Parasitology Specimen Collection Guidelines
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Questions and Answers

What is the recommended number of specimens for detecting protozoa and helminths in stool?

  • 3 specimens (correct)
  • 2 specimens
  • 4 specimens
  • 1 specimen

What is the proper fixative to use for preserving protozoan cysts?

  • Barium
  • Formalin (correct)
  • Mineral oil
  • Bismuth

Why should specimens be fixed in preservative for at least 30 minutes before processing?

  • To reduce the shelf-life of the specimen
  • To enhance the color of the specimen
  • To preserve protozoa morphology (correct)
  • To halt helminth egg development

Which substance is listed as interfering with stool specimen testing?

<p>Mineral oil (A)</p> Signup and view all the answers

When should stool samples be collected for testing?

<p>Before therapy or 5 to 7 days after therapy (C)</p> Signup and view all the answers

What are the advantages of formalin as a fixative?

<p>Easy to prepare and preserves specimens for several years (D)</p> Signup and view all the answers

Which technique is used for detecting Enterobius vermicularis eggs?

<p>Cellophane Tape Preparation (A)</p> Signup and view all the answers

What is the recommended staining method for blood smears prepared from fresh whole blood without anticoagulant?

<p>Wright’s stain (A)</p> Signup and view all the answers

What is the recommended timing for specimen collection for Cellophane Tape Preparation?

<p>Before patient washes/defecates (C)</p> Signup and view all the answers

Which parasite detection method involves using saline wet preps as the method of choice?

<p>Saline wet preps (D)</p> Signup and view all the answers

Which parasite's trophozoites can be detected using Duodenal Material?

<p>Giardia intestinalis (B)</p> Signup and view all the answers

The Knott technique involves concentrating blood with low microfilariae numbers by mixing venipuncture-collected blood with what substance?

<p>2% formalin (D)</p> Signup and view all the answers

What is the purpose of culturing Naegleria or Acanthamoeba on non-nutrient agar seeded with Escherichia coli?

<p>Detecting Naegleria fowleri or Acanthamoeba (B)</p> Signup and view all the answers

Which specimen is primarily used for examining Acanthamoeba?

<p>Eye specimens (B)</p> Signup and view all the answers

Which specimen type is helpful for detecting Entamoeba histolytica in the colon?

<p>Cultures (C)</p> Signup and view all the answers

What is the main purpose of using Buffy coat slides stained with Giemsa?

<p>To detect Leishmania &amp; Trypanosoma (A)</p> Signup and view all the answers

What can be recovered from Novy-MacNeal-Nicolle (NNN) medium?

<p>Coccidian parasites and microsporidia (D)</p> Signup and view all the answers

Which technique uses thick slides Giemsa-stained from resulting sediment?

<p>Knott technique (C)</p> Signup and view all the answers

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