This week's case is from Idzi Potters and the Institute of Tropical Medicine, Antwerp. The following object was seen in a concentrated stool specimen from a 3-year-old toddler with diarrhea (40x objective). It measures 45 micrometers in greatest dimension. 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.
Hymenolepis nana egg.