Abstract The microbiological quality of colostrum and identify cow, calf and farm managemental factors associated with colostrum hygiene in Colombian dairy herds were determined. Colostrum samples (n = 255) from 44 herds were collected for bacteriological quality analysis. A survey about colostrum management was carried out for each birth event. Only 18% of the samples exceeded the threshold 100,000 cfu mL−1 for the total bacterial count (TBC), and more than 54.5% of the herds have at least one colostrum sample above the TBC threshold. The total coliform count was higher than the threshold 10,000 cfu mL−1 in 24.3% of colostrum samples and 68.2% of herds. Associations between cow-calf factors and the colostrum hygiene were examined. The two-level logistic regression showed that the colostrum microbiological quality was influenced by suckling colostrum from mother, feeding colostrum with a bottle and when the colostrum came of large herds.

中文翻译：

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与哥伦比亚奶牛群牛初乳微生物质量相关的因素

摘要 确定了与哥伦比亚奶牛群初乳卫生相关的初乳微生物质量和识别奶牛、犊牛和农场管理因素。收集了来自 44 个牛群的初乳样品 (n = 255) 用于细菌学质量分析。对每个出生事件进行了关于初乳管理的调查。只有 18% 的样本超过了总细菌计数 (TBC) 的阈值 100,000 cfu mL-1，并且超过 54.5% 的牛群至少有一个初乳样本高于 TBC 阈值。在 24.3% 的初乳样品和 68.2% 的牛群中，大肠菌总数高于阈值 10,000 cfu mL-1。检查了牛犊因素与初乳卫生之间的关联。