Murray Valley encephalitis: summer is over but mosquito-borne disease remains a risk in northern Australia

Cooler temperatures are fading our memories of summer and reducing numbers of mosquitoes in southern parts of Australia. But up north, warmer temperatures and plenty of rain will keep mosquitoes active.

While their bites are annoying, more concerning is the diseases mosquitoes carry. Health authorities have recently warned local communities and travellers heading to the Kimberley and Pilbara regions of Western Australia to be vigilant to the risk of one particular mosquito-borne infection – Murray Valley encephalitis.

Australia is fortunate to be generally free of many of the world’s most dangerous mosquito-borne diseases.

Each year globally, malaria can cause hundreds of thousands of deaths and dengue infects hundreds of millions of people. While these two diseases aren’t a high risk in Australia, we do have a number of viruses spread by mosquitoes that can cause severe and potentially fatal illness.

Thousands of Australians are infected with Ross River or Barmah Forest virus each year, and while these diseases aren’t fatal, they can be debilitating. Symptoms can include fever, rash, joint pain and fatigue.

Authorities in Queensland and New South Wales have recently issued warnings about these diseases.

Read more: How can the bite of a backyard mozzie in Australia make you sick?

In recent years, we’ve seen increased activity of the Murray Valley encephalitis virus and the closely related Kunjin virus. This is due to........

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