cytomegalovirus (cmv) infection can cause colitis which is usually manifested with fever, weight loss, anorexia and abdominal pain.watery diarrhea can be the only manifestation. cmv colitis usually can not be diagnosed according to the clinical findings. moreover, endoscopic appearance can exactly mimic pseudo-membranous colitis. here by, we are presenting a patient with fever and watery diarrh...