1. Intro Flashcards Preview

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Flashcards in 1. Intro Deck (15):
1

Ideal weight of the stool specimen

5 g

2

Liquid/near-liquid stool specimens should be examined within _________ to ______________ (reason)

30 minutes of collection; to preserve motile trophozoites

3

Soft specimens must be examined within ___________

60 minutes of collection

4

Formed specimens must be processed within ___________

24 hours (may be refrigerated)

5

2 preparations of preservatives used in Parasitology

- Two-vial system: formalin/polyvinyl alcohol (PVA)
- One-vial system: sodium acetate formalin (SAF)

6

Ideal ration of fixative to stool

3 parts fixative, 1 part stool

7

Preservative with mercury

PVA

8

Mercury-free fixative

SAF

9

Fixative for concentration methods and iodine-stained mounts

5-10% formalin

10

Fixative for concentration methods, trichome and other permanent stains

PVA

11

Fixative for concentration methods and permanent stains

SAF

12

What are concentration the methods?

Sedimentation: formalin-ethyl acetate
Flotation: zinc sulfate (sp. gr. 1.18-1.20)

13

Stain for intestinal protozoa

Iron hematoxylin

14

Stain for coccidian protozoa

Modified acid-fast

15

Describe the routine stool sample collection

3 specimens collected every other day within 10 days