Article
Genotypic and phenotypic variation of selected Saint Louis encephalitis viral strains isolated in California.
The American journal of tropical medicine and hygiene - 1 Aug 1997
Kramer L D, Presser S B, Hardy J L, Jackson A O
Abstract excerpt
The mechanism for long-term maintenance of St. Louis encephalitis (SLE) virus in California is unknown. Two possibilities are 1) that the virus is maintained locally in discrete enzootic foci by one or more reservoir mechanisms, and/or 2) that the foci are ephemeral in nature and virus is reintroduced periodically from other enzootic areas by migratory birds or movement of vectors. We have investigated these...
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