Morbidity related to acute infection is in the first 1-2 weeks of the disease, with symptomatology predominated by diarrhea. Chronic infection occurs after 1-2 months of illness and is manifested by abdominal pain. The most common age at which infection has been reported in children is 5-10 years. In acute infection, duration of symptoms is 1-2 weeks. Diarrhea predominates in acute infection.
Stools are greenish brown, and their consistency varies from watery to sticky.
Occasionally, mucus is noted in the stools, but hematochezia is unusual. In chronic infection, duration of symptoms is greater than 1-2 months. Abdominal pain is the more common complaint. In children, pain is variable with regards to location, duration, and character. No specific findings are present on physical examination.