Parasitology- Exam review- Exam I Questions with 100% correct answers 2024
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Parasitology -
Institution
Parasitology -
If a parasite has a sexual stage, the host in which that stage occurs is known as the
Definitive host
If an infected host is described as a "dead end" host, it means
The parasite cannot complete its life cycle in that host
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Parasitology- Exam review-
Exam I Questions with 100%
correct answers 2024
If a parasite has a sexual stage, the host in which that stage occurs
is known as the - answer Definitive host
If an infected host is described as a "dead end" host, it means -
answer The parasite cannot complete its life cycle in that host
The value of using polyvinyl alcohol (PVA) as a stool fixative is that -
answer Smears for a "permanent stain", eg trichrome, can be made
from it
In the formalin-ethyl acetate procedure concentration procedure,
parasitic structures are expected to be present in which of the four
layers after centrifugation - answer Sediment
In the parts of the US with temperate climate, the most frequently
encountered enteric parasites are... - answer Cryptosporidium and
Giardia
In a hospital setting, a specimen of unformed feces is brought to the
lab. immediately after collection; you know that it cannot be
examined immediately, so you would... - answer Mix a sample of it
into 10% formalin and a sample into polyvinyl alcohol (PVA)
An outpatient comes to the laboratory with a physician's orders for
"O & P x3" No instructions have been given to the patient other than
to get collection kits from the lab. You give the patient collection
kits and advise the patient to... - answer Collect 3 specimens 2 days
apart, say Monday, Wednesday, and Friday
, With the increasing use of immunoassays in parasitology, of concern
is/are - answer The compatibility of the fixative(s) used to preserve
the fecal specimen
The possibility of "missing" (not detecting) parasites other than
those detected by the immunoassay
"Non-traditional" parasitology stain(s) that now have an important
role in parasitology microscopy include - answer Calcofluor white
stain; Modified (reduced decolorization) acid-fast stain; and Acridine
orange stain
What type of infections may be caused by all 3 of the genera of free-
living amebae, Naegleria, Acanthamoeba, and Balamuthia - answer
Central nervous system (CNS) infections
In which of the free-living ameba genera is there a flagellate stage -
answer Naegleria
Cysts of the free-living amebae typically have which of the following
properties - answer Resistance to drying (dessication);
Resistance to low levels of disinfection, e.g. as in potable water
supplies;
Cyst wall contains cellulose/chitin and stains well with calcofluor
white
In which of the following, previously thought not to have a cyst
stage, has a cyst stage recently been described. - answer
Dientamoeba fragilis
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