title: The effect of photoperiod inversion upon Schistosoma mansoni cercarial emergence from Biomphalaria glabrata.
mesh_terms: D000818:Animals; D001700:Biomphalaria; D002940:Circadian Rhythm; D004463:Ecology; D008027:Light; D012550:Schistosoma mansoni / Q000254:growth & development*; D013696:Temperature