title: Serum pepsinogen activity and the diagnosis of bovine ostertagiasis.
mesh_terms: D000367:Age Factors; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis*; D004792:Enzyme Precursors / Q000097:blood*; D005243:Feces / Q000382:microbiology; D010434:Pepsin A / Q000097:blood*; D012621:Seasons; D014252:Trichostrongyloidiasis / Q000662:veterinary*
chemical_list: D004792:Enzyme Precursors; D010434:Pepsin A