Protection of cattle against natural challenge withLeptospira interrogansserovarhardjousing a hardjo-pomona vaccine
- 1 June 1979
- journal article
- research article
- Published by Taylor & Francis in New Zealand Veterinary Journal
- Vol. 27 (6) , 114-116
- https://doi.org/10.1080/00480169.1979.34620
Abstract
The hardjo component of a bivalent hardjo/pomona vaccine prepared from cultures grown in a protein-free medium was tested in calves which experienced a natural challenge about 7 months after vaccination. A significant degree of protection was obtained using either seroconversion or positive urine cultures as in-dicators of infection. Seroconversion occurred in 10/10 non-vaccinates and 2/9 vaccinates (p hardjo were isolated from the urine of 6/10 non-vaccinated calves and 0/9 vaccinated animals (p <0.05).Keywords
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