Exercise 3

Question 1

Interfering substances

Answer 1

medications and substances
Oily laxatives
Antibiotics

Question 2

medications

Answer 2

anti-diarrheal, antacids, anti-malarial agents

Question 3

substances

Answer 3

bismuth and barium

Question 4

crystalline residues

Answer 4

medications and substances

Question 5

Oily laxatives

Answer 5

castor oil, mineral oil, or suppositories

Question 6

retard the motility, distort morphology

Answer 6

Oily laxatives

Question 7

affect the normal gastrointestinal flora
usually decreases the number of protozoans
feed on intestinal bacteria

Answer 7

Antibiotics

Question 8

containers

Answer 8

clean, wide-mouth with tight-fitting lid

Question 9

fit of the lid importance

Answer 9

prevent accidental spillage
maintain moisture

Question 10

Integrity of the morphology of certain parasites are affected by

Answer 10

desiccation

Question 11

Fecal sample should be collected without contamination with:

Answer 11

a. Urine
b. Toilet water and/or soil

Question 12

may destroy protozoans especially the motile stages

Answer 12

a. Urine

Question 13

may contain free-living organisms that can be mistaken for human parasites

Answer 13

b. Toilet water and/or soil

Question 14

Volume of the fecal sample is dictated by the

Answer 14

technique

Question 15

Volume for formed stool

Answer 15

a thumb-sized

Question 16

Volume for watery specimen

Answer 16

1/2 teaspoon or 5-6 tablespoons

Question 17

minimum number of specimen for routine examination

Answer 17

3 fecal samples

Question 18

Times of Collection

Answer 18

separate days, every other day
within a 10-day period

Question 19

likely to yield a higher percentage of positive samples

Answer 19

collection on alternate days

Question 20

To ensure the recovery of parasitic organisms that are passed intermittently and in fluctuating numbers, the examination of a minimum of (?) collected over a (?) period is recommended

Answer 20

three specimens
7- to 10-day

Question 21

Number of Specimens for intestinal amoebiasis

from normal bowel movement
after catharsis/purge

Answer 21

6 specimens

3
3

Question 22

Number of Specimens for routine examination

normal bowel movement
after catharsis/purge

Answer 22

3 specimens

2
1

Question 23

Number of Specimens post-therapy examinations

Answer 23

3 specimens

Question 24

protozoan infection

Answer 24

checked 3–4 weeks after therapy

Question 25

Taenia infection

Answer 25

examined 5–6 weeks after therapy

Question 26

indicative of parasitic active infection

Answer 26

liquid stool

Question 27

small possibility of tropozoite

Answer 27

soft/semi-formed stool

Question 28

Critical Time Period for Examination for liquid stool

Answer 28

within 30 minutes of passage

Question 29

Critical Time Period for Examination for soft/semi-formed stool

Answer 29

within 1 hour of passage

Question 30

Critical Time Period for Examination for formed stool

Answer 30

at any time within 24 hours after passage

Question 31

Fecal sample container label

Answer 31

i. Patient’s name and identification number, age, sex
ii. Date and time of specimen collection – crucial in transport processing
iii. Requesting physician
iv. Presumptive diagnosis

Question 32

Requisition form

Answer 32

i. Patient’s name and identification number, age, sex
ii. Date and time of specimen collection – crucial in transport processing
iii. Requesting physician
iv. Requesting physician
v. Requested procedure
vi. Presumptive diagnosis
vii. Prior infection
viii. Travel history