From July 25 to October 1, 1999, 826 patients were admitted to Volgograd Region, Russia, hospitals with acute aseptic meningoencephalitis, meningitis, or fever consistent with arboviral infection. Of 84 cases of meningoencephalitis, 40 were fatal. Fourteen brain specimens were positive in reverse transcriptase-polymerase chain reaction assays, confirming the presence of West Nile/Kunjin virus.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2631674PMC
http://dx.doi.org/10.3201/eid0701.010118DOI Listing

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