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《China Public Health》 2004-11
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Investigation on survival of escherichia coli O_(157):H_7 in eight kinds of food

XU Neng-feng,CHEN Jin-hui,FENG Jie-rong, et al.Department of Epidemiology and Health Statistics,Fujian Medical University(Fuzhou,350004,China)  
Objective To investigate the survival of escherichia coli O 157 :H7 in eight kinds of food.Methods Eight kinds of food were collected and contaminated by the bacterial suspension of EHEC O 157:H 7 933 strain,the count of contaminated bacteria was 7 log 10?cfu/ml·g.Then the survival of E.coli O 157 :H 7 was observed experimentally at certain temperature (4,25℃) .Results E.coli O 157 :H 7 lived longer (70 days) in animal food than other food.The trend of bacterial survival number rose firstly and then dropped.The bacteria both proliferated 1-2 log10?cfu/ml·g at two kinds of temperature and decreased logarithmically after reaching the peak.The bacterial count was still 3-6 log 10?cfu/ml·g after 42 days.The bacteria lived comparatively short (2-5 days in orange juice,10-27 days in lactic drink).The bacterial count rapidly decreased to 0 when it cut down on 4 log10?cfu /ml·g.E.coli O 157 :H 7 was found intermittently in both the strawberry jam and the apple jam.Conclusion E.coli O 157 :H 7 had strong survival in ordinary food.The major measure to prevent and control its infection was to strengthen the sanitary administration of food,especially animal food,and beverage.
【Fund】: 福建省教育委员会科研基金资助 (JA970 86)
【CateGory Index】: R155
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