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Questions and Answers
What is the advantage of using ethyl acetate in the centrifugation technique described?
What is the advantage of using ethyl acetate in the centrifugation technique described?
- Skims parasites from the top of the tube
- Concentrates oocyst of Cryptosporidium
- Improves the recovery of most parasites (correct)
- Reduces fecal debris in the preparation
Why is zinc sulfate centrifugal flotation technique preferred over other methods?
Why is zinc sulfate centrifugal flotation technique preferred over other methods?
- Removes more fecal debris from the preparation (correct)
- Is recommended for G.lamblia cyst & H.nana ova
- Skims parasites from the top of the tube
- Allows direct mixing with stool without centrifugation
What is a disadvantage of using zinc sulfate centrifugal flotation technique?
What is a disadvantage of using zinc sulfate centrifugal flotation technique?
- Floats Isospora oocysts effectively
- May miss some helminth eggs that are very dense (correct)
- Leads to shrunken Hookworm eggs
- Does not require centrifugation step
Why is Sheather's flotation method recommended for certain parasite types?
Why is Sheather's flotation method recommended for certain parasite types?
Which type of eggs are not suited for Brine's flotation method?
Which type of eggs are not suited for Brine's flotation method?
Why might some helminth eggs be missed using the zinc sulfate centrifugal flotation method?
Why might some helminth eggs be missed using the zinc sulfate centrifugal flotation method?
What is the purpose of concentrating feces?
What is the purpose of concentrating feces?
What should be done before proceeding to fecal concentration?
What should be done before proceeding to fecal concentration?
What is a key difference between concentrated preparations and direct microscopy?
What is a key difference between concentrated preparations and direct microscopy?
Why do parasites settle at the bottom of the tube in the sedimentation method?
Why do parasites settle at the bottom of the tube in the sedimentation method?
Which concentration technique is the method of choice if the specimen is from an animal source?
Which concentration technique is the method of choice if the specimen is from an animal source?
Why is HCl used in the acid ether concentration technique?
Why is HCl used in the acid ether concentration technique?
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