BVD Biosecurity before breeding - Animal Health Ireland

By: Dr Maria Guelbenzu

BVD & IBR Programme Manager

23 April 2026

BVD remains a risk for all herds, particularly in areas where recent positive cases have been identified. Even herds with no previous history can become infected, so it’s important to stay vigilant, especially in the run-up to breeding.

All herds are encouraged to review their biosecurity practices with their vet before breeding. This is particularly important for BVD, to reduce the risk of pregnant cattle being exposed to the virus.

Key Steps to Protect Your Herd

Know your local risk
If there has been a BVD positive case nearby, your herd is at higher risk, even if you’ve never had an issue before. Check the AHI maps regularly to see what’s happening in your area and review your biosecurity if cases are close by.
Avoid boundary contact
Nose-to-nose contact between cattle is a common way BVD spreads. Where possible, keep breeding animals, especially those up to 120 days in-calf, away from boundaries where they can mix with neighbouring stock.
Isolate all incoming animals
Any purchased animals, or those returning from marts, shows or contract rearing, should be quarantined for at least 28 days.
If they are in-calf, test their calves as soon as possible after birth and keep them separate from other pregnant animals until a negative result is confirmed.
Mind hygiene for people and equipment
Visitors, contractors and staff can all carry infection onto the farm. Use farm-specific boots and clothing where possible, or ensure proper cleaning and disinfection.

Avoid sharing equipment, but if you must, make sure it is thoroughly cleaned and disinfected before use.
Use vaccination as added protection
Vaccination won’t stop BVD getting onto your farm, but it can reduce the impact if it does. It’s an extra layer of protection, not a substitute for good biosecurity.