Schistosoma mansoni and Schistosoma haematobium: emergence of schistosome cercariae from snails with darkness and illumination.
D000818:Animals; D001700:Biomphalaria / Q000469:parasitology*; D002033:Bulinus / Q000469:parasitology*; D002940:Circadian Rhythm; D003624:Darkness; D008027:Light; D012548:Schistosoma haematobium / Q000502:physiology*; D012550:Schistosoma mansoni / Q000502:physiology*; D013997:Time Factors