Rodriguez Jose L, Gava Pilar, Medina Margarita, Nuñez Manuel
Departamento de Tecnología de Alimentos, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Carretera de La Coruña Km 7, 28040 Madrid, Spain.
J Food Prot. 1994 Jul;57(7):571-575. doi: 10.4315/0362-028X-57.7.571.
Ewes' milk samples from 287 farm bulk tanks and 17 transport tankers were analyzed for Listeria over a one-year period. Listeria monocytogenes and Listeria innocua were detected in 2.19% and 2.00% of 1052 farm samples, and in 18.38% and 11.76% of 136 tanker samples, respectively. Incidence of Listeria grayi , Listeria ivanovii , Listeria seeligeri and Listeria welshimeri was under 0.4% in farm samples and under 1% in tanker samples. Most farms (93.38%) produced milk free from L. monocytogenes throughout the one-year sampling period. No seasonal influence on milk contamination by Listeria was found. However, ewes' milk contamination by L. monocytogenes and other Listeria spp. was significantly higher in farms where cows were also reared than in farms where only ewes were present.
在一年时间里，对来自287个农场储奶罐和17辆运输罐车的母羊乳样本进行了李斯特菌分析。在1052个农场样本中，分别有2.19%和2.00%检测到单核细胞增生李斯特菌和无害李斯特菌，在136个罐车样本中，分别有18.38%和11.76%检测到这两种菌。格氏李斯特菌、伊氏李斯特菌、斯氏李斯特菌和威氏李斯特菌在农场样本中的发生率低于0.4%，在罐车样本中的发生率低于1%。在为期一年的采样期内，大多数农场（93.38%）生产的牛奶不含单核细胞增生李斯特菌。未发现李斯特菌对牛奶污染有季节性影响。然而，在同时饲养奶牛的农场中，母羊乳被单核细胞增生李斯特菌和其他李斯特菌属污染的情况明显高于只饲养母羊的农场。
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