Farber J M, Sanders G W, Malcolm S A
Health and Welfare Canada, Health Protection Branch, Ottawa, Ont.
Can J Microbiol. 1988 Feb;34(2):95-100. doi: 10.1139/m88-020.
Raw milk samples from bulk tanks in Ontario were analyzed for the presence of Listeria species. The overall incidence of Listeria species in raw milk was 12.4%. Listeria innocua was most frequently isolated and was found in 9.7% (43/445) of the raw milk samples, while L. monocytogenes and L. welshimeri were each found in 1.3% (6/445) of the samples. No other species of Listeria was found. Of five regions in Ontario that were examined, the eastern region had a significantly higher incidence rate of Listeria species than the western, northern, or northwestern regions. There was also a significantly lower incidence rate of Listeria species in winter than in the other three seasons. A comparison of several cold enrichment and shortened enrichment procedures demonstrated that no single procedure was totally satisfactory in isolating Listeria species.
对安大略省大容量奶罐中的生鲜乳样本进行了李斯特菌属检测。生鲜乳中李斯特菌属的总体检出率为12.4%。无害李斯特菌分离频率最高，在9.7%（43/445）的生鲜乳样本中被检出，而单核细胞增生李斯特菌和威氏李斯特菌在1.3%（6/445）的样本中被检出。未发现其他李斯特菌属。在安大略省接受检查的五个地区中，东部地区李斯特菌属的发病率明显高于西部、北部或西北部地区。冬季李斯特菌属的发病率也明显低于其他三个季节。对几种冷增菌和缩短增菌程序的比较表明，没有一种单一程序在分离李斯特菌属方面是完全令人满意的。
