香芹酚
乳酸链球菌素
百里香酚
最小抑制浓度
最低杀菌浓度
微生物学
单核细胞增生李斯特菌
柠檬醛
化学
食品科学
细菌素
抗菌剂
生物
精油
细菌
抗菌剂
抗生素
遗传学
作者
Dongling Shi,Huixian Shi
摘要
This study was to investigate the synergistic antibacterial effect and inhibition of biofilm formation of nisin in combination with terpenes (carvacrol, cinnamaldehyde, citral and thymol) against Listeria monocytogenes. The bactericidal ranking of terpenes combined with nisin was carvacrol > cinnamaldehyde, citral > thymol. The minimum inhibitory concentration (MIC) of nisin and carvacrol when used together was determined to be 0·1563 mg ml-1 + 0·0195 mg ml-1 (nisin at MIC/2 + carvacrol at MIC/16). The addition of nisin at MIC/2 + carvacrol at MIC/2 caused more decrease in membrane potential than carvacrol or nisin at MIC individually. The decrease rates of hlyA and plcA gene expressions caused by nisin at MIC/2 + carvacrol at MIC/2 were significantly higher than those caused by carvacrol or nisin at MIC individually (P < 0·05). Nisin combined with carvacrol showed the highest inhibition activity to the formation of L. monocytogenes biofilm on stainless steel and lettuce. The inhibition effect of nisin at MIC/2 + carvacrol at MIC/16 was significantly higher than that of nisin at MIC/2 and carvacrol at MIC/16 (P < 0·05).
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