Murray Valley encephalitis: a review of clinical features, diagnosis and treatment

James Knox, Raquel Cowan, Joseph Doyle, Matthew Ligtermoet, John Archer, James Burrow, Steven Tong, Bart Currie, John mackenzie, David Smith, Michael Catton, Rodney Moran, Craig Aboltins, Jack Richards

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    47 Citations (Scopus)

    Abstract

    Murray Valley encephalitis virus (MVEV) is a mosquitoborne virus that is found across Australia, Papua New Guinea and Irian Jaya. MVEV is endemic to northern Australia and causes occasional outbreaks across south-eastern Australia. 2011 saw a dramatic increase in MVEV activity in endemic regions and the re-emergence of MVEV in south-eastern Australia. This followed significant regional flooding and increased numbers of the main mosquito vector, Culex annulirostris, and was evident from the widespread seroconversion of sentinel chickens, fatalities among horses and several cases in humans, resulting in least three deaths. The last major outbreak in Australia was in 1974, during which 58 cases were identified and the mortality rate was about 20%. With the potential for a further outbreak of MVEV in the 2011-2012 summer and following autumn, we highlight the importance of this disease, its clinical characteristics and radiological and laboratory features. We present a suspected but unproven case of MVEV infection to illustrate some of the challenges in clinical management. It remains difficult to establish an early diagnosis of MVEV infection, and there is a lack of proven therapeutic options.

    Original languageEnglish
    Pages (from-to)322-326
    Number of pages5
    JournalMedical Journal of Australia
    Volume196
    Issue number5
    DOIs
    Publication statusPublished - 2012

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    Knox, J., Cowan, R., Doyle, J., Ligtermoet, M., Archer, J., Burrow, J., Tong, S., Currie, B., mackenzie, J., Smith, D., Catton, M., Moran, R., Aboltins, C., & Richards, J. (2012). Murray Valley encephalitis: a review of clinical features, diagnosis and treatment. Medical Journal of Australia, 196(5), 322-326. https://doi.org/10.5694/mja11.11026