The Epidemiology of Trachoma in Southern Malawi

James M. Tielsch International Center for Epidemiologic and Preventive Ophthalmology, The Johns Hopkins University, Baltimore, Maryland

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Keith P. West Jr. International Center for Epidemiologic and Preventive Ophthalmology, The Johns Hopkins University, Baltimore, Maryland

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Joanne Katz International Center for Epidemiologic and Preventive Ophthalmology, The Johns Hopkins University, Baltimore, Maryland

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Ezatollah Keyvan-Larijani International Center for Epidemiologic and Preventive Ophthalmology, The Johns Hopkins University, Baltimore, Maryland

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Teferra Tizazu International Eye Foundation, Bethesda, Maryland

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Larry Schwab International Eye Foundation, Bethesda, Maryland

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Gordon J. Johnson International Center for Eye Health, Institute of Ophthalmology, University of London, London, England

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Moses C. Chirambo Kamuzu Central Hospital, Lilongwe, Malawi

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Hugh R. Taylor International Center for Epidemiologic and Preventive Ophthalmology, The Johns Hopkins University, Baltimore, Maryland

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A population-based prevalence survey of ocular disease was conducted in the Lower Shire River Valley of Malawi in 1983. A total of 5,436 children <6 years of age and 1,664 persons ≥6 years were examined. The prevalence of inflammatory trachoma peaked in the 1–2-year-old age group at 48.7% and declined rapidly with age to <5% by age 15. The prevalence of cicatricial trachoma was low in young children and climbed gradually with age to >40% among those ≥50 years. Risk factors for inflammatory disease in young children included low socioeconomic status of the family, long walking distance to the household's primary source of water, absence of a latrine in the family compound, and presence of trachoma among siblings. Indices of crowding practices were not associated with inflammatory disease. An apparent inverse association of facewashing and inflammatory trachoma in children did not hold up when adjusted for other risk factors.

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