This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Helminthology, Subject name: Microbiology
Malabsorption caused by A/E - 
Select and explain. 
A. Giardia, B. Ascaris lumbricoides, C. Strongyloides, D. Capillaria philipensis
B: Ascaris lumbricoides
Answer: B: Ascaris lumbricoides 
Explanation: Ans. is 'b' i.e., Ascaris lumbricoides Capillaria philippinensisThe parasite is small: Males measures 2.3 mm to 3.2 mm and females measure 2.5 mm to 4.3 mm long. The male has small caudal alae and a spineless spicule sheath.Pathology in Capillaria infectionWorms repeatedly penetrate mucosa of the small intestine and reenter the lumen especially jejunum leading to progressive degeneration of mucosa and submucosa. Infected people usually experience diarrhoea and abdominal pain progressing to weight loss, weakness malaise, anorexia and emaciation. Protein and electrolytes are lost and there is malabsorption of fats and sugars. Patients die from loss of electrolytes, heart failure and sometimes secondary bacterial infection.