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Vaccine offers hope in fight against major chicken disease
The recombinant vaccines have potential to be more cost-effective and respond to emerging new virus strains.
Researchers test effectiveness of recombinant virus vaccine

Researchers have developed a new vaccine strategy that could help chickens in the fight against infectious bronchitis.

Current vaccines that protect against infectious bronchitis guard against some strains of the virus, but not others. Scientists believe these failures are associated with differences in the spike protein - the protein which enables the virus to attach to and enter cells - between strains of the virus.

Writing in the Journal Of Virology, researchers describe how they tested a new approach using a specialist type of vaccine, known as recombinant virus vaccine. These vaccines use harmless or weak versions of a virus or bacteria to introduce microbes into cells into the body.

The team used recombinant viruses with different spike proteins as vaccines to build two versions of a harmless virus. They found that the vaccine offered partial protection against infectious bronchitis virus, but further research is needed to develop a more robust vaccine.

Researchers say the recombinant vaccines have potential to be more cost-effective and respond to emerging new virus strains. The next step will be to develop a vaccine that remains harmless but induces a stronger immune response.

Professor Lonneke Vervelde, who led the study at the University’s Roslin Institute, said: “There is a real need to develop new vaccines against infectious bronchitis that protect against multiple strains and offer rapid responses. We are trying to make a vaccine that offers broad protection, but further research is needed to develop a more robust vaccine.”

Dr Erica Bickerton at the Pirbright Institute, who also took part in the study, said: “Our research hopes to develop more cost-effective and efficient commercial vaccines that are capable of protecting chickens against this serious disease.”

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Free CPD announced for BVNA members

News Story 1
 Zoetis is to present a CPD event for free to members of the British Veterinary Nursing Association (BVNA).

Led by veterinary consultant Ruth Moxon, the one-hour online session is designed to help veterinary nurses discuss parasiticide options with clients. It will advise on structuring recommendations, factors for product choice and moving away from 'selling'.

'How do you recommend parasite treatments to your clients?' will be presented on Tuesday, 20 May at 7.30pm. It is free for BVNA members, with £15.00 tickets for non-members.

Veterinary nurses can email cpd@bvna.co.uk to book their place. 

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DAERA to reduce BVD 'grace period'

DAERA has reminded herd keepers of an upcoming reduction to the 'grace period' to avoid BVD herd restrictions.

From 1 May 2025, herd keepers will have seven days to cull any BVD positive or inconclusive animals to avoid restrictions being applied to their herd.

It follows legislation introduced on 1 February, as DAERA introduces herd movement restrictions through a phased approach. Herd keepers originally had 28 days to cull BVD positive or inconclusive animals.

DAERA says that, providing herd keepers use the seven-day grace period, no herds should be restricted within the first year of these measures.

Additional measures, which will target herds with animals over 30 days old that haven't been tested for BVD, will be introduced from 1 June 2025.

More information is available on the DAERA website.