Bovine Trichomoniasis

Trichomoniasis is a venereal disease of cattle, characterised primarily by early pregnancy loss and, occasionally, by abortion and pyometra. Charlotte Johnston, TheCattleSite editor speaks with Dr Keith Roehr, Colorado State Vet, about the disease.

Bovine trichomoniasis (trich) is a reportable disease in many parts of the US. It appears to be mostly those states West of the Mississippi that have problems.

In recent years, thanks to an increased awareness, the number of cases have dropped significantly.


There is no outward evidence of the disease that makes it recognisable to producers, said Dr Roehr. It can only be confirmed by tests. Trich, does however, significantly reduce fertility, which can have a devastating economic impact for producers.

The disease is spread between cows, by bulls. Any bull found with the disease must be culled. Dr Roehr says that the majority of cows (97-99 per cent) will self clear of the disease within 120 days.

Whilst it is beneficial that cows can clear themselves of the disease, during this time period they will have missed a valuable time frame for coming into calf.

There are no accepted treatments out there for trich, said Dr Roehr, and there is a possibility that the disease may re-occur within cows.

With this in mind he advices producers to sell non-pregnant cows.


Bulls should be tested annually for trich. This, Dr Roehr said, is an excellent strategy to ensure that trich is not present in herds.

He also advised producers against buying non-pregnant cows, as they may be a source of the infection.

It is hard to put a dollar figure on trich, said Dr Roehr. However, if a producer only has a 50 per cent pregnancy rate for one season, that could put him out of business.

There is mandatory testing of all bulls when they are imported or change ownership. However frequent bull testing will control the disease, within the state, he said.

Concluding, Dr Roehr advised producers to work with their local veterinarians to subscribe a plan that works with each individual herd. It is also advisable to test bulls before breeding.


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