Specimen Collection and Processing

Question 1

All purpose fixative

Answer 1

Formalin

Question 2

Concentration of formalin for protozoan cysts

Answer 2

5%

Question 3

Concentration of formalin for Helmont eggs and larvae

Answer 3

10%

Question 4

Schaudinn’s solution contains:

Answer 4

Mercuric chloride

Question 5

Fixative that preserves fresh stool in preparation for staining stool smears

Answer 5

Schaudinn’s solution

Question 6

True / False:

Lugol’s iodine component should always be fresh because it is unstable

Answer 6

True

Question 7

Fixative to stool ratio

Answer 7

3:1

Question 8

Ova and parasite samples are collected 3 samples within how many days ?

Answer 8

10 days

Question 9

Acceptable sample for diagnosing amebiasis

Answer 9

6 samples in 14 days

Question 10

Patients undergoing barium, bismuth or mineral oil therapy must submit specimen how many days after completion of therapy?

Answer 10

5-7 days

Question 11

Acceptable amount of stool

Answer 11

2-5 g (walnut size) solid, or 5-6 tbsp if liquid

Question 12

Liquid stools must be examined within

Answer 12

30 min

Question 13

Semi-formed stools should be examined within

Answer 13

1 hr

Question 14

Formed stool can be held for _ hrs if refrigerated

Answer 14

24 hrs

Question 15

Specimen must be fixed in the preservative for at least how many minutes?

Answer 15

30 min.

Question 16

Stain for microsporidia

Answer 16

Modified Trichome Stain

Question 17

Stain for coccidians

Answer 17

Modified Acid Fast stain

Question 18

Most frequent parasite seen in urine

Answer 18

T. Vaginalis

Question 19

Specimen collected for the detection of S. Haematobium

Answer 19

Urine

Question 20

Specimen of choice for t. Spiralis

Answer 20

Muscle biopsy

Question 21

Specimen for Paragonimus, and Ascaris, Strongyloides and Hookworms

Answer 21

Sputum

Question 22

Skin snips can be obtained from

Answer 22

Onchocerca volvulus and Mansonella