1. Which of the following is NOT a characteristic of the
Staphylococci?
A. Gram positive
B. occur in grape-like clusters
C. produce spores
D. may have capsules
2. Suppuration, often caused by invasive strains of
Staph aureus, is:
A. the formation of pus
B. the initiation of fever
C. the induction of hemolysins
D. the production of toxins
3. Staph saprophyticus can be differentiated
from Staph aureus and Staph epidermidis
by its:
A. lack of hemolysis
B. resistance to novobiocin
C. resistance to leucocidin
D. secretion of collagenase
4. An epidemiological procedure to identify different
strains of Staphylococci is:
A. the gram stain
B. antibiotic susceptibility
C. debridement
D. phage typing
5. Surgical debridement refers to:
A. loss of skin
B. prevention of disease
C. removal of dead tissue
D. surgical application of antibiotics
6. All of the following diseases are caused by
Staphylococcus aureus except:
A. boils
B. carbuncles
C. anaerobic abscesses
D. toxic shock syndrome
7. Scalded Skin Syndrome in children results due
to:
A. lipase production
B. exfoliatin production
C. food poisoning
D. infection at burn site
8. Which of the following is NOT a characteristic of the
Streptococci?
A. they are arranged in clusters
B. they are gram positive
C. they are sphere-shaped
D. they are usually susceptible to penicillin
9. Alpha hemolysis refers to:
A. the inability to lyse red blood cells
B. a clear zone surrounding a bacterial colony
C. a greenish opaque zone surrounding a bacterial colony
D. the lysis of white blood cells
10. Streptococcus pyogenes belongs to
group ___ of the Lancefield system.
A. A
B. B
C. C
D. D
11. Clinically, Streptococci can be identified
from the Staphylococci based on:
A. gram stain
B. cell shape
C. catalase test
D. hemolysis
12. The Pneumococci can be distinguished from
the alpha-hemolytic streptococci based on:
A. the optochin disk
B. catalase test
C. gram stain
D. size
13. Pneumovax and Prevnar are vaccines made
from:
A. cell membrane antigens
B. capsular antigens
C. toxins
D. pili proteins
14. Rheumatic fever occurs at a rate of 3% of the
untreated cases of strep throat. Antibodies against Strep
pyogenes react with streptococcal antigens deposited in the
joints or heart valves or cross-react with heart muscle to damage
the host tissue. According to this information, the mechanism of
Strep pyogenes pathogenicity in rheumatic fever
would be considered to be which of the following?
A. exotoxins
B. endotoxins
C. inflammatory reaction
D. cell-mediated hypersensitivity Type IV
15. An enzyme produced by virtually all strains of
Staph aureus and important in identifying it
is:
A. leukocidin
B. coagulase
C. mannose
D. streptokinase
16. The most common type of pyoderma caused by
Staph is described as:
A. scarlet fever
B. carbuncle
C. scalded skin syndrome
D. toxic shock syndrome
17. The scientist who developed a system of identifying
the variety of strains of Streptococcus pyogenes
was:
A. Crawford
B. Warfel
C. Lancefield
D. Anam