title: Testing negative for Helicobacter pylori after methylene blue spraying of gastric mucosa.
authors.forename: H M
authors.initials: HM
authors.lastname: Hack
authors.forename: J
authors.initials: J
authors.lastname: Parsonnet
authors.forename: G
authors.initials: G
authors.lastname: Triadafilopoulos
mesh_terms: D000111:Acetylcysteine; D001706:Biopsy; D005188:False Negative Reactions; D005753:Gastric Mucosa / Q000382:microbiology* / Q000473:pathology; D016481:Helicobacter Infections / Q000175:diagnosis* / Q000473:pathology; D016480:Helicobacter pylori / Q000187:drug effects* / Q000302:isolation & purification*; D006801:Humans; D008751:Methylene Blue / Q000494:pharmacology*; D014510:Urease
chemical_list: D014510:Urease; D008751:Methylene Blue; D000111:Acetylcysteine