Murray Valley encephalitis

Mur·ray Val·ley en·ceph·a·li·tis

a severe encephalitis with a high mortality rate occurring in the Murray Valley of Australia; the disease is most severe in children and is characterized by headache, fever, malaise, drowsiness or convulsions, and rigidity of the neck; extensive brain damage may result; it is caused by the Murray Valley encephalitis virus (genus Flavivirus). Synonym(s): Australian X disease, Australian X encephalitis

Murray Valley encephalitis

A rare, Japanese encephalitis-like disease caused by a flavivirus-group B togavirus, which occurs in small epidemic clusters in Murray Valley and elsewhere in Victoria and New South Wales, Australia. It is maintained by a cycle between wild birds and mosquitoes (Culex annulirostris), and is favoured by hot weather.

Clinical findings
Usually asymptomatic; if symptomatic, fever, headache, nausea, vomiting, loss of appetite, diarrhoea, muscle aches. Neurological changes, if present, include severe headache, neck stiffness, photophobia, drowsiness and confusion. Rare cases may be characterised by co-ordination and speech defects, seizures, loss of consciousness, coma and death; the latter cases may have residual neurologic dysfunction.

Mur·ray Val·ley en·ceph·a·li·tis

(mŭr'ē val'ē en-sef'ă-līt'is) A severe encephalitis with a high mortality rate occurring in the Murray Valley of Australia; the disease is most severe in children and is characterized by headache, fever, malaise, drowsiness or convulsions, and rigidity of the neck; extensive brain damage may result; it is caused by the Murray Valley encephalitis virus (genus Flavivirus).
Synonym(s): Australian X disease.

Murray Valley,

location in Australia where epidemics occurred in 1950 and 1951. Murray Valley disease - Synonym(s): Murray Valley encephalitisMurray Valley encephalitis - a severe encephalitis with high mortality. Synonym(s): Australian X disease; Australian X encephalitis; Murray Valley diseaseMurray Valley virus - a group B arbovirus that causes Murray Valley encephalitis. Synonym(s): Australian X disease virus; MVE virus

单词	murray valley encephalitis
释义	DictionarySeeencephalitis Murray Valley encephalitis Murray Valley encephalitis [′mər·ē ¦val·ē in‚sef·ə′līd·əs] (medicine) An acute inflammation of the brain and spinal cord caused by a virus; confined to Australia and New Guinea. Also known as Australian X disease. Murray Valley encephalitis Mur·ray Val·ley en·ceph·a·li·tis a severe encephalitis with a high mortality rate occurring in the Murray Valley of Australia; the disease is most severe in children and is characterized by headache, fever, malaise, drowsiness or convulsions, and rigidity of the neck; extensive brain damage may result; it is caused by the Murray Valley encephalitis virus (genus Flavivirus). Synonym(s): Australian X disease, Australian X encephalitis Murray Valley encephalitis A rare, Japanese encephalitis-like disease caused by a flavivirus-group B togavirus, which occurs in small epidemic clusters in Murray Valley and elsewhere in Victoria and New South Wales, Australia. It is maintained by a cycle between wild birds and mosquitoes (Culex annulirostris), and is favoured by hot weather. Clinical findings Usually asymptomatic; if symptomatic, fever, headache, nausea, vomiting, loss of appetite, diarrhoea, muscle aches. Neurological changes, if present, include severe headache, neck stiffness, photophobia, drowsiness and confusion. Rare cases may be characterised by co-ordination and speech defects, seizures, loss of consciousness, coma and death; the latter cases may have residual neurologic dysfunction. Mur·ray Val·ley en·ceph·a·li·tis (mŭr'ē val'ē en-sef'ă-līt'is) A severe encephalitis with a high mortality rate occurring in the Murray Valley of Australia; the disease is most severe in children and is characterized by headache, fever, malaise, drowsiness or convulsions, and rigidity of the neck; extensive brain damage may result; it is caused by the Murray Valley encephalitis virus (genus Flavivirus). Synonym(s): Australian X disease. Murray Valley, location in Australia where epidemics occurred in 1950 and 1951. Murray Valley disease - Synonym(s): Murray Valley encephalitisMurray Valley encephalitis - a severe encephalitis with high mortality. Synonym(s): Australian X disease; Australian X encephalitis; Murray Valley diseaseMurray Valley virus - a group B arbovirus that causes Murray Valley encephalitis. Synonym(s): Australian X disease virus; MVE virus See MVE See MVE
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