<prompt> Oral vancomycin can be used for treatment of ?Hepatic encephalopathyPseudomembranous colitisStaphylococcal food poisoningNone of the above  <response>: Ans. is b i.e., Pseudomembranous colitis o Vancomycin is used orally to treat pseudomembranous colitis by clostridium difficile because it is not absorbed from the gastrointestinal tract and higher concentration reaches the colon. 