An article from ABC News :
" The Northern Territory Health Department says the Territory's first case of dengue fever in 70 years is a complete mystery.
The department says the mosquito that carries dengue fever does not exist in the Territory.
It is therefore at a loss to explain how a man who did not travel outside of the Territory contracted the virus.
Dr Vicki Krause from the Centre for Disease Control says her only explanation is a dengue mosquito may have come into the Territory by ship or cargo.
"At this time we do not think that this is a risk to the public; that it does appear to be a one-off case," she said.
"Extensive mosquito trapping has occurred and we have not found any mosquitoes that are capable of spreading the dengue virus so it does appear to be a sporadic case."
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