West Nile Virus Infection Among Health-Fair Participants, Wyoming 2003: Assessment of Symptoms and Risk Factors
| Autor: | Richard W. Harris, Tracy D. Murphy, Sandra L. Novick, Scott A. Seys, Joe Grandpre, Karl Musgrave |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Adult
Male Wyoming medicine.medical_specialty Adolescent West Nile virus animal diseases viruses Antibodies Viral medicine.disease_cause Microbiology stomatognathic system Risk Factors Seroepidemiologic Studies Virology Environmental health Epidemiology Confidence Intervals Odds Ratio medicine Humans Seroprevalence Child Health fairs Aged Aged 80 and over West Nile Virus Infection Muscle Weakness business.industry virus diseases Exanthema Middle Aged Health Surveys nervous system diseases Infectious Diseases Immunoglobulin M Immunoglobulin G Female business West Nile Fever |
| Zdroj: | Vector-Borne and Zoonotic Diseases. 5:246-251 |
| ISSN: | 1557-7759 1530-3667 |
| DOI: | 10.1089/vbz.2005.5.246 |
| Popis: | Wyoming experienced heavy West Nile virus (WNV) activity for the first time in 2003 and the area hardest hit was Goshen County. Little was known about the epidemiology of WNV in this region. This study describes the symptomatology of WNV and the association between certain behaviors and infection in Goshen County. Study participants were recruited from attendees of a health-fair sponsored by a local hospital, held October 1-3, 2003. A blood sample for WNV testing was obtained from each participant, and participants completed a questionnaire seeking information about the presence of specified symptoms consistent with WNV infection and risk factors possibly associated with infection. The samples were tested for anti-WNV IgM and IgG at the Wyoming Public Health Laboratory. Eight-hundred sixty-nine residents of Goshen County participated, and 122 (14.0%) were seropositive for anti-WNV IgM or IgG. Sixty (59.4%) of 101 persons seropositive for anti-WNV IgM experienced at least one symptom in the previous 4 months consistent with WNV infection, compared with 323 (43.2%) of 747 seronegative persons, resulting in an attributable risk of WNV seropositivity of 16.2%. Of the many symptoms queried, muscle aches (OR 2.63, 95% CI 1.69-4.09), skin rash (OR 6.35, 95% CI 3.74-10.80), fever (OR 2.56, 95% Cl 1.50-4.36), and muscle weakness (OR 2.33, 95% CI 1.34-4.02) were significantly associated with seropositivity on univariate analysis. By multivariate analysis, only skin rash remained significant. Risk factor analysis showed those spendingor =3 hours outside per day were more likely to be seropositive than those spending less time outside per day ( p0.05). This study corroborates the belief that a minority of persons infected with WNV develop symptoms attributable to WNV, and also demonstrates that some symptoms are more significantly associated with infection than others. |
| Databáze: | OpenAIRE |
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