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1

The Rickettsial disease that killed Howard Ricketts and Stanislaus Prowazek was


A. louse-borne typhus.

B. tick-borne typhus.

C. yellow fever.

D. bubonic plague.

A. louse-borne typhus.

2

Which of the following is considered an important function of the skin?


A. hold muscle to bone

B. manufacture blood cells

C. produce antibodies

D. control body temperature

D. control body temperature

3

Which of the following is considered a function of the skin?


A. regulation of body temperature

B. prevention of fluid loss

C. synthesis of vitamin D

D. produces cytokines

E. All of the choices are correct.

E. All of the choices are correct.

4

The surface layer of the skin is the


A. cutaneous.

B. keratin.

C. dermis.

D. epidermis.

D. epidermis.

5

The oily secretion that lubricates the hair follicles of the skin is


A. sebum.

B. eczema.

C. suder.

D. acne.

A. sebum.

6

The secretions of the sweat and sebaceous glands provide ________ to the microbiota.


A. water

B. amino acids

C. lipids

D. All of the choices are correct.

D. All of the choices are correct.

7

The antimicrobial aspect(s) of the skin is/are


A. dryness.

B. saltiness.

C. acidity.

D. toxicity.

E. All of the choices are correct.

E. All of the choices are correct.

8

Which of the following organisms is not normally found on the skin?


A. staphylococci

B. diptheroids

C. Candida spp.

D. Malassezia spp.

C. Candida spp.

9

Diphtheroids


A. are part of the normal flora of the skin.

B. are responsible for body odor.

C. include P. acnes.

D. include Malassezia spp.

E. are part of the normal flora of the skin, are responsible for body odor AND include P. acnes.

E. are part of the normal flora of the skin, are responsible for body odor AND include P. acnes.

10

Which of the following normal skin flora is a small yeast?


A. staphylococci

B. diphtheroids

C. Candida spp.

D. Malassezia spp.

D. Malassezia spp.

11

The growth of P. acnes within hair follicles, in many individuals, leads to


A. eczema.

B. carbuncles.

C. boils.

D. acne.

D. acne.

12

The principal species of Staphylococcus found on the skin is


A. aureus.

B. acnes.

C. pyogenes.

D. epidermidis.

D. epidermidis.

13

The bacteria that appear to maintain balance between the members of the normal flora and play a vital role in limiting colonization by pathogens are


A. staphylococci.

B. diptheroids.

C. Candida spp.

D. Malassezia spp.

A. staphylococci.

14

Which of the following may be added to normal media to make it more selective for staphylococci?


A. 7.5% salt

B. 0.5% HCl

C. 1.0% glucose

D. 5.0% mannose

A. 7.5% salt

15

The member of the normal flora sometimes considered responsible for tinea versicolor is


A. staphylococci.

B. diptheroids.

C. Candida spp.

D. Malassezia spp.

D. Malassezia spp.

16

Which is deemed the most serious staphylococcal skin infection?


A. tinea versicolor

B. folliculitis

C. furuncles

D. carbuncles

D. carbuncles

17

A protein associated with a more virulent form of Staphylococcus is


A. leukocidin.

B. mannose.

C. streptokinase.

D. coagulase.

D. coagulase.

18

The protein produced by S. aureus that interferes with phagocytosis is


A. protein M.

B. collagen.

C. protein A.

D. capsular protein.

C. protein A.

19

The preferred habitat of S. aureus is the


A. throat.

B. urethra.

C. bladder.

D. nasal chamber.

D. nasal chamber.

20

Which of the following is a fairly reliable method of characterizing strains of S. aureus?


A. complement fixation

B. protein fingerprint

C. genome typing

D. LPS pattern

C. genome typing

21

Which of the following may aid Staphylococcus in resisting phagocytosis?


A. leukocidin

B. hemolysin

C. granulation enzyme

D. coagulase

D. coagulase

22

Which of the following virulence factors used by Staphylococcus puts holes in host cells?


A. protein A

B. alpha toxin

C. leukocidin

D. clumping factor

B. alpha toxin

23

S. aureus clumping factor


A. causes fibrinogen to clump together.

B. causes bacteria to clump together in plasma.

C. reacts with prothrombin.

D. produces staphylothrombin.

B. causes bacteria to clump together in plasma.

24

Which is true of MRSA?


A. It stands for moxicillin resistant Staphylococcus aureus.

B. They have R plasmids.

C. They may be sensitive to Synercid.

D. All MRSA strains remain sensitive to vancomycin.

E. They have R plasmids AND they may be sensitive to Synercid.

E. They have R plasmids AND they may be sensitive to Synercid.

25

Approximately 90% of S. aureus strains are resistant to


A. methicillin.

B. tetracyclin.

C. polymyxin B.

D. penicillin.

D. penicillin.

26

The S. aureus product that causes scalded skin syndrome is/are


A. exfoliation toxin.

B. lipases.

C. leukocidins.

D. protein M.

E. All of the choices are correct.

A. exfoliation toxin.

27

A frequent complication of scalded skin syndrome is a secondary infection caused by


A. M. luteus.

B. S. pyogenes.

C. S. epidermidis.

D. Pseudomonas spp.

D. Pseudomonas spp.

28

In addition to S. aureus, impetigo may also involve


A. M. luteus.

B. S. pyogenes.

C. S. epidermidis.

D. Pseudomonas spp.

B. S. pyogenes.

29

In S. pyogenes, which of the following interferes with phagocytosis?


A. M protein

B. protein A

C. collagen

D. pilin

A. M protein

30

In which of the following does a rash start on the palms and soles and progress toward the trunk?


A. Epidemic typhus

B. Typhoid

C. Lyme disease

D. Impetigo

E. Rocky Mountain spotted fever

E. Rocky Mountain spotted fever