
16/08/2025
BVD - diarrhoea virus disease
(Bovine Viral Diarrhoea)
What is BVD ?
It is a highly infectious viral disease that affects cows, affecting several devices in the body, starting from the digestive system to the reproductive and immune system.
It comes in two major forms:
1. The sharp shape ( acute )
2. Chronic form - where the animal remains pregnant with the virus for life (PI animals)
Why is it so dangerous ?
Because of the diseases that:
• Abortion causes in pregnant cows
• The immune system weakens, which makes the animal susceptible to any other infection
• Leads to the outburst of newborn calves
• And the most dangerous ? Animals carrying the virus have chronically been an ongoing source of infection transmission without apparent symptoms
Clinical Symptoms :
• Bloody diarrhoea or mucus
• ulcers in the mouth
• temperature rise and weight loss
• Abortion and fertility issues
• And in some cases: respiratory problems, eye infections, and sudden death in calves
- Methods of Diagnosis:
• PCR CHECK UP OR ELISA
• Isolate the virus from blood or tissue
• Antibody Analysis
Prevention:
• Periodic and regular fortification
• Isolation of new or suspected animals
• Immediate disposal of chronic pregnancy animals (PI animals)
• Applying a health management system for the herd
Economic losses:
• Reproductive losses (abortion, delayed fertility)
• Weakness in growth and increased expenditure rate
• Decrease in milk production
• The cost of treatment, isolation, and productivity losses
- Not just a disease... But a continuous losses project if he enters!
- The lens of a veterinary student