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The South Dakota Animal Industry Board (AIB) is working with the herd owner and their veterinarian to develop a management plan to contain the disease.

Bovine Trichomoniasis reported in Bennett County herd

PIERRE, SD – Bovine trichomoniasis (trich) has been detected in a South Dakota cattle herd. A bull from a beef cattle herd in Bennett County has tested positive for the disease.

The South Dakota Animal Industry Board (AIB) is working with the herd owner and their veterinarian to develop a management plan to contain the disease.

Neighboring herd owners with potential contact animals will be informed of the risk to their animals as the investigation continues.

Trichomonas foetus is a protozoal parasite that is transmitted between cows and bulls during breeding and can cause early term abortions. Producers are often unaware of the problem until the disease is well established in the herd. Signs that the disease may be present in a herd include a higher number of open
(non-pregnant) and late-calving cows than expected.

Producers can take precautions to help prevent their herd from becoming infected. First, only purchase and use virgin bulls for breeding. If non-virgin bulls are used, they should be tested for trich prior to breeding.

Bulls may also be tested two weeks after breeding for early detection of potential problems. Timely pregnancy testing of females following the breeding season and prompt removal of open cows to be sold for feeding and slaughter will also decrease the risk of disease spread. Finally, maintain good border fencing to keep livestock in their respective pastures and avoiding unintentional commingling of herds.

Since 2005, in cooperation with the cattle industry, the AIB continues to implement the following rules to help prevent trich in cattle:
• Non-virgin bulls must be tested negative for trich prior to being sold, loaned or leased in South
Dakota for breeding purposes;
• Any non-virgin bull entering South Dakota must be tested negative for trich;
• Non-virgin, non-pregnant female cattle (open cows) may not be imported, loaned, leased nor
acquired for breeding purposes in South Dakota.

Cattle producers with concerns about trichomoniasis should contact their herd veterinarian or the AIB at 605-773-3321.

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