<prompt> Which of the following leads to colonic ulcers?H. PyloriCampylobacter jejuniB. ColiE. Histolytica  <response>: E. Histolytica - Acquired faeco-oral route - Exists as trophozoite and cyst forms - Development of Flasked shaped ulcer in the colon - RX :-For Asymptomatic carriers :- IodoquinolParomomycin can be used For Acute colitis:- MetronidazoleTinidazole can be used 