Open AccessNewly Recognized Focus of La Crosse Encephalitis in Tennessee
Author(s) -
Timothy F. Jones,
Allen S. Craig,
Roger S. Nasci,
L. E. R. Patterson,
Paul C. Erwin,
Reid R. Gerhardt,
Xilla T. Ussery,
William Schaffner
Publication year - 1999
Publication title -
clinical infectious diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.44
H-Index - 336
eISSN - 1537-6591
pISSN - 1058-4838
DOI - 10.1086/515087
Subject(s) - arbovirus , encephalitis , virology , medicine , aedes albopictus , chikungunya , cluster (spacecraft) , virus , biology , aedes aegypti , ecology , larva , computer science , programming language
La Crosse virus is a mosquito-borne arbovirus that causes encephalitis in children. Only nine cases were reported in Tennessee during the 33-year period from 1964-1996. We investigated a cluster of La Crosse encephalitis cases in eastern Tennessee in 1997. Medical records of all suspected cases of La Crosse virus infection at a pediatric referral hospital were reviewed, and surveillance was enhanced in the region. Previous unreported cases were identified by surveying 20 hospitals in the surrounding 16 counties. Mosquito eggs were collected from five sites. Ten cases of La Crosse encephalitis were serologically confirmed. None of the patients had been discharged from hospitals in the region with diagnosed La Crosse encephalitis in the preceding 5 years. Aedes triseriatus and Aedes albopictus were collected at the case sites; none of the mosquitos had detectable La Crosse virus. This cluster may represent an extension of a recently identified endemic focus of La Crosse virus infection in West Virginia.
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