<prompt> Vancomycin is used orally for treatment ofHepatic encephalopathyPseudomembranous colitisStaphylococcal food poisoningNone of the above  <response>: Ref: Sharma Sharma 3rd ed. P 742-43; Katzung, 14th ed. pg. 809 Vancomycin oral is now considered as the drug of choice for pseudomembraneous colitis. Metronidazole also used for pseudomembraneous colitis in mild cases. Ampicillin has been associated with pseudomembranous colitis Ceftriaxone is DOC for typhoidenteric fever. Should be given IV. METRONIDAZOLE is also the drug of choice in the treatment of amebiasis, trichomoniasis, Giardiasis and extraluminal amebiasis. For serious pseudomembranous colitis not responding to metronidazole, DOC is Vancomycin 