Du Preez J H
J S Afr Vet Assoc. 1987 Mar;58(1):9-14.
The International Dairy Federation's (IDF) criteria for classification of subclinical bovine health conditions does not provide a true picture of the health status of the udder. When combining these criteria with the serum albumin levels of milk samples, the IDF's classification of sub-clinical mastitis could be extended to include 8 possible conditions such as normal quarters, septic mastitis, aseptic mastitis, relevant and irrelevant teat canal infection, specific and unspecific hyperalbumingalactia and unspecific cellular reaction. When the bacteriological results of teat canal swab samples were combined with the IDF's standards, these conditions could be scaled down to 4 diagnoses which included normal quarters, aseptic mastitis, teat canal infections, subclinical mastitis and a combination of the latter 2 conditions. When applying the teat canal swabbing technique, up to 16% of quarters classified as normal and 10% as cases of aseptic mastitis according to the IDF's criteria in fact, have TCI. Since classification of the health status of quarters according to the IDF's criteria and with due regard to the bovine serum albumin values of milk, did not include the bacteriological results of the teat canal swab samples, further research must be done to clarify the existence of conditions in the IDF classification. Teat canal infections may result in damage to the udder parenchyma as manifested by the elevated bovine serum albumin content of milk.
国际乳品联合会（IDF）对亚临床奶牛健康状况的分类标准并不能真实反映乳房的健康状况。将这些标准与牛奶样本的血清白蛋白水平相结合时，IDF对亚临床乳腺炎的分类可扩展至包括8种可能的情况，如正常乳腺、化脓性乳腺炎、无菌性乳腺炎、相关和不相关的乳头管感染、特异性和非特异性高白蛋白血症以及非特异性细胞反应。当将乳头管拭子样本的细菌学结果与IDF的标准相结合时，这些情况可缩减为4种诊断，包括正常乳腺、无菌性乳腺炎、乳头管感染、亚临床乳腺炎以及后两种情况的组合。应用乳头管拭子技术时，根据IDF标准分类为正常的乳腺中，高达16%实际上存在乳头管感染，而分类为无菌性乳腺炎的病例中，10%存在乳头管感染。由于根据IDF标准并适当考虑牛奶中的牛血清白蛋白值对乳腺健康状况进行分类时，未纳入乳头管拭子样本的细菌学结果，因此必须开展进一步研究以明确IDF分类中各种情况的存在。乳头管感染可能会导致乳房实质受损，表现为牛奶中牛血清白蛋白含量升高。
