PMID: 19940947Nov 27, 2009Paper

The prevalence of human T-cell lymphotropic virus type 1 in the general population is unknown

AIDS Reviews
Carol HlelaGraham P Taylor

Abstract

Human T-cell lymphotropic virus type 1 prevalence estimates are usually based on serological screening of blood donors, pregnant women, and other selected population groups. Previously, data on the global epidemiology of human T-cell lymphotropic virus type 1 infection have been summarized unsystematically and without a focus on general populations. To assess the implications of the virus for healthcare systems it is essential to know its past and present prevalence. The widely cited estimate that 10-20 million people are infected with human T-cell lymphotropic virus type 1 worldwide was calculated from data that are now 25 years old. This estimate may therefore no longer reflect the global epidemiology. The objective of this study was to collate published data that are truly representative of the general population through a systematic review of the literature. Fifty-nine relevant studies were identified and the 17 that met the inclusion criteria were all cross-sectional designs; none reported incidence. The prevalence of human T-cell lymphotropic virus type 1 was highest in the two studies of Japanese islands (36.4%; 95% CI: 29.9-42.8) and lowest in studies from Mongolia, Malaysia and India. In Haiti the prevalence was 3.8% (...Continue Reading

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