<prompt> Protozoa associated with megaesophagus ?TrypanosomeAmebaGiardiaGnathostoma  <response>: Ans. is a i.e., Trypanosoma Megaesophagus and megacolon occur as complications of chronic chagas disease. T. cruzi causes chagas disease Chagas disease 1. Acute form - Occurs in infants and children. - Presents with fever, unilateral face swelling, lymphadenopathy, splenomegaly and chagoma Localized swelling of the skin. 2. Chronic form - Occurs in adolescent and adults - Presents with cardiac arrhythmias and neurological manifestations. - Complications -- megacolon, megaesophagus, cardiomyopathy. Romanas sign When entry of the parasite is through the conjuctiva an edematous swelling of eyelids of one eye develops. 