Sunday, October 27, 2013

Answer to Case 279

Answer:  Hymenolepis nana, the dwarf tapeworm

This worm is usually acquired through ingestion of an infected arthropod intermediate host, and is commonly seen in young children.  The characteristic eggs have an inner and outer membrane, with 4-8 polar filaments arising from the 2 poles of the inner membrane:

Internal hooklets are also usually seen and can be appreciated somewhat in this image.

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