Cookie use on MRCVSonline
We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive all cookies.
If you would like to forward this story on to a friend, simply fill in the form below and click send.

Your friend's email:
Your email:
Your name:
 
 
Send Cancel

New model for vector-borne disease
The model enables a better understanding of the impact of biting midges.

Model can distinguish between midge and animal movement

A new model that can determine vectors for bluetongue and Schmallenberg virus has been developed by scientists at The Pirbright Insitute. Researchers hope the model could be applied to other diseases to help better inform control strategies.

Writing in PLOS Computational Biology, researchers use the model to establish that 90 per cent of bluetongue transmission between farms is a result of midge dispersal, while for Schmallenberg it is 98 per cent.

“Previous models used to study the 2007 bluetongue outbreak in the UK were able to show how the disease spread, but were not sophisticated enough to determine the primary route of transmission which is crucial in helping to bring an outbreak under control quickly,” explained Dr Simon Gubbins, group leader for transmission biology at the Institute.

“Our new model is able to distinguish between disease that is spread through midge movement and through animal movement. For both viruses, we have shown that insect movements account for the majority of spread between farms. Animal movements play an important role in introducing disease to new areas, but they cannot sustain an epidemic on their own.

“Importantly, the approach we have established for BTV and SBV could also be applied to other diseases spread by biting midges”.

Bluetongue virus and Schmallenberg virus infect cattle and sheep, causing huge economic losses to farmers across the world. Both diseases are vector-borne, meaning they need another organism to aid transmission between animals. Until now, however, it was not clear whether biting midges or the movement of animals made the most significant contribution to transmission.

Researchers say that by enabling a better understanding of the impact of biting midges and animal movement in transmission, the new model will help ensure outbreak control strategies and procedures are better informed.

It may also change the way livestock movements are controlled and will enable more accurate predictions about the spread of an outbreak and where it would be best to vaccinate.

Become a member or log in to add this story to your CPD history

Endangered turtle born at London Zoo

News Story 1
 An endangered spiny hill turtle has become the first of its kind to hatch at ZSL London Zoo - just in time for World Turtle Day (23 May).

Zookeepers filmed the moment the turtle came out of its shell on a time lapse camera, after keeping a watchful eye on the egg during its 136 day incubation period.

The turtle weighed a tiny 33g at birth and measured just 61mm, although it will eventually grow to around 27cm in size. 

News Shorts
Melissa Donald elected president of BVA Scottish Branch

RCVS Council member Melissa Donald has been elected for a two-year term as president of BVA’s Scottish Branch. She said she was “honoured” to be elected and hopes to provide a strong voice for veterinary surgeons, particularly at a national level. One of her first tasks will be to give evidence to the Scottish government on tail shortening of dogs, before parliament votes on whether to change the current legislation.

Melissa graduated from Glasgow veterinary school and worked as a production animal vet at Iowa State University, USA, for three years, before returning to Ayrshire to work in mixed practice. She then spent 25 years developing a small animal practice with her husband and has been involved with the BVA for many years. Recently, she took the decision to step back from clinical practice and currently runs a smallholding in the Ayrshire Hills.