Which of the following is true concerning facultative anaerobes?
a. They have limited oxygen tolerance.
b. They require complex nutrients to exist.
c. They cannot live in oxygen environments.
d. They require simple inorganic nutrients to exist.
Q. 2 Ventilator-associated pneumonia is commonly caused by which of the following?
a. Escherichia coli c. Enterobacteriaceae
b. Bacillus anthracis d. Corynebacterium diphtheriae
Q. 3 Which of the following is a gram-negative pathogen?
a. Bacillus anthracis c. Pseudomonas aeru-ginosa
b. Staphylococcus au-reus d. Clostridium botuli-num
Q. 4 The Ziehl-Neelsen stain is useful in identifying which family of microorganisms?
a. Streptococci c. Staphylococci
b. Mycobacterium d. Pseudomonas
Q. 5 A sputum specimen is received in the microbiology laboratory. Gram staining and a microscopic examination reveal a paired, spherical, purple-stained organism. It can be reasonably assumed that this organism is which of the following?
a. Gram-negative ba-cilli c. Gram-positive dip-lococci
b. Gram-negative staphylococci d. Gram-positive ba-cilli
Q. 6 Which of the following is spread by direct contact?
a. Measles c. Staphylococcus
b. Hepatitis B d. Histoplasmosis
Q. 7 The word vibrio refers to:
a. The many shapes bacteria can assume
b. The erratic movement of bacteria
c. Comma-shaped morphology
d. Spirochete helical shape
Q. 8 An organism that appears reddish-pink after Gram staining is usually called:
a. gram-negative. c. nonacid-fast.
b. gram-positive. d. acid-fast.
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