Case of the Week 686

This week ' s case was generously donated by Dr. Mike Mitchell and Laura Derderian. The following structure was seen in a stool concentrated wet mount specimen. It measures 27.5 micrometers in length. This was the only structure present in this specimen. Identification? What additional testing might also be useful in this case?
Source: Creepy Dreadful Wonderful Parasites - Category: Parasitology Source Type: blogs