Case of the Week 615

In the spirit of the American Thanksgiving holiday, I'd like to present two related cases that were donated by two parasitologists in our wonderful parasitology community: George from Memorial Sloan Kettering and William Sears from the NIH. I'm thankful for many things, and among them are this generous and supportive group that inspires and educates me each week. In his case, George noted the following (images) in a stool concentrate.

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.

William was also kind enough to provide adults of this parasite, complete with more eggs (in utero and free). I've seen similar adult worms in concentrated stool specimens. Can anyone put this whole picture together for us?

Answer to Case 615:

Strongyloides stercoralis rhabditiform larva, eggs, and adults.

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.