title: Snail-paced parasite that is marching through South America.
mesh_terms: D001700:Biomphalaria / Q000469:parasitology*; D001938:Brazil; D006801:Humans; D012550:Schistosoma mansoni; D012552:Schistosomiasis / Q000469:parasitology / Q000517:prevention & control / Q000635:transmission*; D014171:Transients and Migrants