St. Louis Encephalitis

Isolation of Genotype V St. Louis Encephalitis Virus in Florida

We isolated and characterized St. Louis encephalitis virus (SLEV) from cloacal swabs of naturally exposed adult sentinel chickens in 2006. Phylogenetic analysis of SLEV strains isolated in Florida indicated that Brazilian SLEV circulated in 1972 and 2006; lineages were VA and VB.

Reemergence of St. Louis Encephalitis Virus, California, 2015

St. Louis encephalitis virus infection was detected in summer 2015 in southern California after an 11-year absence, concomitant with an Arizona outbreak. Sequence comparisons showed close identity of California and Arizona isolates with 2005 Argentine isolates, suggesting introduction from South America and underscoring the value of continued arbovirus surveillance.

Serologic evidence of West Nile virus and St. Louis encephalitis virus infections in white-tailed deer (Odocoileus virginianus) from New Jersey, 2001.

Serum samples from 689 hunter-killed white-tailed deer (Odocoileus virginianus) collected during the 2001 fall hunting season in New Jersey were tested for neutralizing antibodies to West Nile virus (WNV) and St. Louis encephalitis virus (SLEV) by plaque-reduction neutralization tests. WNV-neutralizing antibodies were detected in six (0.9%) of the samples, and SLEV-neutralizing antibodies were ...

St. Louis Encephalitis Transmission of Virus to Chickens by I17fected Mites Dermanyssus Gallin&e ~ Resulting Viremia as Source of Virus

Chicken mites (Dermanyssus gallinae) collected in several localities in St. Louis County have been fbund to be infected with the virus of St. Louis encephalitis (1, 2). The infection is probably permanent since congenital transfer of the virus in these mites has been demonstrated. Persistence of the virus in nature is indicated likewise by isolation of the virus from mites collected at a single...

St. Louis encephalitis and the substantia nigra: MR imaging evaluation.

Neuroimaging findings in cases of St. Louis encephalitis (StLE) have yet to be reported despite the relatively high frequency of this entity. An epidemic permitted the documentation of isolated hyperintensity of the substantia nigra on T2-weighted images in two patients with StLE. This distribution of MR imaging abnormality in cases of StLE mirrors the reports presented in the literature that i...

Persistence of the Virus of St. Louis Encephalitis in the Central Nervous System of Mice for Over Five Months.