Spatio-temporal distribution of soil-transmitted helminth infections in Brazil

Parasites & Vectors

Table 1 Data sources and properties of the predictors explored to model soil-transmitted helminth infection risk in Brazil

Data type	Source	Temporal resolution	Spatial resolution
Temperature and precipitation^a	WorldClim^b	1950-2000	1 km
Altitude	SRTM^c	2000	1 km
Soil acidity/soil moisture	ISRIC-WISE^d	1960-2000	10 km
Human influence index (HII)	LTW^e	2005	1 km
Human development index (HDI)	Atlas Brasil 2013^f	2000 and 2010	Municipality
Poor households	Atlas Brasil 2013^f	2000 and 2010	Municipality
Rurality, improved water supply, sewage system and waste treatment	Ministério da Saúde^g	2010	Municipality
Population density	GPWFE^h	2010	10 km

^aA total of 19 climatic variables related to various factors were considered.
^bWorldClim Global Climate database version 1.4; available at: http://www.worldclim.org/ (accessed: March 2012).
^cShuttle Radar Topography Mission (SRTM); available at: http://www.worldclim.org/ (accessed: March 2012).
^dGlobal soil profile data ISRIC-WISE database version 1.2; available at: http://www.isric.org/ (accessed: December 2012).
^eLast of the Wild Data version 2, 2005 (LTW-2): Global Human Footprint Dataset (Geographic). Wildlife Conservation (WCS) and Center for International Earth Science Information Network (CIESIN); available at: http://www.ciesin.org/wildareas/ (accessed: December 2013).
^fAtlas do Desenvolvimento Humano no Brasil 2013; available at: http://atlasbrasil.org.br/ (accessed: December 2013).
^gMinistério da Saúde, Brazil; available at: http://www2.datasus.gov.br/DATASUS/index.php (accessed: December 2013).
^hGridded population of the world: future estimates (GPWFE): Center for International Earth Science Information Network (CIESIN), UN Food and Agriculture Organization (FAO) and Centro Internacional de Agricultura Tropical (CIAT); available at: http://sedac.ciesin.columbia.edu/gpw (accessed: December, 2012).

ISSN: 1756-3305