1. Infection with the cestode Diphyllobothrium latum; human infection is caused by ingestion of raw or inadequately cooked fish infected with the plerocercoid larva. Leukocytosis and eosinophilia may occur; if the worm is located high enough in the alimentary canal, it may preempt the supply of vitamin B12 or alter its absorption, leading to hyperchromic macrocytic anemia resembling pernicious anemia, although the condition is rare, even in hyperendemic areas.
Stedman’s Medical Dictionary © Wolters Kluwer Health. All rights reserved.