MMSC 428 COMPLETE FINAL EXAM WITH
VERIFIED SOLUTIONS | UPDATED!!
Why are concentration methods used on stool
specimens?
To increase detection of ova, cysts, and larvae
present in low numbers.
What does a direct saline wet mount detect?
Motile trophozoites and larvae.
Define commensalism in parasitology.
One organism benefits while the host is neither
helped nor harmed.
Define mutualism in parasitology.
Both organisms benefit.
Define parasitism.
One organism benefits at the expense of the
host.
,What is an obligate parasite?
A parasite that must live in or on a host to
complete its life cycle.
What is a facultative parasite?
Normally free-living but can become parasitic.
What is an endoparasite?
A parasite living inside the host.
What is an ectoparasite?
A parasite living on the host surface.
What is a definitive host?
Host where the parasite reproduces sexually or
reaches sexual maturity.
What is an intermediate host?
Host containing larval or asexual stages.
,What blood cell type is commonly increased in
helminth infections?
Eosinophils.
Why are permanent stained smears used in
parasitology?
To visualize protozoan morphology for
identification.
What is the trophozoite stage?
Active feeding/motile stage.
What is the cyst stage?
Environmentally resistant infective stage.
Which Entamoeba species is pathogenic?
Entamoeba histolytica.
, Which finding strongly supports Entamoeba
histolytica?
Trophozoites containing ingested RBCs.
How is Entamoeba histolytica transmitted?
Fecal-oral ingestion of cysts.
What extraintestinal disease can Entamoeba
histolytica cause?
Liver abscess.
Which Entamoeba species commonly has up to
8 nuclei in cysts?
Entamoeba coli.
Which intestinal amoeba is morphologically
similar to E. histolytica but nonpathogenic?
Entamoeba dispar.
Which intestinal amoeba is similar to E.
histolytica but smaller?
VERIFIED SOLUTIONS | UPDATED!!
Why are concentration methods used on stool
specimens?
To increase detection of ova, cysts, and larvae
present in low numbers.
What does a direct saline wet mount detect?
Motile trophozoites and larvae.
Define commensalism in parasitology.
One organism benefits while the host is neither
helped nor harmed.
Define mutualism in parasitology.
Both organisms benefit.
Define parasitism.
One organism benefits at the expense of the
host.
,What is an obligate parasite?
A parasite that must live in or on a host to
complete its life cycle.
What is a facultative parasite?
Normally free-living but can become parasitic.
What is an endoparasite?
A parasite living inside the host.
What is an ectoparasite?
A parasite living on the host surface.
What is a definitive host?
Host where the parasite reproduces sexually or
reaches sexual maturity.
What is an intermediate host?
Host containing larval or asexual stages.
,What blood cell type is commonly increased in
helminth infections?
Eosinophils.
Why are permanent stained smears used in
parasitology?
To visualize protozoan morphology for
identification.
What is the trophozoite stage?
Active feeding/motile stage.
What is the cyst stage?
Environmentally resistant infective stage.
Which Entamoeba species is pathogenic?
Entamoeba histolytica.
, Which finding strongly supports Entamoeba
histolytica?
Trophozoites containing ingested RBCs.
How is Entamoeba histolytica transmitted?
Fecal-oral ingestion of cysts.
What extraintestinal disease can Entamoeba
histolytica cause?
Liver abscess.
Which Entamoeba species commonly has up to
8 nuclei in cysts?
Entamoeba coli.
Which intestinal amoeba is morphologically
similar to E. histolytica but nonpathogenic?
Entamoeba dispar.
Which intestinal amoeba is similar to E.
histolytica but smaller?
