Murray Valley encephalitis public health alert

Published 11 May 2023

People in the Big Rivers region are urged to protect themselves and their children from mosquitos following Murray Valley encephalitis (MVE) cases.

Territorians and visitors to the Northern Territory (NT) are being urged to protect themselves and children from mosquito bites following a recent death from MVE in the Big Rivers region.

This is one of 2 recent cases in the Big Rivers region, both in young infants - and there have now been 4 cases of MVE in the NT this year (in Big Rivers, Top End, and Barkly).

MVE is an uncommon but potentially fatal disease that occurs after being bitten by a mosquito carrying the MVE virus. It can be fatal in up to 30% of cases.

The symptoms of MVE include severe headaches, high fever, drowsiness, tremor, seizures (especially in young children), and in some cases the disease can progress to delirium, coma, permanent brain damage or death.

To protect yourself and children from mosquitoes, you should:

• use a protective repellent containing DEET, Picaridin or oil of lemon eucalyptus (PMD)
• use an appropriate repellent for children. Always follow the instructions on the label and apply it safely. From the age of 2 months onwards, repellents containing 10% DEET can be used, and from the age of 12 months, repellents containing Picaridin can be used. PMD can be used from 3 years of age. Repellents are not recommended for children under 2 months of age
• wear light-coloured protective clothing (long sleeves, trousers, socks) when outdoors in mosquito prone areas and ensure that children’s arms and legs are covered
• avoid outdoor exposure around dusk and dawn, and at night near areas of dense vegetation or areas of high mosquito activity
• use mosquito-proof accommodation and camping facilities at night
• use mosquito coils, mosquito lanterns and barrier sprays containing bifenthrin in patio and outdoor areas near houses
• use mosquito proof netting over prams and strollers.

To find out more about MVE, go to the Northern Territory Government website.