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THE EFFECT OF LEPTOSPIRA HARDJO VACCINE IN A NORTHERN QUEENSLAND BEEF HERD
Author(s) -
Holroyd R. G.,
Smith P. C.
Publication year - 1976
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.1751-0813.1976.tb00101.x
Subject(s) - herd , library science , citation , geography , zoology , biology , computer science
In a northern Queensland beef herd where there was serological evidence of L. hardjo infection, lactation failure or wastage between pregnancy diagnosis and branding was 11.9% in animals vaccinated with a single dose of a L. hardjo vaccine and 19.4% in unvaccinated controls. This difference was statistically significant (P less than 0.05). Vaccination caused a significant (P less than 0.05) reduction in rate of lactation failure in heifers but not in other classes of cows.