Prediction of hookworm prevalence in southern India using environmental parameters derived from Landsat 8 remotely sensed data

Kulinkina, Alexandra V., Sarkar, Rajiv, Mohan, Venkata R., Walz, Yvonne, Kaliappan, Saravanakumar P., Ajjampur, Sitara S.R., Ward, Honorine, Naumova, Elena N. and Kang, Gagandeep, (2019). Prediction of hookworm prevalence in southern India using environmental parameters derived from Landsat 8 remotely sensed data. International Journal for Parasitology, 1-8

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  • Sub-type Journal article
    Author Kulinkina, Alexandra V.
    Sarkar, Rajiv
    Mohan, Venkata R.
    Walz, Yvonne
    Kaliappan, Saravanakumar P.
    Ajjampur, Sitara S.R.
    Ward, Honorine
    Naumova, Elena N.
    Kang, Gagandeep
    Title Prediction of hookworm prevalence in southern India using environmental parameters derived from Landsat 8 remotely sensed data
    Appearing in International Journal for Parasitology
    Publication Date 2019
    Place of Publication Amsterdam
    Publisher Elsevier Ltd.
    Start page 1
    End page 8
    Language eng
    Abstract Soil-transmitted helminth infections propagate poverty and slow economic growth in low-income countries. As with many other neglected tropical diseases, environmental conditions are important determinants of soil-transmitted helminth transmission. Hence, remotely sensed data are commonly utilised in spatial risk models intended to inform control strategies. In the present study, we build upon the existing modelling approaches by utilising fine spatial resolution Landsat 8 remotely sensed data in combination with topographic variables to predict hookworm prevalence in a hilly tribal area in southern India. Hookworm prevalence data collected from two field surveys were used in a random forest model to investigate the predictive capacity of 15 environmental variables derived from two remotely sensed images acquired during dry and rainy seasons. A variable buffer radius (100–1000 m) was applied to the point-prevalence locations in order to integrate environmental conditions around the village centroids into the modelling approach and understand where transmission is more likely. Elevation and slope were the most important variables in the models, with lower elevation and higher slope correlating with higher transmission risk. A modified normalised difference water index was among other recurring important variables, likely responsible for some seasonal differences in model performance. The 300 m buffer distance produced the best model performance in this setting, with another spike at 700 m, and a marked drop-off in R2 values at 1000 m. In addition to assessing a large number of environmental correlates with hookworm transmission, the study contributes to the development of standardised methods of spatial linkage of continuous environmental data with point-based disease prevalence measures for the purpose of spatially explicit risk profiling.
    UNBIS Thesaurus INDIA
    REMOTE SENSING
    Keyword Hookworm
    Soil-transmitted helminths
    Spatial modelling
    Copyright Holder Australian Society for Parasitology
    Copyright Year 2019
    Copyright type All rights reserved
    DOI 10.1016/j.ijpara.2019.10.001
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    Created: Wed, 15 Jan 2020, 19:41:57 JST by Aarti Basnyat on behalf of UNU EHS