Annals of Hematology

, Volume 83, Issue 7, pp 487–488 | Cite as

Case of megaloblastic anemia caused by intestinal taeniasis

  • Peter Vuylsteke
  • Celine Bertrand
  • Gregor E. G. Verhoef
  • Peter Vandenberghe
Case Report


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.


Megaloblastic anemia Taeniasis 



We thank Dr. Edmond Charlier for clinical and laboratory data and Dr. Christopher Butler for reading the manuscript.


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Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • Peter Vuylsteke
    • 1
  • Celine Bertrand
    • 1
  • Gregor E. G. Verhoef
    • 1
  • Peter Vandenberghe
    • 1
  1. 1.Hematology Unit, Department of Internal Medicine & Center of Human GeneticsUniversity Hospital LeuvenLeuvenBelgium

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