Image Challenge 4: Artifact

October 18, 20080 comments

The object is a pollen grain that may be mistaken for a Taenia egg; this case would be reported as no parasites found, artifact.

Diagnostic features are:

  • The object is too small to be a Taenia spp. egg; Taenia ranges from 31 to 43 micrometers.
  • The shape of the object is not as round as Taenia spp. eggs typically appear. Taenia eggs are not always spherical; however the size would still rule it out.
  • The "shell" of the granule appears thick and striated, similar to a Taenia spp. egg, however there are no hooks visible inside the object. Taenia spp. eggs have an embryonated oncosphere with six hooks inside each shell.
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