The epiglottis acts as a
voice box.
filter for microorganisms and debris.
cover over the larynx.
producer of mucus.
ANSWER:
(Level 1, Objective 1)
Collectively, the nose, oral cavity, pharynx, epiglottis, and larynx make up the
nasopharynx.
oropharynx.
laryngopharynx.
upper respiratory system.
ANSWER:
(Level 1, Objective 1)
The cilia present on cells of the lower respiratory system function by:
trapping microorganisms and foreign debris.
propelling microorganisms and particles out.
preventing colonization by potential pathogens.
all of the above.
ANSWER:
(Level 1, Objective 2)
The most common causative agent of a swollen and painful oropharynx is
Streptococcus pyogenes.
Arcanobacterium haemolyticum.
Corynebacterium diphtheriae.
Rhinovirus.
ANSWER:
(Level 1, Objective 3)
Infections associated with cystic fibrosis are due to inflammation of the:
bronchi.
bronchioles.
lungs.
alveoli.
ANSWER:
(Level 1, Objective 3)
A physician sends a nasal washing for viral culture. This specimen is
unacceptable because it is contaminated with upper respiratory flora.
acceptable as long as it contains epithelial cells.
unacceptable if it is for the detection of influenza or respiratory syncytial viruses.
acceptable if it has a thick consistency and is yellow or green in color.
ANSWER:
(Level 2, Objective 4)
A patient is unable to produce adequate sputum for routine, acid-fast, and fungal cultures. The physician may attempt to obtain a/an
induced sputum.
transtracheal aspirate.
bronchoalveolar lavage.
pleural fluid.
ANSWER:
(Level 1, Objective 4)
9. Two throat swabs are received from a 6-year-old female with orders for a rapid screen for group A Streptococcus. One swab is tested using the group A Streptococcus rapid screen, and it is negative. The second swab is used to inoculate
a. sheep blood agar.
b. chocolate agar.
c. no culture is necessary.
d. a and b.
ANSWER:
(Level 1, Objective 6)
Which of the following disease states requires the addition of selective and/or differential medium to ensure recovery of potential pathogens from the respiratory system?
Pertussis
Cystic fibrosis
Laryngitis
a and b
all of the above
ANSWER:
(Level 2, Objective 6)
11. A throat culture provides the following results:
Moderate growth of alpha-hemolytic, catalase-negative, optochin-susceptible, gram-positive diplococci
Heavy growth of alpha-hemolytic, catalase-negative, optochin-resistant, gram-positive cocci
Heavy growth of gamma-hemolytic, oxidase-positive, glucose- and maltoseĂ‚Â-positive, gramĂ‚Â diplococci
You would report
moderate growth of Streptococcus pneumoniae and heavy growth of normal upper respiratory flora.
heavy growth of Streptococcus pneumoniae and heavy growth of normal upper respiratory flora.
heavy growth of Neisseria meningitidis and heavy growth of normal upper respiratory flora.
heavy growth of normal upper respiratory flora.
ANSWER:
(Level 3, Objective 7)
Yeast colonies in a sputum culture are considered significant when they
are present.
comprise 25% of the organisms present.
comprise 50% of the organisms present.
comprise 75% of the organisms present.
ANSWER:
(Level 1, Objective 7)
13. An 8-year-old male presents with a red and sore throat. The rapid group A Streptococcus screen is negative, and a sheep blood agar is inoculated. At 24 hours, there are no beta-hemolytic colonies present and moderate growth of normal upper respiratory flora. At 48 hours, the same culture results are present. Which of the following statements does not explain these results?
a. His sore throat is due to Haemophilus influenzae, and it will not grow on blood agar.
b. The culture was taken very early in the infection.
c. The patient received treatment prior to specimen collection.
d. The causative agent is not bacterial.
ANSWER:
(Level 2, Objective 8)
17. A quantitative bronchial alveolar lavage culture requires:
1. sheep blood agar.
2. chocolate agar.
3. 0.01 mL pipette.
4. 0.001 mL pipette.
a. 1 and 3
b. 1, 3, and 4
c. 2, 3, and 4
d. 2 and 4
ANSWER:
(Level 1, Objective 9)
18. A bronchial washing is plated to a BCYE. This agar should be examined under a laminar flow hood due to the potential for recovery of Legionella pneumophila and
a. Bordetella pertussis.
Francisella tularensis.
mould.
Pneumocystis jiroveci.
ANSWER:
(Level 2, Objective 9)
20. A physician submits a sputum with a culture request for Legionella. Select the growth medium that should be used to cultivate this organism.
a. 7H10
b. TCBS
c. BCSA
d. BCYE
ANSWER:
(Level 1, Objective 6)
