Case of the Week 617

Here is our monthly case from Idzi Potters and the Institute of Tropical Medicine, Antwerp. The following were seen in stool specimens in a patient with diarrhea and recent travel to sub-Saharan Africa. What's the identification?

Read Dr. Pritt's blog, Parasite Wonders, and submit your answers, comments, and questions. Also, visit her website ParasiteWonders.com, which hosts an archive of classic images from cases Dr. Pritt posted going back to 2007 (in an easy-to-search "A through Z" format) and also offers a flashcard feature.

Unstained wet mount
Combined iron hematoxylin-Kinyoun stain

Answer to Case 617:

Cystoisospora (formerly Isospora) belli

Bobbi Pritt, M.D.

Bobbi Pritt, M.D.

Bobbi Pritt, MD, MSc, is a Professor of Laboratory Medicine and Pathology and the Director of the Clinical Parasitology Laboratory at Mayo Clinic in Rochester Minnesota. She is also the Chair of the Division of Clinical Microbiology. Her research interests are in clinical parasitology, vector-borne diseases and the pathology of infectious diseases.