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    The global distribution and transmission limits of lymphatic filariasis: past and present

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    Author
    Cano, J; Rebollo, MP; Golding, N; Pullan, RL; Crellen, T; Soler, A; Kelly-Hope, LA; Lindsay, SW; Hay, SI; Bockarie, MJ; ...
    Date
    2014-10-11
    Source Title
    Parasites and Vectors
    Publisher
    BIOMED CENTRAL LTD
    University of Melbourne Author/s
    Golding, Nicholas
    Affiliation
    School of BioSciences
    Metadata
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    Document Type
    Journal Article
    Citations
    Cano, J., Rebollo, M. P., Golding, N., Pullan, R. L., Crellen, T., Soler, A., Kelly-Hope, L. A., Lindsay, S. W., Hay, S. I., Bockarie, M. J. & Brooker, S. J. (2014). The global distribution and transmission limits of lymphatic filariasis: past and present. PARASITES & VECTORS, 7 (1), https://doi.org/10.1186/s13071-014-0466-x.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/258258
    DOI
    10.1186/s13071-014-0466-x
    Abstract
    BACKGROUND: Lymphatic filariasis (LF) is one of the neglected tropical diseases targeted for global elimination by 2020 and to guide elimination efforts countries have, in recent years, conducted extensive mapping surveys. Documenting the past and present distribution of LF and its environmental limits is important for a number of reasons. Here, we present an initiative to develop a global atlas of LF and present a new global map of the limits of LF transmission. METHODS: We undertook a systematic search and assembly of prevalence data worldwide and used a suite of environmental and climatic data and boosted regression trees (BRT) modelling to map the transmission limits of LF. RESULTS: Data were identified for 66 of the 72 countries currently endemic and for a further 17 countries where LF is no longer endemic. Our map highlights a restricted and highly heterogeneous distribution in sub-Saharan Africa, with transmission more widespread in West Africa compared to east, central and southern Africa where pockets of transmission occur. Contemporary transmission occurs across much of south and South-east Asia and the Pacific. Interestingly, the risk map reflects environmental conditions suitable for LF transmission across Central and South America, including the southern States of America, although active transmission is only known in a few isolated foci. In countries that have eliminated LF, our predictions of environmental suitability are consistent with historical distribution. CONCLUSIONS: The global distribution of LF is highly heterogeneous and geographically targeted and sustained control will be required to achieve elimination. This first global map can help evaluate the progress of interventions and guide surveillance activities.

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