Nisin Z and lacticin 3147 improve efficacy of antibiotics against clinically significant bacteria

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Abstract

Aim: To determine if bacteriocins improve antibiotic efficacy. Materials & methods: Deferred antagonism assays identified bacteriocins with activity. Growth curves and time kill assays demonstrated bactericidal activity of antimicrobial combinations, and checkerboard assays confirmed synergy. Methicillin-resistant Staphylococcus aureus-infected porcine skin model determined ex vivo efficacy. Results: Subinhibitory concentrations of lacticin with penicillin or vancomycin resulted in complete growth inhibition of strains and the improved inhibitory effect was apparent after 1 h. Nisin with methicillin proved more effective against methicillin-resistant Staphylococcus aureus than either antimicrobial alone, revealing partial synergy and significantly reduced pathogen numbers on porcine skin after 3 h compared with minimal inhibition for either antimicrobial alone. Conclusion: Nisin Z and lacticin 3147 may support the use of certain antibiotics and revive ineffective antibiotics.

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Ellis, J. C., Ross, R. P., & Hill, C. (2020). Nisin Z and lacticin 3147 improve efficacy of antibiotics against clinically significant bacteria. Future Microbiology, 14(18), 1573–1587. https://doi.org/10.2217/fmb-2019-0153

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