1. When performing a direct fecal smear to look for "swimmers" or parasitic
trophozoites, the feces cannot be older than which of the following?
12 hours
5 minutes
1 hour
24 hours if not refrigerated
Answer: 1 Hour
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1. When performing a direct fecal smear to look for "swimmers" or parasitic
trophozoites, the feces cannot be older than which of the following?
12 hours
5 minutes
1 hour
24 hours if not refrigerated
Answer: 1 Hour
Explanation
Fresh feces are needed for a direct smear. The smear should be made and read
within 1 hour of fecal collection for most accurate results. Also, serial samples are
ideal. Sometimes 4 to 5 smears are needed to find an organism. A negative direct
smear does not rule out a parasite.
2. Which of these are used in the minor cross-match for blood products whenlooking
for a compatible blood donor for a dog?
Donor red blood cells, donor plasma
Recipient red blood cells, donor plasma
Recipient red blood cells, recipient plasma
Donor red blood cells, recipient plasma
Answer: Recipient red blood cells, donor plasma
Explanation
The correct answer is recipient red blood cells, donor plasma. In a minor crossmatch,
you are looking to see if the factors in the plasma of the donor are going to react to
the recipient's red blood cells.
3. Which of the following is not a typical constituent of a urine sedimentsample?
Mast cells
Red blood cells
Squamous cells
White blood cells
Answer: Mast cells
Explanation
Mast cells would not be expected in a urine sediment sample.
Squamous cells, transitional cells, and renal cells may be found in urine sediment.
Squamous cells will likely be the largest cell visualized in a urine sample. They are
usually derived from the vagina, vulva, or urethra.
Red blood cells are a normal finding when in small numbers. Excessive red blood
cells may be a sign of disease.
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