PathWays Case Study: August 4

Unstained wet preparation; object measures approximately 100 micrometers in length.

Unstained wet preparation; object measures approximately 100 micrometers in length.

The above were found in a stool parasite exam from a 50-year-old pig farmer with abdominal pain, weight loss, and bloody diarrhea.  The images represent unstained wet preparation and trichrome staining.

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Dr. Bobbi Pritt

Bobbi Pritt, M.D.
Vice Chair of Education, Department of Laboratory Medicine
Consultant, Division of Clinical Microbiology
Mayo Clinic
Associate Professor of Laboratory Medicine and Pathology,
Mayo Clinic College of Medicine


April Josselyn

April Josselyn is a Marketing Associate at Mayo Medical Laboratories. She is the editor of Mayo Clinic PathWays and supports corporate communications strategies and internal communications. She has worked at Mayo Clinic since 2012. Outside of work, April enjoys the outdoors and being "hockey mom" for her two sports-crazed boys.


Nice case !

I love mayo clinic laboratory.
Am a laboratory medical student, a graduate.
Wat i wish is one day to be part of this community.

Thanks Dr. Pritt! A nice case… You must have taught us really well:-)

Thank you Dr. Pritt. The explanations following the answer is a nice bonus….coming from the AP side.

Haemorgeic diarrhea, weight loss,abdominal pain are consistent with blastocyst is homonis

good case, thanks for sharing.

the big cell, cilia and big nucleus are the give away clue

the big nucleus and cilia are the give away clue

Thank you for sharing, Dr.Pritt!

Hello! I like how you explained the other potential answers. This really keeps a clear understanding of the correct response, and navigates to the proper identification of the others. Thank you

The difference is the size only?

Although retired, I continue to learn. Parasitology has always been a favorite of mine!

Interesting case!

Thank you for sharing.

Interesting case

The photo of the others may help us to remember. But is very interesting, thanks.

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