Epidemiologic aspects of a St. Louis encephalitis outbreak in Mesa County, Colorado
| Autor: | J. K. Emerson, Theodore F. Tsai, G. C. Smith, R. E. Bailey, W. B. Cobb, J. J. Doran, R. A. Bolin, K. J. Lampert, J. D. Poland, N. J. Gilman |
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| Rok vydání: | 1987 |
| Předmět: |
Adult
Male medicine.medical_specialty Colorado Adolescent Epidemiology Encephalitis Virus St. Louis Antibodies Viral Disease Outbreaks Sex Factors Encephalitis Viruses Medicine Humans Child Aged biology Encephalitis St. Louis business.industry Transmission (medicine) St louis encephalitis Age Factors Outbreak Middle Aged medicine.disease Virology Immunoglobulin A Culicidae Immunoglobulin M biology.protein Saint Louis encephalitis Female business Epidemiologic Methods Encephalitis |
| Zdroj: | American journal of epidemiology. 126(3) |
| ISSN: | 0002-9262 |
| Popis: | An epidemic of St. Louis encephalitis in 1985 in Mesa County, Colorado, led to 17 cases, including one fatality. Risk was associated with advanced age and residence in Grand Junction, the county's principal city. A trend was observed toward higher risk in females. However, increased risk in females was not associated with higher infection rates (increased exposure). Capture enzyme immunoassays detected specific immunoglobulin M (IgM) and immunoglobulin A after infection. A serosurvey of Grand Junction residents disclosed an infection rate of 4.0%, indicating that 1,123 epidemic St. Louis encephalitis infections may have occurred in the city. Evidence of previous St. Louis encephalitis virus infection was found in 11.2% of survey respondents who had neutralizing antibody to the virus without specific IgM. The prevalence of St. Louis encephalitis virus antibody was similar to rates observed in serosurveys undertaken 30 years earlier, indicating that the level of endemic St. Louis encephalitis transmission in the city had not changed appreciably in that interval. |
| Databáze: | OpenAIRE |
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