1921
Volume 68, Issue 6
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645

Abstract

To determine the proportion of acute undifferentiated fevers without neurologic deficits related to infection with Japanese encephalitis (JE) virus, flavivirus serology (dengue and JE) was performed in a cohort of 156 adults presenting to a hospital in Chiangrai, Thailand. Recent flavivirus infection was diagnosed for any individual with an IgM result > 40 units. A ratio of dengue virus IgM to JE virus IgM < 0.91 defined a JE virus infection. Diagnostic criteria for Japanese encephalitis were met in 22 individuals (14%), and were unequivocal in 8 patients. The admission findings in these eight subjects were similar to those described for other flavivirus infections. Thrombocytopenia was the most striking laboratory abnormality (median platelet count = 119,000/mm, range = 44,000–236,000/mm). Headache (75%), nausea (50%), myalgia (38%), rash (38%), and diarrhea (25%) were the most frequently encountered signs and symptoms. Infection with Japanese encephalitis virus is an underappreciated cause of acute undifferentiated fever in Asia.

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  • Received : 14 Oct 2002
  • Accepted : 02 Apr 2003

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