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Updated: Aug 9, 2026
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In Vivo Imaging Systems (IVIS) Detection of a Neuro-Invasive Encephalitic Virus
Published on: December 2, 2012
Murray Valley encephalitis acquired in Western Australia
1Department of Clinical Microbiology, Queen Elizabeth II Medical Centre, Nedlands, WA.
The Medical Journal of Australia
|June 17, 1991
Summary
A fatal case of encephalitis in an Aboriginal boy was linked to Murray Valley encephalitis (MVE) virus following Haemophilus influenzae type b meningitis. This case highlights the potential for severe MVE outcomes in Western Australia.
Area of Science:
- Medical Microbiology
- Virology
- Epidemiology
Background:
- Murray Valley encephalitis (MVE) is a mosquito-borne viral disease endemic to Australia.
- Encephalitis is a serious inflammation of the brain, often caused by infections.
Observation:
- An 18-month-old Aboriginal boy in Western Australia developed meningitis caused by Haemophilus influenzae type b.
- Despite antibiotic treatment, the child relapsed and subsequently died with symptoms of encephalitis.
Findings:
- Post-mortem analysis revealed high antibody titers to MVE virus, including specific IgM, indicating recent infection.
- No other infectious agents were identified as the cause of encephalitis.
- Culex annulirostris mosquitoes, a known MVE vector, were prevalent in the area, and sentinel chickens showed MVE antibodies.
Implications:
- This case represents the second reported MVE-related fatality in Western Australia.
- The findings suggest a potential link between bacterial meningitis and subsequent MVE infection, leading to fatal encephalitis.
- The study underscores the importance of MVE surveillance, especially in regions with identified vector populations and environmental indicators.
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