| investigations of breakdowns in protection provided by living babesia bovis vaccine. | field investigations of protection afforded by live babesia bovis vaccine in australia revealed that a ninefold increase in vaccine failures occurred in the period from 1985 to 1990. laboratory trials using 189 experimental cattle were conducted to evaluate the protection afforded by the babesia bovis strain used in the commercial vaccine during this time. four isolates from clinical cases of babesiosis in vaccinated cattle were assessed. the results showed that the strain used in the vaccine du ... | 1992 | 1496802 |