Fig. 5

Biplot of environmental and socioeconomic determinants of human leptospirosis and sites of the Urban Agglomaration of Santa Fe (UA of Santa Fe) based on a Principal Component Analysis. Sites of the UA of Santa Fe are represented by points. Determinants for human leptospirosis are represented by arrows. Arrow orientation represent the direction of the steepest increase of the determinant. Arrow length indicates the relative importance of determinants in the model, the angle between arrows and axes indicates the degree of correlation between them. Socioeconomic determinants: Proportion of housings without indoor water supply (“indoor_water_sp”), solid roof (“roof”), latrine (“latrine”), and with the head of household with a high school education or more (“high_sch_more”). Environmental determinants: elevation (“elevation”), distance to channel (“dist_to_channel”), water bodies (“dist_to_wb”), proportion of water bodies (“prop_wb”), high vegetation (“high_veg”), impervious (built-up) surface, number of patches (“patches”) and Shannon diversity (“shan_div”)