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Am J Trop Med Hyg. 2010 Aug;83(2 Suppl):14-21. doi: 10.4269/ajtmh.2010.09-0293.

Risk factors for severe Rift Valley fever infection in Kenya, 2007.

Author information

  • 1Ministry of Public Health and Sanitation, Nairobi, Kenya. amwayi2004@yahoo.com

Abstract

A large Rift Valley fever (RVF) outbreak occurred in Kenya from December 2006 to March 2007. We conducted a study to define risk factors associated with infection and severe disease. A total of 861 individuals from 424 households were enrolled. Two hundred and two participants (23%) had serologic evidence of acute RVF infection. Of these, 52 (26%) had severe RVF disease characterized by hemorrhagic manifestations or death. Independent risk factors for acute RVF infection were consuming or handling products from sick animals (odds ratio [OR] = 2.53, 95% confidence interval [CI] = 1.78-3.61, population attributable risk percentage [PAR%] = 19%) and being a herds person (OR 1.77, 95% CI = 1.20-2.63, PAR% = 11%). Touching an aborted animal fetus was associated with severe RVF disease (OR = 3.83, 95% CI = 1.68-9.07, PAR% = 14%). Consuming or handling products from sick animals was associated with death (OR = 3.67, 95% CI = 1.07-12.64, PAR% = 47%). Exposures related to animal contact were associated with acute RVF infection, whereas exposures to mosquitoes were not independent risk factors.

PMID:
20682901
[PubMed - indexed for MEDLINE]
PMCID:
PMC2913492
Free PMC Article

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