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Parasitology Exam II Chapter Questions And Answers
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Parasitology Exam II Chapter Questions And Answers Oocysts found in human feces Cystoisospora belli Commonly causes relapses of malaria Plasmodium vivax Transmitted by tsetse fly T. brucei gambiense Pathogenic intestinal flagellate Giardia lambila How would you differentiate Entamoeba hystol...

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Parasitology Exam II Chapter Questions And
Answers

Oocysts found in human feces Cystoisospora belli




Commonly causes relapses of malaria Plasmodium vivax




Transmitted by tsetse fly T. brucei gambiense




Pathogenic intestinal flagellate Giardia lambila




How would you differentiate Entamoeba hystolytica from entamoeba dispar in a fecal smear?

Both are morphologically identical. E. histolytica trophozoites will have ingested RBCs.

Further confirmation using immunologic procedures.




How would you differentiate entamoeba hystolytica from Entamoeba coli on a fecal smear?

In trophozoite: Study size, consistency, and inclusions (bacterial or RBCs) in cytoplasm,

directional vs. random motility, shape of pseudopodia, or staining characteristics of nuclear

structures.

,Parasitology Exam II Chapter Questions And
Answers
In cysts: study size, number of nuclei, nuclear structure, shape of chromosomal bodies, or

vacuoles




Trophozoite Motile stage of a protozoon that feeds, multiplies, and maintains the colony

within the host




Cyst Immotile sage protected by a cyst wall formed by the parasite. The protozoon is

readily transmitted into a new host in this stage




Sporozoite Plasmodium form that develops inside a sporocyst, invades the salivary glands

of a mosquito, and is transmitted to humans




Schizogony Asexual multiplication of Apicomplexa; multple intracellular nuclear division

precedes cytoplasmic division




Carrier A host harboring and disseminating a parasite but exhibiting no clinical signs or

symptoms

, Parasitology Exam II Chapter Questions And
Answers
Oocyst Encysted form of the ookinete; occurs on the stomach wall of the Anopheles spp.

mosquitoes infected with malaria




Pseudocyst A cystlike structure formed by the host during an acute infection with

Toxoplasma gondii. The cyst is filled with tachyzoites in normal hosts; may occur in the brain or

other tissues. Latent source of infection that may become active if immunosuppression occurs




L.D. body (Leishman-Donovan body) Each of the small ovoid amastigote forms found in

tissue macrophages of the liver and spleen in patients with Leishman-Donovan infection




Paroxysm Fever-chills syndrome in malaria. Spiking fever corresponds to the release of

merozoites and toxic materials form the parazited RBC; shaking chills occur during schizont

development. Occurs in malaria clinically every 36 to 72 hours, depending on the species




Atrium An opening; in humans referring to the mouth, vagina, and urethra




Method of infection for Kala-azar Bite of phlebotomus spp.

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