[Effect of squirting before or after milking and of teat dipping on udder infections (author's transl)].
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.
D000818:Animals; D002417:Cattle; D005260:Female; D007774:Lactation; D008414:Mastitis, Bovine / Q000517:prevention & control*; D008722:Methods; D011247:Pregnancy; D013203:Staphylococcal Infections / Q000517:prevention & control / Q000662:veterinary; D013290:Streptococcal Infections / Q000517:prevention & control / Q000662:veterinary
Influence sur les infections mammaires du giclage, avant ou après la traite, et du trempage