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.
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.
