Summer's Buzzing Threat: NSW on High Alert for Mosquito-Borne Viruses!
The warm season has arrived, but with it comes a worrying warning from NSW Health. They've detected two mosquito-borne viruses earlier than expected, and these tiny insects could be packing a dangerous punch. But here's the catch: these viruses can lead to brain swelling!
The first sign of trouble was the Japanese Encephalitis virus, found in mosquitoes in the Horsham Rural City Council region, Victoria, marking the start of the 2025-2026 season. And it doesn't stop there. Another surprise guest, the Kunjin virus, has made an appearance in Western NSW at Cowra, detected in a sentinel chicken's blood sample on November 20, 2025, as part of routine surveillance.
Dr. Stephen Conaty, NSW Health's Director of Health Protection, is concerned about these early detections. With warmer weather, mosquito populations could skyrocket, and the risk of bites increases. These bites can lead to various diseases, including Japanese Encephalitis, Murray Valley Encephalitis, and infections from Kunjin, Ross River, and Barmah Forest viruses.
60 LGAs in NSW are now considered high-risk zones for the Japanese Encephalitis virus. Residents and travelers in these areas should take extra precautions to avoid bites. Thankfully, there's a free, effective vaccine available for those living or working in these LGAs and some high-risk occupations.
The JE vaccine is easily accessible through general practitioners, Aboriginal health services, and pharmacists. Those eligible should book appointments and inform providers in advance. But here's where it gets controversial: some providers may charge a consultation fee, and the vaccine might not be readily available, requiring a few days' notice.
For those at ongoing risk, a booster shot may be recommended one to two years after the initial vaccination.
Unfortunately, there's no specific treatment or vaccine for Kunjin virus or other mosquito-borne diseases in Australia. The best defense is to avoid bites. Mosquitoes are most active at dusk and dawn, so it's crucial to take preventive measures.
To keep those pesky mosquitoes at bay:
- Use repellents with DEET, picaridin, or oil of lemon eucalyptus on exposed skin, following reapplication instructions.
- Reapply after swimming, ensuring sunscreen is applied first.
- Dress in light, long-sleeved shirts, long pants, socks, and covered shoes.
- Stay indoors during peak mosquito hours, especially at dawn and dusk.
- Utilize insecticide sprays, vaporizers, and mosquito coils (outdoors only, in well-ventilated areas).
- Install insect screens on windows and doors, ensuring no gaps.
- Remove water-collecting items like old tires and empty pots to reduce breeding grounds.
- For children, use safe repellents suitable for those aged three months and older, following label instructions.
- Protect infants under three months with mosquito netting over carriers, securely fastened.
- When camping, use a tent with fly screens or sleep under a mosquito net.
For more on JE virus and protection, visit the provided links. Remember, these diseases can't be transmitted directly between humans or other animals, so it's all about bite prevention!
What are your thoughts on mosquito-borne diseases and the availability of vaccines? Do you think more should be done to raise awareness and provide access to treatments? Share your opinions below!
