title: Ammonia excretion by planorbid snails--a possible mechanism for host selection by schistosome miracidia.
mesh_terms: D000641:Ammonia / Q000378:metabolism*; D000818:Animals; D001700:Biomphalaria / Q000378:metabolism*; D002033:Bulinus / Q000378:metabolism*; D012550:Schistosoma mansoni / Q000502:physiology; D013045:Species Specificity
chemical_list: D000641:Ammonia