Mystery of tropical human parasite swimming solved

For several years Manu Prakash, an assistant professor of bioengineering, has gone to field sites to test new, low-cost microscopes as a tool for diagnosing the parasitic disease schistosomiasis. The devices showed promise, but Prakash was perplexed by how often kids treated for the disease were getting re-infected. Prakash quickly turned his attention to preventing infections at the first place.