Population movement: a key factor in the epidemiology of neglected tropical diseases.

This review provides an overview of the complex ways in which population movements are linked to spread and control of neglected tropical diseases – often exacerbated by insufficient medical services and sanitary infrastructure. A new typology of population movements is suggested which builds on previous work but offers a more comprehensive typology based on the variables of 'onset', 'cause', 'direction' and 'motivation'. Schistosomiasis and leishmaniasis provide examples of the intricate ways in which population movements may play a role. A thorough and context-specific understanding of these patterns combined with the ability and will to launch targeted public health interventions is needed to achieve adequate control of neglected tropical diseases as well as other infectious diseases.