Parasitology Ch. 17
1. A fecal sample should not be allowed to be refrigerated for longer
than .: 24 hours
2. It is important for fecal samples to be fresh due to the rapid development
and changes that occur in the parasite's eggs or larae once in the environment.
True/False?: True
3. We can collect group samples in .: Pigs, cattle, sheep
4. The direct fecal smear is good for viewing motile forms of protozoans and
can be used as stand alone method for evaluating the patient for parasites.
True/False?: False
5. Readily available, does not distort roundworm eggs. Floats fewer eggs and is
1/2
, messy to work with: Sheather's solution
6. Most efficient flotation solution, can be purchased already prepared. Forms
crystals on slide and distorts eggs after a time. More expensive than sugar
solution.: Sodium Nitrate Solution
7. The least desirable flotation solution. corrodes lab equipment, severly dis-
torts eggs, forms crystals. it is inexpensive and readily availble: Saturated sodium
chloride solution
8. similar to the sugar solutions. can see cystic stages of intestinal protozoans
with this the best: zinc sulfate solution
9. forms crystals. inexpensive and readily available: magnesium sulfate solution
10. The centrifugal flotation method is uperior to the simple fecal float because
2/2
1. A fecal sample should not be allowed to be refrigerated for longer
than .: 24 hours
2. It is important for fecal samples to be fresh due to the rapid development
and changes that occur in the parasite's eggs or larae once in the environment.
True/False?: True
3. We can collect group samples in .: Pigs, cattle, sheep
4. The direct fecal smear is good for viewing motile forms of protozoans and
can be used as stand alone method for evaluating the patient for parasites.
True/False?: False
5. Readily available, does not distort roundworm eggs. Floats fewer eggs and is
1/2
, messy to work with: Sheather's solution
6. Most efficient flotation solution, can be purchased already prepared. Forms
crystals on slide and distorts eggs after a time. More expensive than sugar
solution.: Sodium Nitrate Solution
7. The least desirable flotation solution. corrodes lab equipment, severly dis-
torts eggs, forms crystals. it is inexpensive and readily availble: Saturated sodium
chloride solution
8. similar to the sugar solutions. can see cystic stages of intestinal protozoans
with this the best: zinc sulfate solution
9. forms crystals. inexpensive and readily available: magnesium sulfate solution
10. The centrifugal flotation method is uperior to the simple fecal float because
2/2
