Roses are red, violets are blue, what's lurking inside you?
A fecal sample from a 6-month old golden hamster, initially presented for rectal prolapse and surgery, was submitted to the parasitology diagnostics laboratory to evaluate the presence of parasites eggs. The fecal sample was centrifuged with Sheather’s sugar solution and the following egg was observed.
Image 1: Parasite egg measures 45 µm x 30 µm.
Hymenolepis nana, a parasite of rodents and humans. Egg size ranges from 30 to 50 µm. The inner membrane has two poles, from which 4-8 polar filaments spread out between the two membranes. The oncosphere has six hooks.
The infective larval stage called Cysticercoid, develops in fleas and flour beetles. Besides these intermediate hosts, H. nana can complete its life cycle within the intestinal tract of a rodent or human, where the eggs hatch and form a cysticercoid in the intestinal mucosa. These cysticercoids later reenter the lumen to complete their development.
The importance of this parasite is the zoonotic potential.
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