Mosquito-borne virus detected in Central Queensland

Horse owners are urged to be aware of the potential for mosquito-borne viruses to cause illness in horses following the detection of Kunjin virus in mosquitoes in the Central Highlands area.

The identification was made as part of a routine surveillance program run by Queensland Health.

Kunjin virus is endemic in parts of Australia and can cause disease in humans and horses. It is spread by the bite of an infected mosquito.

Clinical signs in horses include:

• reluctance to move
• depression
• neurological signs (stumbling, incoordination, facial paralysis, muscle tremors, circling, blindness).

Horses can become infected with Kunjin virus and show no signs of illness. Most clinical cases recover gradually over 1- 3 weeks, however approximately 10 per cent of affected horses will die or be euthanased for welfare reasons.

The horse is seen as a ‘dead-end’ host for Kunjin virus and is not considered a likely source of new infection for people or other horses.

People should take steps to avoid being bitten by mosquitoes. Horse owners can reduce the exposure of their animals to insect bites by:

• using registered repellents
• rugging
• using fly masks
• removing sources of stagnant water.

It is important to consider Hendra virus infection in horses showing neurological signs and implement stringent biosecurity and hygiene measures when dealing with sick horses.

Horse owners are reminded to contact their private veterinarian if their horse is unwell.

Read more information on mosquito-borne viruses in horses or on Kunjin virus in people.