Victoria’s early warning mosquito surveillance program has identified the virus in two mosquito traps in Moira Shire – the first mosquito-borne disease detections this season.
It follows similar recent detections in New South Wales and a confirmed human case of Japanese encephalitis identified in northern Victoria in December. Victoria’s Chief Health Officer, Tarun Weeramanthri, said the findings confirmed the virus was circulating in northern Victoria.
“Japanese encephalitis virus can cause a rare but potentially serious infection of the brain and is spread to humans through bites from infected mosquitoes,” Dr Weeramanthri said.
“If you’re visiting northern Victoria, particularly inland riverine regions and near the Murray River, you’re potentially at higher risk of infection.
“It’s important to take steps to prevent mosquito bites so cover up, use repellent and limit your time outdoors when mosquitoes are about.”
A statement provided from the Goulburn Valley Public Health Unit stated that authorities will be monitoring mosquito-borne disease risks closely and urge the community to remain alert and to protect themselves against mosquito bites.
“It’s important to note that the detection of Japanese Encephalitis (JE) virus in mosquito traps does not mean the public health risk is limited to those specific locations—risk is assessed at a broader local government area (LGA) level,” the statement said.
“With multiple data points—including human and mosquito detections—confirming that JE virus is circulating in northern Victoria, we remind residents and visitors, particularly in the high-risk areas including inland river land areas near the Murray, to take precautions.
“Mosquitoes can spread JE, Murray Valley Encephalitis (MVE), and Ross River virus, and with mosquito activity increasing at this time of year, prevention is key.
“We encourage people to wear long, loose-fitting clothing, use insect repellent, and remove stagnant water around homes. Vaccination for JE is also available and is free for those at higher risk. People can check if they are eligible by heading to: www.health.vic.gov.au/japenese-encephalits.
If camping or caravaning in high-risk areas along the border:
• ensure mosquito screens are intact • close doors and tent flaps to stop mosquitoes getting inside • use a mosquito net if mosquito screens are not available • try to avoid camping near wetland habitats where mosquitoes are likely breeding.
There is no specific treatment available for Japanese encephalitis.
The best prevention is to protect against mosquito bites. For people who develop Japanese encephalitis, treatment aims to reduce the severity of the symptoms and may include medication and admission to hospital.
In both Victoria and NSW the JE vaccine is available free-of-charge for residents in high-risk local government areas including Federation Council, Moira Shire and Indigo Shire for people 2 months or older.
The risk of exposure to mosquitoes is low at an elevation of greater than 500 metres. Therefore, JE vaccination is only recommended for individuals who spend significant time outdoors below this elevation in these local government areas.
To obtain a free vaccine contact your local medical clinic or health service provider.
Fatal bites
In May 2022, Corowa man David Kiefel suffered greatly after a bite in February. Mr Kiefel became the second person to die with Japanese encephalitis, as advised by NSW Health at the time and as reported in detail in the Yarrawonga Chronicle.
Mr Kiefel contracted the virus following a wet, humid summer and huge mosquito numbers.
