<prompt> Which of the following is not true regarding pseudomembranous colitis?Antibiotic associated diarrhea eg: 3rd gen cephalosporins .Characterised by pseudomembranes at the site of mucosa injury.Presents as watery diarrhea, abdominal pain and feverClostridium difficile is the only cause.  <response>: Though pseudomembranous colitis is clasically caused by clostridium difficile, but also caused by salmonella, clostridium perfringes and saurevs in some cases. 