Thursday, November 2, 2023

Case of the Week 729

This week's case was generously donated by Drs. Jacob Rattin, Anisha Misra, and Hannah Wang, and originally identified by Marissa Roberts. The following objects were seen on a trichrome-stained stool specimen and measure approximately 15 micrometers in length. What is your identification?


Lyne said...

Chilomastix mesnili trophozoite

Anonymous said...

The sharply pointed tail tells us its identification. A nucleus with eccentric karyosome also points out the commensal Chilomastix mesnili.
Florida Fan

Anonymous said...

Trophozoite of Chilomastix mesnili. It is considered as a non-pathogenic flagellate, but it's presence is an indication of the consumption of contaminated food and/or water.