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Abstract
One hundred and one cows and heifers were artificially inseminated with semen from a trichomonad infected bull and semen from a normal bull to which Trichomonas foetus had been added. The semen was diluted with raw or hyper-immune bovine sera for the purpose of inactivating or destroying-the trichomonads. Twenty cows became pregnant and calved normally (19.8%). Artificial insemination of twenty control animals with normal undiluted semen resulted in 17 pregnancies. Twenty control cows bred artificially with semen from an infected bull resulted in 4 normal calvings; 16 cows contracted trichomoniasis. This method cannot be placed on a practical basis until the spermaticidal effects of bovine sera can be removed.
1 Published with the approval of the Director of the Wisconsin Agricultural Experiment Station. Project No. 621-V, Trichomoniasis and other reproductive diseases of cattle.
2 Department of Veterinary Science, Madison, Wisconsin.
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