Clinical Mycology/Parasitology Exam

pollen grains

Artifacts found in a stool specimen that can be confused with ova or cysts

naegleria fowleri

primary amoebic encephalitis caused by:

improve detection of the organism

the advantage of using thick blood smears for malarial parasites

toxoplasma gondii

multifocal brain lesions in AIDS patients are commonly caused by:

entamoeba histolytica

A patient is suspected of having amoebic dysentery. Upon microscopic examination of a fresh fecal specimen for ova and parasites, the following data was obtained:

• a trophozoite of 25 micrometers

• exhibits a progressive, unidirectional crawl

• possesses evenly distributed, peripheral chromatin

• possesses a finely granular cytoplasm

The information indicates the presence of:

endolimax nana

Small protozoan cysts are found in a wet mount of sediment from ethyl-acetate concentrated material. Each cyst has four nuclei that do not have peripheral chromatin, and each nucleus has a large karyosome, which appears as a refractive dot. The oval cysts are MOST likely:

stronglyloides stercoralis

The term “internal autoinfection” is generally used in referring to infections with:

a scotch tape preparation from the perianal region

proper collection of a sample for recovery of Enterobius vermicularis includes collecting:

size of the trophozoite

primary means of distinguishing Entamoeba hisolytica from Entamoeba hartmanni by light microscopy:

Balantidium coli

the only medically significant ciliate organism:

liver

Where do Plasmodium sporozoites proliferate?

Trichuris Trichiura

Which nematode produces eggs with characteristic hyaline polar plugs at each end?

Ascaris

Which nematode has a characteristic mammillated bile stained egg?