Fitzpatrick Sarah Rose, Garvey Mary, Flynn Jim, Jordan Kieran, Gleeson David
Teagasc, Animal & Grassland Research and Innovation Centre, Moorepark, Fermoy, County Cork, Ireland.
Cellular Health and Toxicology Research Group, Institute of Technology Sligo, County Sligo, Ireland.
Acta Vet Scand. 2019 Apr 25;61(1):21. doi: 10.1186/s13028-019-0455-3.
The use of pre- and post-milking teat disinfectants can reduce teat bacterial load and aid in the collection of high-quality milk. The objective of this study was to compare the reduction in bacteria populations on teat skin after the application of different commercial teat disinfectant products. Ten teat disinfectant products were applied to the teats of 10 Holstein-Friesian cows. One cow received one teat disinfectant product at each sampling point before cluster application for milking. A composite swab sample was taken of the 4 teats of each cow before and after teat disinfectant application. Swab samples were placed on three different selective agars to enumerate bacterial counts of staphylococcal, streptococcal and coliforms isolates on teat skin. Staphylococcal isolates were the most prominent bacterial group recovered on teat swabs (49%), followed by streptococcal (36%) and coliform (15%) isolates before the application of disinfectant. The average bacterial reductions on teat skin were shown to be 76%, 73% and 60% for staphylococcal, streptococcal and coliform isolates, respectively. All of the teat disinfectant products tested reduced teat bacterial load for all three bacterial groups. Product 4 containing 0.6% w/w diamine was the most effective against bacterial populations of staphylococcal and streptococcal isolates on teat skin with a reduction of 90% and 94%, respectively. Whereas product 10, which contained 0.5% w/w iodine, resulted in the highest reduction in coliforms on teat skin with a reduction of 91%. Results from this study suggest that specific bacterial population loads on teats can be reduced using different teat disinfectant formulations.
挤奶前后使用乳头消毒剂可以减少乳头细菌载量，并有助于采集高质量的牛奶。本研究的目的是比较不同商业乳头消毒剂产品应用后乳头皮肤上细菌数量的减少情况。将十种乳头消毒剂产品应用于10头荷斯坦-弗里生奶牛的乳头。在连接挤奶器进行挤奶前的每个采样点，每头奶牛使用一种乳头消毒剂产品。在应用乳头消毒剂前后，对每头奶牛的4个乳头采集复合拭子样本。将拭子样本置于三种不同的选择性琼脂上，以计数乳头皮肤上葡萄球菌、链球菌和大肠菌群分离株的细菌数量。在应用消毒剂前，葡萄球菌分离株是乳头拭子上检出的最主要细菌群体（49%），其次是链球菌（36%）和大肠菌群（15%）分离株。乳头皮肤上葡萄球菌、链球菌和大肠菌群分离株的平均细菌减少率分别为76%、73%和60%。所有测试的乳头消毒剂产品均能降低所有三个细菌群体的乳头细菌载量。含有0.6%（w/w）二胺的产品4对乳头皮肤上葡萄球菌和链球菌分离株的细菌群体最有效，减少率分别为90%和94%。而含有0.5%（w/w）碘的产品10对乳头皮肤上大肠菌群的减少率最高，为91%。本研究结果表明，使用不同的乳头消毒剂配方可以降低乳头特定细菌群体的载量。
