Monday 7 February
Higher than average rainfall this wet season, along with predicted extreme weather in Central Australia following cyclone Yasi has prompted the Department of Health to issue a Murray Valley encephalitis (MVE) and Kunjin virus disease warning for the whole of the NT.
DoH Director of Entomology, Peter Whelan says all Territorians are being urged to take precautions against MVE, Kunjin and other mosquito-borne diseases.
"The main risk period for MVE and Kunjin disease is February to July, and the carrier of both is the common banded mosquito, Culex annulirostris. This species can also spread Ross River virus, which is most prevalent from December to March each year," Mr Whelan said.
"MVE is endemic in the northern two thirds of the Territory, and extends into southern NT during wetter than average summer rainfall.
"Increased numbers of common banded mosquito can be experienced in the NT at this time of year within five kilometres of freshwater creeks, flood plains and swamps, and seasonally flooded inland areas.
MVE is the most dangerous endemic mosquito borne disease in the NT. Usual symptoms of MVE include:
- severe headache
- high fever
- drowsiness
- tremor and seizures, especially in young children
"In some cases the condition progresses to delirium and coma, leading to paralysis or brain damage," Mr Whelan said.
"Despite best care, 25 per cent of people die from the infection and at least 25 per cent will have residual neurological effects.
"Kunjin virus causes a disease with high fever, headache, muscle pain, lethargy and sometimes rash, but more serious complications such as encephalitis are relatively rare.
"People most at risk include campers, babies and young children who reside near problem areas. People in small or remote communities and anyone visiting parks and recreation areas where mosquitoes may be active are also at greater risk of contracting a mosquito-borne disease."
To avoid getting bitten by mosquitoes, people are advised to:
- avoid problem areas or outside exposure after sundown
- wear protective, light-coloured clothing with long sleeves, long trousers and socks between dusk and dawn
- use mosquito-proof tents when camping
- use protective repellent containing diethyl-toluamide (DEET) or picaridin or use other mosquito protection devices when outside in mosquito-prone areas.
Media contact: Bridget Wild 89 992 751 or 0401 116 144
