What is the prevalence of trichomonosis infection in California cattle?
15.8% (9/57 herds) of California cow-calf herds were affected with trichomonosis in a 1990 study (BonDurant RH, et al; Prevalence of trichomoniasis among California beef herds; J Am Vet Med Assoc 1990; 196(10): 1590-1593). This study tested 729 bulls from 57 herds. Herd size, as judged by number of bulls, ranged from 1 to 210 bulls (median = 6 bulls per herd). CDFA expects to garner a better understanding of current trichomonosis prevalence in California in the coming years thanks to updated regulations requiring all positive and negative trichomonosis tests be reported.
