Roguinsky M
Ann Rech Vet. 1975;6(3):289-302.
Three trials are carried out within one experimental herd in order to study the effect of squirting before and after milking and of teat dipping on new infections in lactation. Experiment Mastitis III (M III) compares 10 cows as controls, 10 cows squirted after milking, 10 cows teat dipped and 10 cows squirted and teat dipped after milking. Experiment Mastitis IV (M IV) compares 17 cows as controls and 17 cows squirted before milking. Experiment Mastitis V (M V) uses 21 cows as controls and 19 cows squirted after milking. The evolution of infections is followed by sampling every two weeks. The number of new infections is decreased to 1 by squirting after milking for M III and to 8 for M V; the figures for control groups are 15 and 18. The total number of infections is also decreased between the beginning and the end of the trials, from 12 to 7 for M III and from 17 to 13 for M V, while it increases in the control groups from 10 to 15 and from 8 to 10. Squirting before milking has no effect on new infections (8 vs 9 for the control group in M IV). Teat dipping lowers the number of new infections (5 vs 15 for the control group of M III), but the association of squirting and teat dipping gives no better results (6 new infections). The pathogenesis of these results is discussed. It is more economical to use squirting, but there may be some practical difficulties. Automatization of squirting is suggested as related to automatic quarter-take-off devices.
在一个实验牛群中进行了三项试验，以研究挤奶前后喷水以及乳头药浴对泌乳期新感染情况的影响。乳腺炎实验III（M III）比较了10头作为对照的奶牛、10头挤奶后喷水的奶牛、10头进行乳头药浴的奶牛以及10头挤奶后喷水并进行乳头药浴的奶牛。乳腺炎实验IV（M IV）比较了17头作为对照的奶牛和17头挤奶前喷水的奶牛。乳腺炎实验V（M V）以21头奶牛作为对照，19头奶牛挤奶后喷水。每两周进行一次采样，以跟踪感染情况的演变。对于M III，挤奶后喷水使新感染数量降至1例，对于M V则降至8例；对照组的数字分别为15例和18例。试验开始和结束时，感染总数也有所下降，M III从12例降至7例，M V从17例降至13例，而对照组则从10例增至15例，从8例增至10例。挤奶前喷水对新感染没有影响（M IV中对照组为8例，喷水组为9例）。乳头药浴降低了新感染的数量（M III对照组为15例，药浴组为5例），但喷水和乳头药浴联合使用并没有更好的效果（6例新感染）。对这些结果的发病机制进行了讨论。使用喷水更经济，但可能存在一些实际困难。建议将喷水自动化与自动分路取奶装置相关联。
