After more than 50 years of research, scientists have built a better understanding of the unusual biology of the disease pathogen and vectors for epizootic bovine abortion (EBA). The pathogen, transmitted by the Pajaroello tick, typically does not cause disease in cows or heifers, but does affect the developing fetus in pregnant females, resulting in abortions or stillbirths.
Source: Bovine Veterinarian, July 27, 2016.
Better understanding of the disease pathogen has led to development of an experimental vaccine to protect against EBA. According to a news release from UC Davis, vaccine trials to prevent the disease are now in the second year, thanks to a longtime partnership between UC Davis, the University of Nevada, Reno, and the California Cattlemen’s Association.
INSIGHTS: The pajaroella tick (Ornithodoros coriaceus) has a fairly wide distribution in the coastal and mountainous areas of California and Mexico. Given the delayed effect of the pathogen on developing fetuses, bred heifers coming from coastal regions to the Midwest or West may need extra considerations.