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Quiz 71

Presentation of Quiz #71

A patient is diagnosed as having diarrhea and specimens are submitted to the laboratory. When examining the permanent stained smears, the following images are seen. The test result is reported as follows: “Entamoeba histolytica trophozoites present.” Based on the diagnosis of diarrhea and the laboratory findings, how would you identify the following objects seen in the permanent stained smears? Was the report correct as submitted to the physician? Why or why not?


Each Quiz has a two section format: the first section will present the Quiz topic and the second section will provide a discussion of the answer and/or various options in response to the Quiz situation presented to the user. In some situations, there may be more than one correct response.

The content within this site is made possible through the extensive contribution of Lynne S. Garcia, M.S., MT(ASCP), CLS(NCA), BLM(AAB), F(AAM), Director, Consultantation and Training Services (Diagnostic Medical Parasitology and Health Care Administration). For additional information, she can be contacted at

Reference: Garcia, L.S. 2015. Diagnostic Medical Parasitology, 6th Ed., ASM Press, Washington, D.C.