title: In vitro excystation of Sphaeridiotrema globulus metacercariae, structure of cyst, and the relationship to host specificity.
mesh_terms: D000818:Animals; D002645:Chickens; D004372:Ducks; D005750:Gastric Juice / Q000032:analysis; D005777:Geese; D006863:Hydrogen-Ion Concentration; D007419:Intestinal Secretions / Q000032:analysis; D008854:Microscopy, Electron; D010084:Oxidation-Reduction; D010434:Pepsin A / Q000494:pharmacology; D012908:Snails; D014357:Trypsin / Q000494:pharmacology
chemical_list: D014357:Trypsin; D010434:Pepsin A