The effect of Leptospira hardjo vaccine in a northern Queensland beef herd.
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.
D000818:Animals; D001315:Australia; D002417:Cattle; D002418:Cattle Diseases / Q000517:prevention & control*; D005260:Female; D007774:Lactation; D007775:Lactation Disorders / Q000662:veterinary; D007922:Leptospirosis / Q000517:prevention & control / Q000662:veterinary*; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000517:prevention & control / Q000662:veterinary*; D014611:Vaccination / Q000662:veterinary*