It is being urged to kill mosquitoes in Cairns, due to a positive test to Zika virus after resident returning from overseas.
A Tropical Public Health Services spokeswoman said the diagnosis was confirmed on Friday, with spraying taking place in Gordonvale over the weekend and continuing on Monday.
Zika is only known to be spread by the Aedes Aegypti mosquito, which is confined to Australia’s north, including Cairns.
The woman had been travelling in Thailand and Bali and authorities said the case was acquired overseas.
The DART team was working to make sure local mosquitos didn’t become infected.
“I urge all Gordonvale residents to cooperate with the usual control activities including spraying inside and around their homes,” TPHS director Richard Gair said.
“DART is working in the suburb, and will continue the response over the next few days until the required area has been treated.”
Dr Gair said if local mosquitoes had bitten the affected resident, they would not become infectious until the middle of the week.
Zika is usually mild, with symptoms less severe than the more commonly spread dengue virus, but has been linked to microcephaly, which can cause babies to be born with small heads and underdeveloped brains.
In April, the US Centers for Disease Control and Prevention confirmed there was “no longer any doubt” Zika caused the congenital disease.
Dr Gair urged residents to kill mosquitoes, not just tip out breeding sites.