Parasitology Assignment

AKA New World Hookworm

Necator americanus

AKA Old World Hookworm

Ancylostoma duodenale

AKA Oriental Lung Fluke

Paragonimus westermani

AKA Fish Tapeworm

Diphyllobothrium latum

AKA Whipworm

Trichuris trichiura

AKA Dwarf Tapeworm

Hymenolepis nana

AKA Liver Fluke

Fasciola hepatica

AKA Beef Tapeworm

Taenia saginata

AKA Rat Tapeworm

Hymenolepis diminuta

AKA Pig Tapeworm

Taenia solium

AKA Threadworm

Strongyloides stercoralis

Cause of Visceral Larva Migrans

Toxocara canis

Cause of Backpacker’s Diarrhea

Giardia lamblia (now G. duodenalis)

Cause of Granulomatous Amoebic Encephalitis (GAE) and Keratitis

Acanthamoeba

Cause of Cysticercosis

Taenia solium

Cause of Trichinosis

Trichinella spiralis

Cause of Hydatid Disease

Echinococcus granulosus

Enterobius vermicularis infection is usually diagnosed by:

Cellophane tape test

The best direct diagnosis of Echinococcus granulosis infection in man is made by identification of:

Hydatid cyst in tissues

Eggs or larvae that are recovered in the stool are routinely used to diagnose infections caused by all of the following except:

Trichinella spiralis

Which of the following specimens is the least likely to recover Trichomonas vaginalis?

Feces

A free-living amoeba that causes primary amoebic meningoencephalitis, this organism gains entrance into the CNS through the nasal mucosa, usually by swimming in contaminated water.

Naegleria fowleri

An AIDS patient was admitted to the hospital with the diagnosis of enterocolitis. A biopsy of the small bowel mucosa showed spherical, acid-fast oocysts measuring 4-5 um in diameter under the brush border of the intestinal mucosal epithelial cells.  This parasite most likely is:

Cryptosporidium

Which of the following parasites most frequently localizes in the central nervous system of AIDS patients?

Toxoplasma gondii

Which of the following organisms is a nonpathogenic form of E. histolytica?

Entamoeba dispar

Which of the following does not have a cyst stage?

Dientamoeba fragilis

The examination of sputum may be necessary to diagnose infections with:

Paragonimus westermani

A nonoperculated egg with a terminal spine seen in urine or feces indicates infection with:

Schistosoma hematobium

Two helminth eggs that may resemble one another are:

Diphyllobothrium latum and Paragonimus westermani

Eating undercooked pork can lead to an infection with:

Taenia solium and Trichinella spiralis

An operculated cestode egg that can be recovered from human feces is:

Diphyllobothrium latum

Oocysts of Cryptosporidium spp. can be detected in stool specimens using:

Modified acid-fast stain

The findings of ingested red blood cells in a trophozoite identifies:

Entamoeba histolytica

Encysted, coiled larvae found in a muscle biopsy would indicate:

Trichinella spiralis

A 15-um pear-shaped flagellate with two nuclei and “falling leaf” motility in a direct saline mount of a stool specimen is most likely:

Giardia lamblia

The causative agent of Chagas disease is:

Trypanosoma cruzi

The Plasmodium sp. with banana or crescent shaped gametocytes is:

Plasmodium falciparum

Identify the organism

Trichuris trichiuria

Identify the organism

Schistosoma mansoni

Identify the organism

Giardia duodenalis (lamblia)

Identify the organism

Trichomonas hominis

Identify the organism

Taenia species

Identify the organism

Enterobius vermicularis

Identify the organism

Schistosoma haematobium

Identify the organism

Hookworm

Identify the organism

Plasmodium falciparum

Identify the organism

Babesia species

Identify the organism

Trypanosoma cruzi

Identify the organism

Strongyloides stercoralis