<prompt> Ascariasis causes:AppendicitisIntestinal obstructionBile duct obstructionAll of the above  <response>: Ans. dRef: Parasitology-Protozoology and Helminthology by K.D. Chatterjee, 13th editionThe worm inhabits the upper part of the small intestine. Pathogenic effect are:Spoliative action: robbing the host of its nutrition.Toxic action: may give rise to typhoid like fever, responsible for allergic reactions urticarial, oedema of the face, conjunctivitis and irritation of the upper respiratory tract.Mechanical effects-can cause intussusception, can penetrate through the ulcers of the alimentary canal, intestinal obstruction.Ectopic Ascariasis. 