West Nile virus disease: a descriptive study of 228 patients hospitalized in a 4-county region of Colorado in 2003 - PubMed (original) (raw)
. 2006 May 1;42(9):1234-40.
doi: 10.1086/503038. Epub 2006 Mar 30.
Affiliations
- PMID: 16586381
- DOI: 10.1086/503038
West Nile virus disease: a descriptive study of 228 patients hospitalized in a 4-county region of Colorado in 2003
Amy V Bode et al. Clin Infect Dis. 2006.
Abstract
Background: Risk factors for complications of West Nile virus disease and prognosis in hospitalized patients are incompletely understood.
Methods: Demographic characteristics and data regarding potential risk factors, hospitalization, and dispositions were abstracted from medical records for residents of 4 Colorado counties who were hospitalized in 2003 with West Nile virus disease. Univariate and multivariate analyses were used to identify factors associated with West Nile encephalitis (WNE), limb weakness, or death by comparing factors among persons with the outcome of interest with factors among those without the outcome of interest.
Results: Medical records of 221 patients were reviewed; 103 had West Nile meningitis, 65 had WNE, and 53 had West Nile fever. Respiratory failure, limb weakness, and cardiac arrhythmia occurred in all groups, with significantly more cases of each in the WNE group. Age, alcohol abuse, and diabetes were associated with WNE. Age and WNE were associated with limb weakness. The mortality rate in the WNE group was 18%; age, immunosuppression, requirement of mechanical ventilation, and history of stroke were associated with death. Only 21% of patients with WNE who survived returned to a prehospitalization level of function. The estimated incidence of West Nile fever cases that required hospitalization was 6.0 cases per 100,000 persons; West Nile fever was associated with arrhythmia, limb weakness, and respiratory failure.
Conclusions: Persons with diabetes and a reported history of alcohol abuse and older persons appear to be at increased risk of developing WNE. Patients with WNE who have a history of stroke, who require mechanical ventilation, or who are immunosuppressed appear to be more likely to die. Respiratory failure, limb weakness, and arrhythmia occurred in all 3 categories, but there were significantly more cases of all in the WNE group.
Comment in
- Rash as a prognostic factor in West Nile virus disease.
Huhn GD, Dworkin MS. Huhn GD, et al. Clin Infect Dis. 2006 Aug 1;43(3):388-9. doi: 10.1086/505606. Clin Infect Dis. 2006. PMID: 16804861 No abstract available.
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