In people with a properly functioning immune system, infection may resolve without medication. A small portion, however, develop a chronic infection. People with an impaired immune system are at higher risk of chronic infection. Medication is an effective cure for nearly all people although there is growing drug-resistance. Children with chronic<unk>  are at risk for failure to thrive as well as more long-lasting sequelae such as growth stunting. Up to half of infected people develop a temporary lactose intolerance leading symptoms that may mimic a chronic infection. Some people experience post-infectious irritable bowel syndrome after the infection has cleared.<unk>  has also been implicated in the development of food allergies. This is thought to be due to its effect on intestinal permeability.
Giardiasis
Irritable bowel syndrome
Cryptosporidiosis
Cyclosporiasis
Eosinophilic gastroenteritis
Dientamoebiasis
Opisthorchiasis
Amoebiasis