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INCIDENCE OF TRITRICHOMONAS FOETUS IN YOUNG REPLACEMENT BULLS FOLLOWING INTRODUCTION INTO AN INFECTED HERD
Author(s) -
Christensen H. R.,
Clark B. L.,
Parsonson I. M.
Publication year - 1977
Publication title -
australian veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.382
H-Index - 59
eISSN - 1751-0813
pISSN - 0005-0423
DOI - 10.1111/j.1751-0813.1977.tb00137.x
Subject(s) - animal health , incidence (geometry) , herd , veterinary medicine , medicine , mathematics , geometry
Three hundred 8-year-old Shorthorn and Santa Gertrudis bulls, with a 47% incidence of Tritrichomonas foetus infection in the 30 surveyed, were removed from a herd of approximately 6000 cows and replaced by 325 two-year-old Brahman bulls. A sample of 50 of the replacement bulls was examined at introduction and found to be uninfected. After 2 years, the incidence of infection in a sample of 80 of the replacement bulls was 4%. The results suggests that a major reduction in incidence of infection in extensively managed herds might be achieved by the exclusive use of young bulls for mating.