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American Journal of Epidemiology Vol. 87, No. 3: 530-538
Copyright © 1968 by The Johns Hopkins University School of Hygiene and Public Health

research-article

ISOLATIONS OF ST. LOUIS ENCEPHALITIS VIRUS FROM POST-MORTEM TISSUES OF HUMAN CASES IN THE 1962 FLORIDA EPIDEMIC

P. H. COLEMAN1, A. L. LEWIS2, N. J. SCHNEIDER3 and T. H. WORK4 1

1U. S. Public Health Service, Bureau of Disease Prevention and Environmental Control, National Communicable Disease Center Atlanta, Georgia 30333
2Florida State Board of Health, Encephalitis Research Center Tampa, Florida
3Florida State Board of Health, Bureau of Laboratories Jacksonville, Florida
4University of California at Los Angeles, School of Public Health Los Angeles, California

Coleman, P. H. (National Communicable Disease Center, Atlanta, Ga. 30333), A. L. Lewis, N. J. Schneider, and T. H. Work. Isolations of St. Louis encephalitis virus from post-mortem tissues of human cases in the 1962 Florida epidemic Amer. J. Epid. 1968, 87: 530–538.—During the epidemic of St. Louis encephalitis (SLE) in the Tampa Bay area of Florida in 1962, virus isolations were attempted in mice with 91 spinal fluids, 12 acute sera and 13 case specimens obtained at autopsy. No viruses were isolated from the spinal fluids or acute sera. Four isolates were obtained from post-mortem tissues; three from brain and one from spleen. Case histories are given for the four individuals who yielded virus and the isolation procedures are discussed. The four isolates were tested serologkally by hemagglutination, complement fixation, mouse neutralization and mouse protection tests to determine their relationship to various group B arboviruses including six known strains of SLE virus and 11 non-SLE group B arboviruses. Antigenically, the four isolates were shown to be SLE virus.

5The authors gratefully acknowledge all of the virology staff members of the Florida State Board of Health, the Encephalitis Research Center, and the National Communicable Disease Center whose technical assistance contributed so greatly to these studies.


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