Abstract
Summary
The virus of St. Louis encephalitis was isolated from a fatal human case of encephalitis in California. This represents the first isolation of this virus from any vertebrate host outside the endemic St. Louis area, and the second isolation of this virus in California.
It is considered probable that the patient acquired his infection in Kern County, where Hammon and Reeves have shown the existence of naturally infected mosquitoes.
The pathogenic properties of the virus are described and discussed.
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