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Parasite Case of the Week 10

Welcome back to the Parasite Case of the Week!  I post a new case every Monday, along with the answer to the previous week’s case.  Here is our new case for this week.

The following worm was an incidental finding during routine screening colonoscopy in a patient from the Philippines. It measures approximately 4 cm in length, and was mounted on a slide for better visualization of its internal structures.

Identification?
BONUS: Which end is anterior and which is posterior?

It looks like a whipworm. If so, then the whip is the anterior end, which seems backwards to me because I always thought of it as a tail. 4 cm is the perfect size for these. The cdc website (http://www.dpd.cdc.gov/dpdx/HTML/Trichuriasis.htm) has an in situ picture of one found during colonoscopy.