Exam 4: Protozoa: Amoeba

Name the parasite shown in the following image:

Entamoeba histolytica can be differentiated from E. hartmanni based on differences in the:

A cyst measuring 25 µm in diameter was observed in a fecal smear. It contained a large, clear central vacuole with four homogeneous nuclei lying outside the vacuole near the cyst wall. This parasitic form suggests the presence of:

The free-living amoeba associated with meningitis is:

The parasite most often associated with contaminated contact lens cleaning solution is:

The most prominent morphologic feature used to identify Iodamoeba bütschlii is:

An Entamoeba histolytica trophozoite may be identified by which of the following morphologic features?

Name the parasite shown in the following image:

A 10-year-old boy with symptoms of meningitis and a history of swimming in his farm pond was brought to the hospital emergency department. Examination of his CSF revealed motile amoeba measuring 12 µm in diameter. The most likely parasite is:

A permanently stained fecal smear revealed several cysts containing eight nucleoli that had clumped chromatin and eccentrically located karyosomes. The likely identity of this parasite is:

Drainage from an oral gum lesion revealed the presence of a possible amoeba. An amoeba with a single nucleus and ingested WBCs was noted in a trichrome-stained preparation of the drainage material. Which of the following is the probable parasite found in this sample?

Entamoeba histolytica can be differentiated from E. dispar based on differences in the: