Venezuela: Illegal mining and the resurgence of malaria

Both legal and illegal mining create the perfect conditions for malaria to resurface and spread. “There is a large number of miners drilling holes in search of minerals. These holes with stagnant water are breeding grounds for mosquitoes,” says Jo Lines, a reader of malaria control and vector biology at the London School of Hygiene & Tropical Medicine.
But cases of malaria are much harder to control among those working illegally, adds Lines. “The majority of self-employed miners are mobile [increasing the risk of imported malaria infections], and they are often reluctant to present themselves to official medical facilities due to immigration and work permit issues. They often live in cheap, crowded places without walls, where it is not easy to hang a bednet.”
http://www.theguardian.com/global-development-professionals-network/2014/dec/02/valuing-amazonian-land-voices-tackling-malaria-venezuela