PMID- 2899060 OWN - NLM STAT- MEDLINE DCOM- 19880817 LR - 20190708 IS - 0020-7136 (Print) IS - 0020-7136 (Linking) VI - 42 IP - 1 DP - 1988 Jul 15 TI - Geographic distribution of HTLV-I and identification of a new high-risk population. PG - 7-12 AB - Epidemiologic studies indicate that human T-cell lymphotropic virus type I (HTLV-I), the causative agent of most cases of adult T-cell leukemia/lymphoma (ATLL) in Southeast Japan and the Caribbean islands and the probable cause of a progressive neurological disorder often referred to as tropical spastic paraparesis, occurs with unusual geographic clustering. The current large-scale serosurvey was undertaken to improve our understanding of HTLV-I prevalence in different parts of the world. We analyzed 43,445 serum samples collected from various geographic locales worldwide; 76% of these sera came from clinically healthy donors. Samples were initially screened by an enzyme-linked immunosorbent assay (ELISA) and 4,353 were further evaluated by means of competition assays. In this study, which did not include sera from endemic areas of Japan, a high prevalence of infection was observed in several countries in the Caribbean basin. A significant age-sex difference was observed between populations in the Caribbean and non-endemic regions of Japan. The reason for the male excess in non-endemic areas of Japan will require further study, while the female excess in the Caribbean basin is compatible with the previously described pattern for other HTLV-I-endemic areas. A newly recognized area of possible endemicity was southern Florida, where evidence of infection with HTLV-I or a related virus was found in a group of native Americans whose sera were collected in 1968. In certain parts of the world, particularly sub-Saharan Africa, important problems in determining specificity of reactivity occurred, probably because of cross-reacting antibodies. No pattern was detected that could explain the cross-reactivity solely on the basis of geographic areas, specific patterns of non-viral parasitic infection, or methods of handling the specimens. It is possible that these cross-reactivities are antibodies to proteins from HTLV-I-related retroviruses yet to be discovered. FAU - Levine, P H AU - Levine PH AD - Environmental Epidemiology Branch, National Institutes of Health, Bethesda, MD 20892. FAU - Blattner, W A AU - Blattner WA FAU - Clark, J AU - Clark J FAU - Tarone, R AU - Tarone R FAU - Maloney, E M AU - Maloney EM FAU - Murphy, E M AU - Murphy EM FAU - Gallo, R C AU - Gallo RC FAU - Robert-Guroff, M AU - Robert-Guroff M FAU - Saxinger, W C AU - Saxinger WC LA - eng GR - 1-CP-21007-00/CP/NCI NIH HHS/United States GR - 1-CP-61003/CP/NCI NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Int J Cancer JT - International journal of cancer JID - 0042124 SB - IM MH - Adult MH - Africa MH - Aged MH - Cross Reactions MH - Deltaretrovirus Infections/*epidemiology MH - Epidemiologic Methods MH - Female MH - Florida MH - Global Health MH - Humans MH - Japan MH - Male MH - Middle Aged MH - Risk Factors MH - Sex Factors MH - West Indies EDAT- 1988/07/15 00:00 MHDA- 1988/07/15 00:01 CRDT- 1988/07/15 00:00 PHST- 1988/07/15 00:00 [pubmed] PHST- 1988/07/15 00:01 [medline] PHST- 1988/07/15 00:00 [entrez] AID - 10.1002/ijc.2910420103 [doi] PST - ppublish SO - Int J Cancer. 1988 Jul 15;42(1):7-12. doi: 10.1002/ijc.2910420103.