Adults also have ascariasis. Ascariasis is caused by infection of the body with roundworms and can be contracted at any age, so adults can also have ascariasis. 1. Ascariasis is a multi-system disease caused by consuming food infected with roundworms or their eggs, such as roundworm pancreatitis, roundworm intestinal obstruction, and roundworm encephalopathy. Common symptoms of ascariasis include cough, loss of appetite, nausea and vomiting, itching of the skin, etc. The symptoms vary according to the specific parasitic site. Some patients may have no obvious symptoms in the early stage. 2. The diagnosis of ascariasis mainly relies on stool routine, abdominal ultrasound, abdominal plain film and other examinations. If you have eaten unclean or undercooked food, it is recommended to consult a doctor to rule out the possibility of roundworm infection.