Inhibition of MRSA and of Clostridium difficile by durancin 61A: synergy with bacteriocins and antibiotics

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Aim: The aim of this study was to evaluate the efficacy of durancin 61A alone or in combination with nisin, pediocin PA-1, reuterin, microcin J25, vancomycin or tetracycline as an inhibitor of resistant clinical pathogens and to shed light on its mode of action. Results: Durancin and reuterin were effective inhibitors of Clostridium difficile, vancomycin-resistant Enterococcus faecium and methicillin-resistant Staphylococcus aureus. The combination of durancin and reuterin was highly synergistic against C. difficile (fractional inhibitory concentration index = 0.2). Durancin/vancomycin combination was synergistic against S. aureus ATCC® 700699 (fractional inhibitory concentration index = 0.3).

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