The ROSS River virus was found in Gippsland Lakes and 90 Mile Beach mosquitos.
The state health department urges people to protect themselves from mosquito-borne diseases such as the Ross River and Barmah Forest viruses.
These viruses can cause symptoms such as joint pain and stiffness, headache, fever, rash, and fatigue.
Recent weather conditions are favorable for mosquitoes and mosquito breeding.
Most bites cause minor swelling and irritation, but infected mosquitoes can transmit potentially serious diseases.
Any part of Victoria that is mosquito-found can be at risk for Ross River virus infection, although rural and regional Victoria is most at risk.
The Ross River and Barmah Forest viral diseases are similar. Both of these can cause joint swelling and pain, fatigue, and muscle aches that can last for many months, while a rash and fever can also develop.
It takes three to nine days for symptoms of Ross River Virus disease to appear after exposure, and occasionally up to 21 days.
Symptoms of Barmah Forest Virus disease appear seven to ten days after being bitten by an infected mosquito.
While people recover from the first onset, some people may have symptoms return for more than a year or more.
The best protection against these diseases is to avoid mosquito bites.
Protective measures include regularly using mosquito repellants containing picaridin or DEET on all exposed skin, wearing long, loose-fitting clothing outdoors, and ensuring that accommodations, including tents, are properly equipped with mosquito nets or screens .