Most common organism responsible for pseudomembranous colitis is
Clostridium difficile: long, slender, gram-positive bacilli. Non-hemolytic, saccharolytic and weakly proteolytic. Causes: bloody diarrhea, pseudomembranous colitis, a common cause of nosocomial diarrhea. Pathogenesis: high molecular weight exotoxin A and B Toxin A is a potent enterotoxin, Toxin B is a cytotoxin. Reference: Textbook of Microbiology; Anathanarayan and paniker's; 10th edition; Page no: 270
Clostridium difficile
Clostridium botulism
Clostridium histolyticum
Clostridium butyricum
Bacteriology