Health officials have recorded two cases of Japanese encephalitis in the Northern Territory, including a historical case from last year.
In a statement released on Tuesday, NT Health confirmed a child in the Top End had been infected with the virus after becoming symptomatic in June.
It said the child had made a "good recovery", however was characterised as a current case.
Authorities also said a man, aged in his 70s and who was visiting the Top End from Victoria in May last year was infected with the virus, and has since made a full recovery.
They are the second and third cases of the potentially deadly virus detected in the Northern Territory, following the death of a woman in February 2021.
The latest cases come amid concerns from residents of feral pigs roaming close to homes on the outskirts of Darwin.
The most recent figures from July 19 show there have been 40 human cases of Japanese encephalitis recorded in Australia, including five deaths in the recent outbreak.
In March, it was declared a 'Communicable Disease Incident of National Significance' by the federal government's Acting Chief Medical Officer Dr Sonya Bennett.
As part of its response to the increase in cases, the Commonwealth expanded its vaccination program against the virus.
Japanese encephalitis cannot be spread from person to person, instead only being transmitted by mosquito bites.
Symptoms include headaches, fever, seizures, joint stiffness and drowsiness, and in severe cases neurological issues, convulsions and reduced consciousness, according to NT Health.
The virus can also infect animals, with NT Health detecting 52 feral pigs infected with the virus in Victoria Daly, Litchfield, Marrakai-Douglas Daly, Cox-Daly and West Arnhem regions, and on the Tiwi Islands.
NT Health is recommending people to wear loose-fitting clothing and enclosed shoes, apply insect repellent with ingredients including either DEET, Pircaridin or lemon eucalyptus extract on skin while outdoors, and avoid going outside around dawn and dusk.
