Sergelidis D, Abrahim A, Sarimvei A, Panoulis C, Karaioannoglou P, Genigeorgis C
Department of Food Hygiene and Technology, Veterinary School, Aristotelian University, Thessaloniki, Greece.
Int J Food Microbiol. 1997 Feb;34(2):171-7. doi: 10.1016/s0168-1605(96)01175-0.
The present paper examined the presence of Listeria spp. in the environment of domestic, retail and industrial refrigerators. From 136 household refrigerators, 136 surface samples were taken from the walls or shelves, and 125 from cheese compartments. Only two refrigerators harboured L. monocytogenes. From 228 food store refrigerators, 335 samples were taken. Of these, 118 were in in contact with cheeses, 69 with sausages, 21 with cheese and sausages, 20 with miscellaneous products and 107 from refrigerator handles. Listeria spp. and L. monocytogenes were found in 3.1% and 1.7%, of the samples respectively. Listeria spp. was not detected in any of the nine dairy plant refrigerators examined. Listeria monocytogenes and L. innocua were found in 4.5 and 36.4%, respectively, of the 22 refrigerators inside meat processing plants, with only one of 22 refrigerators handles being positive for L. monocytogenes. Temperature distribution in the refrigerators was also investigated. Fifty five per cent of the 136 domestic and 32% of the 228 retail store refrigerators had temperatures of greater than or equal to 9 degrees C. The range of refrigeration temperatures of the industrial refrigerators was 0-2 degrees C for meat plants and 2-7 degrees C for dairy plants. No correlation of any kind could be established between the prevalence of Listeria spp. and the temperature of the various refrigerators due to the low number of positive samples.
本文研究了家庭、零售和工业用冰箱环境中李斯特菌属的存在情况。从136台家用冰箱中，采集了136份来自冰箱壁或搁板的表面样本，以及125份来自奶酪隔层的样本。只有两台冰箱中检测到单核细胞增生李斯特菌。从228台食品店冰箱中，采集了335份样本。其中，118份与奶酪接触，69份与香肠接触，21份与奶酪和香肠接触，20份与其他产品接触，107份来自冰箱把手。分别在3.1%和1.7%的样本中检测到李斯特菌属和单核细胞增生李斯特菌。在所检测的9台乳制品厂冰箱中，均未检测到李斯特菌属。在肉类加工厂内的22台冰箱中，分别有4.5%和36.4%的冰箱检测到单核细胞增生李斯特菌和无害李斯特菌，22台冰箱的把手样本中只有1份单核细胞增生李斯特菌呈阳性。还对冰箱内的温度分布进行了调查。136台家用冰箱中有55%、228台零售商店冰箱中有32%的温度大于或等于9摄氏度。肉类加工厂工业冰箱的制冷温度范围为0至 2摄氏度，乳制品厂为2至7摄氏度。由于阳性样本数量较少，无法确定李斯特菌属的流行率与各类冰箱温度之间存在任何相关性。
