Not all mosquitoes carry diseases – most are just a nuisance. However, they can carry a range of diseases and during the warmer months, mosquito numbers are high along many parts of the Murray River and its surrounds. 

For information on how to prevent mosquito-borne diseases after a flood or heavy rainfall, click here

General advice

People should take action to prevent being bitten, particularly those who spend time near the region’s waterways.

We encourage people to:

  • Use an effective mosquito repellent, containing either picaridin or DEET, on all exposed skin.
  • Wear loose fitting clothes that cover your skin.
  • Try to limit outdoor activity if lots of mosquitoes are about (usually dusk and dawn).
  • Take action to prevent mosquito breeding around your home.

For more information, go to the Better Health Victoria's website by clicking here

For resources, click below:

Run a tourism business?
We have created a special fact sheet for those who have a hospitality business or provide guest accommodation. Click here to download.

For information on Japanese encephalitis virus (JE virus) click here

Ross River virus

Ross River virus has been repeatedly detected in mosquitoes in these inland areas. Particularly in the summer months, there is increased risk that people living in or travelling to these areas may be infected by mosquitoes carrying Ross River virus.

Ross River virus is endemic throughout Victoria. All mosquitoes may carry a risk for Ross River virus infection, although the risk is greatest in rural and regional Victoria, including many coastal and riverine holiday areas. Infections occasionally also occur in outer metropolitan areas. Ross River virus can cause joint swelling and pain, fatigue and muscle aches which can persist for many months. A rash and fever may also develop. It takes three to nine days for symptoms of Ross River virus disease to occur after exposure, and occasionally up to 21 days.

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Murray Valley encephalitis

MVE virus was first isolated from patients who died from encephalitis in the Murray Valley in Victoria and South Australia in 1951. It was previously included as one of the causative agents in the disease called ‘Australian encephalitis’, which also included disease caused by Kunjin virus, another flavivirus. These viruses are now accepted as causing two separate diseases: MVE and West Nile/Kunjin. Since 2010, Kunjin has been known as West Nile/Kunjin virus.

MVE virus commonly infects humans without producing apparent disease (subclinical infection). Only one person in about 800 of those infected with MVE virus develops clinical disease. It may also cause a comparatively mild disease with features such as fever, headache, nausea and vomiting. In a small percentage of all people infected, mild disease may be a prodrome to disease progression and the involvement of the central nervous system. This can result in meningitis or encephalitis of variable severity. Signs of brain dysfunction, such as drowsiness, confusion, fitting, weakness or ataxia, indicate the onset of encephalitis.

For more information, click here