동물유래 생식품, 사료 및 동물 분변중 listeria monocytogenes의 분포와 분리균의 특성에 관한 연구 2. 牛體表 및 silage에서 L. monycytogenes의 分離

Characteristics of Isolates and Incidence of Listeria monocytogenes in Faeces from Animals, in Feeds and in Raw Foods of Animal Origin 2. Incidence of Listeria monocytogenes in Cow Skin and in Silage

A total of 277 specimens from cow skin, Korean native cattle skin, silage, bulk milk and cow feces were examined for the incidence of Listeria species. The bacterial isolates was selected on LiCl-phenylethanol-moxalactam agar plates after the cold enrichment in FDA-EB at 4℃ for 7 days and identified by several biochemical, mobility, and CAMP test. Prevalence of L. innocua was found to be 58.6% in cow feces, 17.1% in corn silage, 13.3% in Korean native cattle skin, 5.9% in cow skin, and 4.0% in bulk milk. L. monocytogenes was isolated from 4.3% in corn silage and 2.0% in cow skin but was not found in the skin and feces of cattle, and bulk milk specimens. Of 10 L. monocytogenes isolated, 7 strains were classified into serotype 4, and 3 strains was untypable.