How is BVD managed in bovine herds?

How is BVD managed in bovine herds?

• A. Quarantine affected animals
• B. Cull PI animals, vaccinate calves/adults
• C. Do nothing
• D. Start broad-spectrum antibiotics

Answer: (B)

BVD control hinges on removing the animals that shed the virus continuously and boosting immunity in the herd. Persistently infected cattle are the main source of infection because they continuously shed high levels of virus for life, spreading it to pregnant cows and newborn calves. The most effective approach is to identify and cull these PI animals, which reduces the herd’s viral load and the chance of fetal infection or illness in others. Vaccinating calves and adults adds a layer of protection by priming the immune system to control infection and lessen clinical disease if exposure occurs. With fewer susceptible animals and less virus circulating, outbreaks become less likely and less severe. Quarantining affected animals can help contain spread temporarily, but it does not eliminate the persistent source of infection. Doing nothing leaves the virus circulating unchecked, and broad-spectrum antibiotics do not treat viral infections, though they may be used for secondary bacterial infections.

BVD control hinges on removing the animals that shed the virus continuously and boosting immunity in the herd. Persistently infected cattle are the main source of infection because they continuously shed high levels of virus for life, spreading it to pregnant cows and newborn calves. The most effective approach is to identify and cull these PI animals, which reduces the herd’s viral load and the chance of fetal infection or illness in others.

Vaccinating calves and adults adds a layer of protection by priming the immune system to control infection and lessen clinical disease if exposure occurs. With fewer susceptible animals and less virus circulating, outbreaks become less likely and less severe.

Quarantining affected animals can help contain spread temporarily, but it does not eliminate the persistent source of infection. Doing nothing leaves the virus circulating unchecked, and broad-spectrum antibiotics do not treat viral infections, though they may be used for secondary bacterial infections.