期刊
ANTIBIOTICS-BASEL
卷 11, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/antibiotics11070960
关键词
antimicrobial interaction; checkerboard microdilution method; fractional inhibitory concentration; zinc pyrithione; gentamicin
资金
- Centre for the investigation of synthesis and transformation of nutritional substances in the food chain in interaction with potentially harmful substances of anthropogenic origin: comprehensive assessment of soil contamination risks for the quality of agr [CZ.02.1.01/0.0/0.0/16_019/0000845]
- Czech University of Life Sciences Prague [IGA 20223102]
- project of the Ministry of Agriculture of the Czech Republic [MZeRO0718]
Bacterial skin diseases of livestock can be a serious global threat, and combination therapy with antimicrobial agents has been proven effective in overcoming bacterial resistance. This study found that zinc pyrithione in combination with gentamicin exhibited a strong synergistic effect against streptococcal strains, suggesting its potential use in the development of veterinary pharmaceutical preparations for the treatment of bacterial skin infections in livestock.
Bacterial skin diseases of livestock could be a serious global threat, especially in association with overcoming bacterial resistance. Combinatory action of antimicrobial agents proves to be an effective strategy to overcome the problem of increasing antibiotic resistance of microorganisms. In this study, the in vitro combined effect of zinc pyrithione with gentamicin against bacterial skin pathogens of livestock (Staphylococcus aureus, Streptococcus agalactiae, and Streptococcus dysgalactiae) was evaluated according to the sum of fractional inhibitory concentration indices (FICI) obtained by checkerboard method. The results showed that a combination of zinc pyrithione with gentamicin produced a strong synergistic effect (p < 0.001) against all tested streptococcal strains (with FICI values ranging from 0.20 to 0.42). Compared to that, only three out of eight S. aureus strains were highly susceptible to the combination of antimicrobial agents at single concentration (0.25 mu g/mL) of zinc pyrithione with range of FICI 0.35-0.43. These findings suggest that interference between agents tested in this study can be used for the development of future veterinary pharmaceutical preparations for the treatment of bacterial skin infections of livestock.
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