Case of megaloblastic anemia caused by intestinal taeniasis
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- Vuylsteke, P., Bertrand, C., Verhoef, G.E.G. et al. Ann Hematol (2004) 83: 487. doi:10.1007/s00277-003-0839-2
A 61-year-old eutrophic male was diagnosed with vitamin B12 deficiency and megaloblastic anemia. A modified Schilling test suggested intestinal malabsorption unrelated to intrinsic factor deficiency. Subsequent colonoscopy revealed the presence of a Taenia tapeworm. The anemia resolved within days under therapy with niclosamide and temporary vitamin B12 supplements. The present case suggests that, in addition to other well-known parasitic agents, e.g., Diphyllobothrium latum and Giardia lamblia, Taenia infestation can also be a cause of intestinal vitamin B12 malabsorption.