Answer to Parasite Case of the Week 541: not a parasite; citrus juice vesicles.
This is a not-uncommon finding in stool that is helpful to recognize, since it is occasionally submitted as a potential parasite. In this case, the patient reported eating clementines regularly. So here is a dissection of a clementine for comparison:
Pretty good, huh? Of course it's not possible to recognize the type of citrus from this case alone, and a report of "not a human parasite" is usually sufficient for patient care.
Wikipedia has a
nice article on juice vesicles if you would like more information.
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