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Fishermen drag a net in Lake Malawi in 2012. About the size of New Jersey, the lake is home to hundreds of fish species and is considered one of the most biologically diverse lakes in the world.
May 28, 2014 The worm causes a debilitating intestinal disease called schistosomiasis. And the parasite is spreading rapidly because of an economic boom along the shores of East Africa's Lake Malawi.
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