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乳酸菌对肠出血性大肠杆菌O157:H7抑制作用的研究
引用本文:李志刚,杨宝兰,徐进.乳酸菌对肠出血性大肠杆菌O157:H7抑制作用的研究[J].中国食品卫生杂志,2003,15(4):298-301.
作者姓名:李志刚  杨宝兰  徐进
作者单位:中国疾控中心营养与食品安全所,北京,100021
摘    要:为探讨乳酸菌对肠出血性大肠杆菌O157:H7 ATCC43895(E.Coli O157:H7)的抑制作用,在培养基上进行了研究。将E.Coli O157:H7与干酪乳杆菌干酪亚种、植物乳杆菌、发酵乳杆菌、乳酸乳球菌和瑞士乳杆菌同时接种在培养基中,E.Coli O157:H7的活性不受影响;将E.Coli O157:H7接种到培养了24h的乳酸茵培养液中,E.Coli O157:H7活性显下降。以乳酸调整的低pH值对E.Coli O157:H7有一定的杀灭作用。本研究表明:乳酸菌的代谢产物乳酸对E.Coli O157:H7有杀灭作用。

关 键 词:乳酸菌  肠出血性大肠杆菌O157:H7  抑制作用  培养基  接种  杀灭作用  发酵乳制品
文章编号:1004-8456(2003)04-0298-04
修稿时间:2003年5月6日

Inhibition of the growth of Escherichia coli O157:H7 by Lactic acid bacteria
Li Zhigang,et al..Inhibition of the growth of Escherichia coli O157:H7 by Lactic acid bacteria[J].Chinese Journal of Food Hygiene,2003,15(4):298-301.
Authors:Li Zhigang  
Abstract:An experiment was performed to study the inhibition effect of Lactic acid bacteria on the growth of Escherichia coli O157:H7. When L.casei subsp.cacei, L.plantarum, L.fermentium, Lactococccus lactis and L.helveticus were respectively mixed with E.Coli O157:H7 ATCC43895 and cultured,each of the 5 strains of Lactic acid bacteria had no inhibitive effect on the survival of E.Coli O157:H7 ATCC43895. When E.Coli O157:H7 ATCC43895 was inoculated into the 24 h-old Lactic acid bacteria MRS culture, the E.Coli O157:H7 ATCC43895 lost all its activity. The low pH(pH4) adjusted by lactic acid had substantial inactivating effect on Escherichia coli O157:H7. The study showed that the acidic metabolites of Lactic acid bacteria inhibited the activity of Escherichia coli O157:H7.
Keywords:Escherichia coli O157:H7  Lactic acid bacteria  inhibition  
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