<prompt> Most common organism causing appendicitis is?BacteroidsE. coliStaphylococcusStreptococcus  <response>: Bacteroids are the common organism causing appendicitis. While appendicitis is clearly associated with bacterial proliferation within the appendix, no single organism is responsible. A mixed growth of aerobic and anaerobic organisms is usual. Ref: Bailey Love;s Sho Practice of Surgery,E25,Page-1206 