Читать книгу Bovine Reproduction - Группа авторов - Страница 184

Trichomoniasis caused by the protozoan Tritrichomonas foetus subsp. venerealis is a venereal disease resulting in endometritis, embryonic death, abortion, and pyometra in infected cattle. The bull serves as an asymptomatic carrier [27]. Prevention of bovine trichomoniasis is centered on biosecurity practices to avoid introduction of infected individuals into the herd. Only one T. foetus vaccine is currently available in the USA. Administration of this killed vaccine to bulls aged 55–72 months prevented colonization of the preputial epithelium following intrapreputial challenge [28]. Within affected herds, vaccination of bulls and cows may reduce the economic impact of this pathogen [14].