Oliver S P, Lewis M J, Ingle T L, Gillespie B E, Matthews K R
Department of Animal Science, University of Tennessee, Knoxville 37901-1071.
J Dairy Sci. 1993 Jan;76(1):287-92. doi: 10.3168/jds.S0022-0302(93)77348-8.
The objective of this study was to evaluate the efficacy of a premilking teat disinfectant for the prevention of mastitis in dairy cows under natural exposure conditions. Predipping was compared with a negative control using a split udder experimental design. All teats were dipped after milking with the same teat dip. Percentage of quarters newly infected by major mastitis pathogens was 34% lower in quarters with teats predipped and postdipped than in quarters with teats postdipped only. New IMI by Streptococcus uberis and Staphylococcus aureus were significantly lower in quarters with teats predipped and postdipped than in quarters with teats postdipped only. Differences in incidence of clinical mastitis between treatment groups approached significance. Predipping and postdipping were no more effective against Gram-negative bacteria, coagulase-negative Staphylococcus species, and Corynebacterium bovis than postdipping only. No chapping or irritation of teats was observed, and no adverse effects were noted using the test product as a premilking and postmilking teat disinfectant. Results of this study suggest that predipping and then postdipping with the test product was a more effective procedure against major mastitis pathogens than postdipping only.
本研究的目的是评估一种挤奶前乳头消毒剂在自然暴露条件下预防奶牛乳腺炎的效果。采用分侧乳房实验设计，将预浸与阴性对照进行比较。所有乳头在挤奶后均使用相同的乳头浸液进行浸渍。与仅进行挤奶后浸液处理的乳头相比，经过预浸和挤奶后浸液处理的乳头所在乳腺区新感染主要乳腺炎病原体的比例低34%。与仅进行挤奶后浸液处理的乳头相比，经过预浸和挤奶后浸液处理的乳头所在乳腺区由乳房链球菌和金黄色葡萄球菌引起的新隐性乳房炎感染率显著更低。各治疗组之间临床乳腺炎发病率的差异接近显著水平。与仅进行挤奶后浸液处理相比，预浸和挤奶后浸液处理对革兰氏阴性菌、凝固酶阴性葡萄球菌和牛棒状杆菌并无更明显的效果。未观察到乳头皲裂或刺激现象，并且使用该测试产品作为挤奶前和挤奶后乳头消毒剂未发现任何不良影响。本研究结果表明，与仅进行挤奶后浸液处理相比，使用该测试产品先进行预浸然后再进行挤奶后浸液处理对主要乳腺炎病原体更有效。
