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In vitro antibiotic sensitivity of Pasteurella multocida
Health Laboratory Science
|October 1, 1976
Summary
Penicillin G showed the highest activity against Pasteurella multocida among 19 antibiotics. While some antibiotics were effective, erythromycin and lincomycins demonstrated poor activity against several strains tested.
Area of Science:
- Veterinary Microbiology
- Antimicrobial Resistance
Background:
- Pasteurella multocida is an important bacterial pathogen in veterinary medicine.
- Understanding antibiotic susceptibility is crucial for effective treatment of P. multocida infections.
Purpose of the Study:
- To evaluate the in vitro antimicrobial activity of 19 different antibiotics against 30 strains of Pasteurella multocida.
- To identify the most effective antibiotics for treating P. multocida infections.
Main Methods:
- Agar dilution method was employed to determine the minimum inhibitory concentrations (MICs) of 19 antibiotics.
- Thirty clinical isolates of Pasteurella multocida were tested.
Main Results:
- Penicillin G was the most potent antibiotic, exhibiting significant inhibitory activity.
- Anti-staphylococcal penicillins were less effective than Penicillin G.
- Tetracyclines, chloramphenicol, and cephalosporins inhibited P. multocida at low concentrations.
- Erythromycin and lincomycins showed poor activity against several strains.
- A narrow range of MICs was observed for most antibiotics, but disk diffusion tests showed considerable variation in zone sizes.
Conclusions:
- Penicillin G is a highly effective agent against Pasteurella multocida.
- Alternative antibiotics like tetracyclines, chloramphenicol, and cephalosporins may be considered, but resistance patterns should guide therapy.
- Erythromycin and lincomycins are not recommended for treating P. multocida infections based on this study.