Queenslanders are being cautioned about a potential rise in cases of the Ross River Virus due to a surge in mosquito numbers following recent wet weather.
John Gerrard, the Chief Health Officer, advises residents from Mackay down to the state's southeast to stay vigilant and avoid mosquito bites.
Recent testing of mosquitoes caught in traps has revealed a high number carrying the virus. In humans, this virus can lead to symptoms like fever, swollen joints, and a rash. While most people recover within a few weeks, some may experience prolonged pain and fatigue. Unfortunately, there's no vaccine for this virus transmitted by mosquitoes.
Dr. Gerrard, speaking from the Gold Coast, warns that there's a risk of more Queenslanders becoming infected compared to the previous surge in cases during 2019-20 when over 3,000 people were affected.
"Surveillance has shown a significant increase in mosquitoes infected with the Ross River Virus across multiple regions of Queensland," Dr. Gerrard said. "This suggests that a considerable number of Queenslanders may contract the virus in the coming weeks, possibly reaching into the thousands."
Out of 700 insects tested across the state recently, 31 were positive for the virus, according to Dr. Gerrard.
Areas anticipated to experience a surge in cases include Brisbane, Bundaberg, the Banana Shire, Gold Coast, Fraser Coast, Livingston Shire, Mackay, Moreton Bay, Sunshine Coast, and Wide Bay. Dr. Gerrard warns that more areas could soon be affected.
The increased rainfall across the state has contributed to a rise in mosquito numbers. "The number of positive traps we've detected in the last three weeks surpasses the total seen during the 2019-20 summer, which was a major epidemic of the Ross River Virus across Queensland," Dr. Gerrard noted.
While the virus has been detected in mosquitoes so far, Dr. Gerrard predicts human cases will emerge in the next few weeks, given the virus's two-week incubation period.
In response to the situation, the City of Gold Coast is intensifying mosquito control efforts, including larval spraying and insect elimination. This may cost the council around $1 million. Mayor Tom Tate suggests exploring drone technology for mosquito control in the future.
To prevent mosquito bites, Queenslanders are advised to use repellent, wear long sleeves, and avoid outdoor activities during peak mosquito hours. Dr. Gerrard emphasizes the importance of using repellents containing DEET, picaridin, or oil of lemon eucalyptus, as well as wearing light-colored, loose-fitting clothing covering arms, legs, and feet.
With proactive measures and community cooperation, Queenslanders can minimize the risk of Ross River Virus infections during this mosquito surge.