This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Helminth implicated in causing pernicious anemia is: 
Select and explain. 
A. Diphyllobothrium latum, B. Ascaris, C. Taenia solium, D. Hymenolepis nana
A: Diphyllobothrium latum
Answer: A: Diphyllobothrium latum 
Explanation: Ans: A. Diphyllobothrium latum (Ref: Paniker's 7/e p118, b/e p142; lawetz 27/e p731; Harrison 19/e p1434.Helminth implicated in causing pernicious anemia is Diphyllobothrium latum.Diphyllobothrium latum:Disease caused by tapeworms is chiefly vague abdominal discomfo and loss of appetite, leading to weight loss.D latum has an unusual capacity to absorb vitamin B12 a causing vitamin B12 deficiency a Pernicious anemia may rarely develop.