Sharma Amit, Sharma Sanjita, Singh Navav, Sharma Vishnu, Pal Rahul Singh
Department of Livestock Production Management, Post Graduate Institute of Veterinary Education and Research (RAJUVAS), Jaipur, 302031, India.
Department of Animal Nutrition, Post Graduate Institute of Veterinary Education and Research (RAJUVAS), Jaipur, 302031, India.
Trop Anim Health Prod. 2016 Dec;48(8):1647-1652. doi: 10.1007/s11250-016-1138-y. Epub 2016 Aug 24.
Prevention of subclinical mastitis (SCM) is an important tool for sustainable dairying and implementing higher production level in animals. The present investigation involved a total of 397 quarters of milk examination of 105 indigenous Tharparkar cows at Livestock Research Centre, Chandan located in the Jaisalmer district of Rajasthan in Thar Desert to study the impact of udder and teat morphometry on udder health. Udder health was examined by somatic cell count to check the status of subclinical mastitis while udder and teat morphometry of 90 udder and 386 quarters, i.e., udder shape and depth, teat end shape, teat length, and teat diameter were examined at individual animal level and quarter level. Data were collected from the record register maintained at the farm and data evaluated by parity (no. of lactation) and stage of lactation. On analysis of variance, result revealed the significantly (P < 0.05) higher incidence of SCM was for pendulous shape udder in respect of regular udder, as well as for inverted and flat teat end shape in respect of pointed teat end shape. Large teat length and upper depth animals had significantly (P < 0.05) more incidence of SCM as compared to small and medium teat length and udder depth group, respectively. Thick teat diameter group animals were significantly (P < 0.01) more prone to infection as compared to medium and thin teat diameter group animals. So, it can be concluded that selection for optimum udder and teat morphometry in breeding program may help to reduce susceptibility for intramammary infections in Tharparkar cows. Microbiological study of milk samples could be helpful in the nearby future for identification of subclinical mastitis.
预防亚临床型乳腺炎（SCM）是实现奶牛养殖业可持续发展以及提高动物生产水平的一项重要手段。本研究对位于拉贾斯坦邦斋沙默尔区塔尔沙漠的钱丹畜牧研究中心的105头本地塔尔帕卡尔奶牛的397个乳区进行了牛奶检测，以研究乳房和乳头形态测量对乳房健康的影响。通过体细胞计数检查乳房健康状况，以检测亚临床型乳腺炎的情况，同时在个体动物水平和乳区水平上对90个乳房和386个乳区的乳房和乳头形态测量指标，即乳房形状和深度、乳头末端形状、乳头长度和乳头直径进行了检测。数据从农场保存的记录登记簿中收集，并按胎次（泌乳次数）和泌乳阶段进行评估。方差分析结果显示，与规则形状的乳房相比，下垂形状乳房的SCM发病率显著更高（P < 0.05）；与尖形乳头末端形状相比，内翻和平坦乳头末端形状的SCM发病率显著更高。与中小乳头长度和乳房深度组相比，大乳头长度和乳房上部深度的动物SCM发病率分别显著更高（P < 0.05）。与中细乳头直径组动物相比，粗乳头直径组动物感染的可能性显著更高（P < 0.01）。因此，可以得出结论，在育种计划中选择最佳的乳房和乳头形态测量指标可能有助于降低塔尔帕卡尔奶牛患乳房内感染的易感性。在不久的将来对牛奶样本进行微生物学研究可能有助于亚临床型乳腺炎的诊断。
