Australia: Ross River virus cases more than triple in Queensland in 2024
Health authorities in Queensland, Australia reported an increase in mosquito-borne infections in 2024, but one infection was most notable—Ross River virus.
In 2024, Queensland Health reported 2477 total cases, more than three times the number of cases reported in 2023 (699).
The 2024 total is the most reported in Queensland since 2020, when 3381 cases were reported.
The Commonwealth Scientific and Industrial Research Organisation (CSIRO) said hot and wet weather around the state off the back of La Niña conditions over the last few years had created a haven for mosquito breeding.
"This means an increased number of mosquitoes and unfortunately more opportunity for mosquitoes to transmit viruses," principal research scientist Prasad Paradkar said.
The symptoms of Ross River fever include fever, chills, headache, aches and pains which typically begin within three weeks of being bitten.
Tiredness and sore and swollen joints can also occur. A rash may appear for the first 7 – 10 days of illness in some people.
Symptoms can subside after a few weeks but some people may experience them for weeks or even months. People should see their doctor if they experience these symptoms.
People can reduce their risk of getting Ross River fever by avoiding being bitten by mosquitoes. Steps to avoid being bitten by mosquitoes include:
When outside cover up as much as possible with light-coloured, loose-fitting clothing and covered footwear
Use an effective repellent on all exposed skin. Re-apply repellent within a few hours, as protection wears off with perspiration. The best mosquito repellents contain Diethyl Toluamide (DEET) or Picaridin
Take special care during peak mosquito biting hours, especially around dawn and dusk
Remove potential mosquito breeding sites from around the home and screen windows and doors
Light mosquito coils or use vaporising mats indoors. Devices that use light to attract and electrocute insects are not effective
When camping, use flyscreens on caravans and tents or sleep under mosquito nets.