Kimberley residents and travellers are being urged to take precautions against mosquito-borne viruses, following the detection of Ross River virus (RRV) and Barmah Forest virus (BFV) in mosquito populations across the region. The Western Australian Department of Health’s surveillance program identified the viruses, prompting a call for increased vigilance as the peak mosquito season approaches.
While not typically considered deadly, both RRV and BFV can cause debilitating symptoms, including joint pain, muscle soreness, skin rashes, fever, and fatigue, lasting for weeks or even months. Health officials emphasize the importance of heeding community alerts issued when increased virus activity is detected. The Department of Health’s program serves as an early warning system for mosquito-borne virus activity in northern Western Australia.
Mosquitoes in northern WA can also transmit the more serious, though currently undetected this season, Murray Valley encephalitis (MVE) and Japanese encephalitis (JEV) viruses. Currently, no human infection cases of either MVE or JEV have been reported this season, but authorities are maintaining a watchful eye. A vaccine against JEV is available for Kimberley residents, while vaccines for RRV, BFV, and MVE remain unavailable.
The peak period for mosquito activity in northern Western Australia runs from December to June, increasing the risk of exposure to these viruses. To combat this, the state launched the “Repel, Prevent, Protect” program in 2025, providing free mosquito repellent in key locations throughout the Kimberley region, where the risk of bites is highest. But, officials caution that relying solely on these programs is unrealistic, and personal protection remains crucial.
Understanding the Risks: RRV, BFV, MVE, and JEV
Ross River virus and Barmah Forest virus are the most common mosquito-borne viruses in Western Australia, according to HealthyWA. While symptoms are often unpleasant and prolonged, severe complications are rare. MVE and JEV, however, pose a greater risk, with MVE potentially causing severe neurological illness. The Department of Health advises extra caution for those living in or travelling to northern WA due to the potential presence of these viruses.
Protecting Yourself: Fight the Bite!
The most effective way to prevent infection is to avoid mosquito bites. Dr. Andrew Jardine emphasized, “The simplest way to prevent infection with any mosquito-borne virus is to avoid being bitten – remember to Fight the Bite!” Here’s how to protect yourself:
- Cover Up: Wear long, loose-fitting, light-coloured clothing. Ensure insect screens are installed and in great condition on houses, tents, and caravans. Use mosquito nets and mosquito-proof tents when sleeping outdoors, and pram netting for babies and infants.
- Repel: Apply an effective personal mosquito repellent containing diethyltoluamide (DEET), picaridin, or Oil of Lemon Eucalyptus (PMD) evenly to all exposed skin, always following label instructions. It’s important to note that Oil of Lemon Eucalyptus is different from eucalyptus oil and provides more effective protection.
- Clean Up: Keep grass and vegetation short around your home to reduce mosquito habitats. Empty or remove any containers that hold water, as these are breeding grounds for mosquitoes.
Ongoing Surveillance and Community Collaboration
The Department of Health continues to collaborate with local governments to minimize the impact of mosquitoes through mosquito management strategies and the distribution of repellent stations. However, these measures are not foolproof, and individual responsibility remains paramount. The surveillance program will continue to monitor mosquito populations and virus activity throughout the region.
For more detailed information on symptoms, prevention tips, and the latest updates, visit HealthyWA. Staying informed and taking proactive steps are key to protecting yourself and your community from mosquito-borne viruses.
As the mosquito season progresses, continued monitoring and public awareness will be crucial in mitigating the risk of infection. The Department of Health will continue to provide updates and guidance as needed. Please share this information with friends, family, and fellow travellers to ensure everyone stays safe.
Disclaimer: This article provides informational content about health topics and is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider for any questions you may have regarding a medical condition.
