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‘Social distancing’ between sheep could eliminate maedi-visna in flock – study finds
Meadi-visna is an incurable and eventually fatal disease that occurs in most sheep-keeping areas globally.

Scientists find much higher rates of spread during winter housing periods

A new study from teams in Scotland and The Netherlands has found that prolonged close contact between sheep is effectively the sole cause of the spread of the incurable disease maedi-visna.

Occurring in most sheep-keeping areas across the globe, meadi-visna (MV) is mostly transmitted through exhaled droplets and aerosols from infected sheep, indicating that continued proximity aids in its spread. However, until now, there has been no quantitative analysis of virus transmission under farm conditions.

Scientists from the University of Edinburgh, Moredun Research Institute and GD Animal Health in The Netherlands found that the virus had a much higher rate of transmission during winter housing periods than between grazing sheep.

These findings suggest that MV could be eliminated from flocks over time, as the spread of the virus is too slow between sheep kept at grass to sustain the disease.

The study – published in the journal PLOS ONE - also found that the time between an animal being infected and becoming infectious is about one year, meaning that newly infected animals are highly unlikely to spread the disease. Additionally, lambs from infected ewes have a low chance of contracting MV.

Dr Tom McNeilly from Moredun Research Institute says: “This study answers simple but highly important questions for farmers on MV control: how is the virus transmitted between sheep and how best to prevent this happening?

“Our results show that transmission occurs almost exclusively during housing and points towards simple and practical methods to reduce transmission within the flock.”

Moving forward the teams will work to determine the most effective ways to test for the virus, as well as cheap and practical methods of reducing transmission.

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Vets to run marathon for World Animal Protection

News Story 1
 Two recently graduated veterinary surgeons will be running the London Marathon in April to raise money for the charity World Animal Protection.

Alex Bartlett and Maeve O'Neill plan to run the race together if they are given the same start times.

Dr O'Neill said: "You're always limited in what you can do to help animals, so it is nice to raise money for a charity that helps animals around the world."

Dr Bartlett added: "I have never run a marathon before and am excited to run my first one for such a good cause!"

Both Dr Bartlett and Dr O'Neill have fundraising pages online. 

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News Shorts
BSAVA releases new Guide to Procedures

The British Small Animal Veterinary Association (BSAVA) has published a new edition of its Guide to Procedures for Small Animal Practice.

It has added four new procedures; cystostomy tube placement, endotracheal intubation, point-of-care ultrasound and wet-to-dry dressings.

BSAVA says that it is an essential step-by-step guide to diagnostic and therapeutic procedures performed in practice. The textbook includes new images and illustrations, as well as high-definition videos for use prior to procedures.

Nick Bexfield and Julia Riggs, editors of the new edition, said: "We have built upon the success of the previous editions by responding to the feedback received from the BSAVA readership, and hope this new guide helps to further increase the confidence and accuracy with which these procedures are performed."

Print copies are available in the BSAVA store, with a digital version in the BSAVA library.