg/kg per h) and 22.3 +/- 1.5 for chloramphenicol (60 mg/kg per h). The rate of bacterial killing (delta log10 CFU/ml per h) did not change over a dosage range of 1 to 15 mg/kg per h (-0.37 +/- 0.15, 20% sterile). At 30 mg/kg per h, the rate achieved (-0.77 +/- 0.18, 100% sterile) was comparable to that of cefotaxime (-0.88 +/- 0.23, 100% sterile) and superior to that of chloramphenicol (-0.10 +/- 0.14, 0% sterile).
Insights
Pefloxacin mesylate demonstrated superior cerebrospinal fluid penetration and comparable bacterial killing rates in rabbit meningitis models. This fluoroquinolone shows promise for treating bacterial meningitis.
Area of Science:
- Pharmacology
- Infectious Diseases
- Microbiology
Background:
- Bacterial meningitis remains a significant cause of morbidity and mortality worldwide.
- Effective treatment requires antibiotics with adequate penetration into the cerebrospinal fluid (CSF).
- Fluoroquinolones are a class of antibiotics with broad-spectrum activity.
Purpose of the Study:
- To compare the therapeutic efficacy of pefloxacin mesylate, cefotaxime, and chloramphenicol in a rabbit model of Escherichia coli meningitis.
- To evaluate the penetration of these antibiotics into the CSF.
- To assess their bacterial killing rates in the context of meningitis treatment.
Main Methods:
- A rabbit model of Escherichia coli meningitis was established.
- Pefloxacin mesylate, cefotaxime, and chloramphenicol were administered at various dosages.
- Cerebrospinal fluid penetration and bacterial killing rates were quantified.
Main Results:
- Pefloxacin mesylate exhibited significantly higher CSF penetration (51.3%) compared to cefotaxime (11.1%) and chloramphenicol (22.3%).
- At higher doses (30 mg/kg/h), pefloxacin achieved bacterial killing rates comparable to cefotaxime and superior to chloramphenicol.
- Bacterial killing rates for pefloxacin showed dose-dependent improvement, reaching 100% sterility at 30 mg/kg/h.
Conclusions:
- Pefloxacin mesylate demonstrates excellent penetration into the CSF, suggesting potential for treating bacterial meningitis.
- The fluoroquinolone pefloxacin mesylate offers a promising therapeutic option for Escherichia coli meningitis.
- Further clinical investigation is warranted to confirm the efficacy of pefloxacin in human meningitis cases.