Trichomoniasis (Trich) in Cattle

BullTrichomoniasis ("Trich") is a venereal disease of cattle caused by the protozoan Tritrichomonas foetus, which is transmitted from cow to cow by infected bulls. This disease reduce calf production by decreasing fertility and inducing abortions.

While heifers usually rid themselves of Trichomoniasis in three to six months, bulls carry the infection for life without showing any symptoms. With no medically approved cures available, detection and control of infected bulls is key to containing the disease.

All breeding bulls entering Tennessee must now be accompanied with a certificate of veterinary inspection and be thoroughly tested for Trichomoniasis. Exceptions can be given for bulls entering the state for exhibitions or rodeos, provided that the bulls do not commingle with other cows.

An official sample must be done by an accredited veterinarian who has been approved by the state. Accredited veterinarians who want to be approved may call Dr. Sara Clariday at (615) 837-5120 or email her at

Related Links

Trichomoniasis Order of the State Veterinarian
List of Trichomoniasis Approved Veterinarians
Out-of-State Breeding Bull Destination Location Agreement
UT College of Veterinary Medicine
UT Veterinarians Discuss Trichomoniasis