Case #307 – September, 2011

Stool specimens were collected from Haitian patients at a refugee clinic for routine ova-and-parasite (O&P) examination. The stool specimens were collected in 10% formalin and polyvinyl alcohol (PVA) and sent to the county public health laboratory for processing and examination. Figures A and B show what was observed in low numbers in a concentrated wet mount of the formalin-preserved stool from one of the patients. The objects measured on average 53 micrometers long by 22 micrometers wide. What is your diagnosis? Based on what criteria?

Images presented in the DPDx case studies are from specimens submitted for diagnosis or archiving. On rare occasions, clinical histories given may be partly fictitious.