STUDIES ON CALIFORNIA ENCEPHALITIS IN MINNESOTA

Monath, T. P. C. (Arbovirology Unit, NCDC, Atlanta, Ga. 30333), J. G. Nuckolls, J. Berall, H. Bauer, W. A. Chappell and P. H. Coleman. Studies on California encephalitis in Minnesota. Amer. J. Epid., 1970, 92: 40–50.—An extensive serologic survey was conducted in Winona, Minnesota, an area of perenn...

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Bibliographic Details
Published in:American journal of epidemiology 1970-07, Vol.92 (1), p.40-50
Main Authors: MONATH, THOMAS P. C., NUCKOLLS, JAMES G., BERALL, JONATHAN, BAUER, HENRY, CHAPPELL, W. A., COLEMAN, PHILIP H.
Format: Article
Language:English
Subjects:
Adolescent
Adult
antibodies
Antibodies - analysis
arbovirus
Arbovirus Infections - epidemiology
California
Child
Child, Preschool
Complement Fixation Tests
encephalitis
Encephalitis - blood
Encephalitis - epidemiology
Encephalitis - immunology
Female
Hemagglutination Inhibition Tests
Humans
Male
Minnesota
Neutralization Tests
Population Surveillance
serology
Serotyping
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Summary:Monath, T. P. C. (Arbovirology Unit, NCDC, Atlanta, Ga. 30333), J. G. Nuckolls, J. Berall, H. Bauer, W. A. Chappell and P. H. Coleman. Studies on California encephalitis in Minnesota. Amer. J. Epid., 1970, 92: 40–50.—An extensive serologic survey was conducted in Winona, Minnesota, an area of perennial California group arbovirus activity, to determine the prevalence of past infection with these viruses. Hemagglutination-inhibition, complement-fixation, and neutralization tests using La Crosse antigen were performed on sera of individuals residing in urban and rural areas. Of the rural population, 13.0% had HI and 26.8% had N antibodies, whereas among urban residents only 4.0% had HI and 15.3% had N antibodies. Large increments in the prevalence of antibodies were found between ages 5–9 years among rural and ages 10–19 years among urban residents. Rural males had a higher prevalence of HI and N antibodies than rural females. No relationship of antibody to sex was noted in the urban group. HI tests on selected sera using California group viruses other than La Crosse indicated possible human infection with the Trivittatus serotype. Clinical infection with California viruses was implicated in one of 23 children with an undifferentiated febrile illness without CNS signs.
ISSN:0002-9262
1476-6256
DOI:10.1093/oxfordjournals.aje.a121178