Question 1

Staphylococcus can be differentiated from Streptococcus by the ______.

Accepted Answer

A)   Gram stain
B)   catalase test
C)   fermentation of mannitol
D)   coagulase test
E)   cellular morphologyF) A) and E)
G) All of the above

Question 2

The enzyme that clots plasma is ______.

Accepted Answer

A)   catalase
B)   staphylokinase
C)   hyaluronidase
D)   kinase
E)   coagulaseF) B) and E)
G) A) and E)

Question 3

A higher rate of eye infections can be expected from a person who _____.

Accepted Answer

A)   is very young
B)   wears glasses
C)   cannot produce tears
D)   has a vitamin deficiencyE) A) and B)
F) B) and C)

Question 4

Impetigo can be caused by either Staphylococcus aureus or Streptococcus pyogenes.Culture-based identification of the causative organism can be complicated by

Accepted Answer

A)   the common surface antigens of these two organisms.
B)   the ability of S. aureus to kill S. pyogenes.
C)   the fastidious nature of both organisms.
D)   their common optimal growth temperature, 37°C.E) B) and C)
F) A) and D)

Question 5

The main causative agent of gas gangrene is ______.

Accepted Answer

A)   Streptococcus pyogenes
B)   Clostridium perfringens
C)   Staphylococcus aureus
D)   Mycobacterium leprae
E)   Staphylococcus epidermidisF) A) and C)
G) D) and E)

Question 6

Considering the diseases and conditions described in this chapter,those transmitted by respiratory droplets are caused by ______.

Accepted Answer

A)   viruses
B)   bacteria
C)   fungi
D)   All of these answers are correct.E) B) and D)
F) A) and C)

Question 7

Which of the following provides the eye with its best defense against microorganisms?

Accepted Answer

A)   Tears
B)   Conjunctiva
C)   Eyelashes
D)   Eyelids
E)   LymphocytesF) B) and E)
G) None of the above

Question 8

Molluscum contagiosum is transmitted by direct contact with skin lesions,fomites,and sexual activity.

Accepted Answer

A) True 
 B)False

Question 9

Measles is also known as ______.

Accepted Answer

A)   varicella
B)   fifth disease
C)   rubella
D)   shingles
E)   rubeolaF) B) and E)
G) None of the above

Question 10

Occassionally,Staphylococcus epidermidis may be isolated from the eye.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following statements about blisters is correct?

Accepted Answer

A)   Blisters result from a separation of epidermis from dermis.
B)   Blisters originate in the subcutaneous layer.
C)   Blisters are confined to the epidermis.
D)   Blisters originate in the dermis.E) None of the above
F) All of the above

Question 12

Which of the following is not a causative agent of cutaneous mycoses?

Accepted Answer

A)   Malassezia
B)   Trichophyton
C)   Microsporum
D)   EpidermophytonE) None of the above
F) C) and D)

Question 13

Mannitol salt agar is selective for Staphylococcus aureus because this organism

Accepted Answer

A)   can withstand high salt concentration.
B)   can synthesize catalase.
C)   is unique in its ability to ferment mannitol.
D)   is often resistant to methicillin.
E)   can tolerate brief exposures to high temperature.F) B) and E)
G) B) and D)

Question 14

Keratitis is usually caused by ______.

Accepted Answer

A)   Streptococcus pyogenes
B)   Staphylococcus aureus
C)   Neisseria gonorrhoeae
D)   herpes simplex virus type 1 (HSV-1) E) None of the above
F) A) and D)

Question 15

Which of the following statement is incorrect about warts?

Accepted Answer

A)   Topical salicylic acid can be used for removal.
B)   They are frequently cancerous.
C)   They are transmitted by direct contact or fomites.
D)   They include deep plantar warts on the soles of the feet.
E)   They are caused by human papillomaviruses (HPV) .F) A) and B)
G) C) and E)

Question 16

To perform the coagulase test on a strain of bacteria that is believed to be S.aureus,the first step is to inoculate a tube of ______ with the strain of interest.

Accepted Answer

A)   blood plasma
B)   nutrient broth
C)   mannitol salt medium
D)   bloodE) B) and D)
F) B) and C)

Question 17

Which of the following statements is incorrect regarding the effects of rubella and rubeola in different populations?

Accepted Answer

A)   Infection during pregnancy with either of these viruses can cause serious injury to the fetus.
B)   A 30-year-old man infected with rubella will experience severe symptoms and require constant medical attention for several weeks.
C)   A six-year-old child infected with rubeola will experience fever, cough, and a rash, and barring complications, should recover in a few weeks.
D)   Congenital rubella is least serious if it is contracted during the final trimester of pregnancy.E) A) and C)
F) A) and B)

Question 18

Which of the following statements regarding vaccines as disease preventatives is incorrect?

Accepted Answer

A)   Zostavax is recommended for older adults to prevent shingles.
B)   The Carter Center has promoted the development of a vaccine against river blindness.
C)   There is currently no smallpox vaccine available to the general public.
D)   Immunization is currently not possible against Clostridium perfringens.E) A) and B)
F) C) and D)

Question 19

All warts caused by human papillomaviruses are linked to cancers.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following is mismatched?

Accepted Answer

A)   Tinea capitis - ringworm of the beard
B)   Tinea cruis - ringworm of the groin
C)   Tinea unguium - ringworm of the nails
D)   Tinea corporis - ringworm of the body
E)   Tinea pedis - ringworm of the footF) A) and B)
G) B) and E)

Exam 18: Infectious Diseases Affecting the Skin and Eyes

A higher rate of eye infections can be expected from a person who _____.

Correct AnswerverifiedShow Answer

Which of the following statement is incorrect about warts?

Correct AnswerverifiedShow Answer

Keratitis is usually caused by ______.

Correct AnswerverifiedShow Answer

The enzyme that clots plasma is ______.

Correct AnswerverifiedShow Answer

Molluscum contagiosum is transmitted by direct contact with skin lesions,fomites,and sexual activity.

Correct AnswerverifiedShow Answer

Staphylococcus can be differentiated from Streptococcus by the ______.

Correct AnswerverifiedShow Answer

The main causative agent of gas gangrene is ______.

Correct AnswerverifiedShow Answer

Measles is also known as ______.

Correct AnswerverifiedShow Answer

Which of the following is not a causative agent of cutaneous mycoses?

Correct AnswerverifiedShow Answer

Which of the following statements regarding vaccines as disease preventatives is incorrect?

Correct AnswerverifiedShow Answer

To perform the coagulase test on a strain of bacteria that is believed to be S.aureus,the first step is to inoculate a tube of ______ with the strain of interest.

Correct AnswerverifiedShow Answer

Considering the diseases and conditions described in this chapter,those transmitted by respiratory droplets are caused by ______.

Correct AnswerverifiedShow Answer

Occassionally,Staphylococcus epidermidis may be isolated from the eye.

Correct AnswerverifiedShow Answer

Which of the following provides the eye with its best defense against microorganisms?

Correct AnswerverifiedShow Answer

Which of the following statements is incorrect regarding the effects of rubella and rubeola in different populations?

Correct AnswerverifiedShow Answer

Which of the following is mismatched?

Correct AnswerverifiedShow Answer

Impetigo can be caused by either Staphylococcus aureus or Streptococcus pyogenes.Culture-based identification of the causative organism can be complicated by

Correct AnswerverifiedShow Answer

Mannitol salt agar is selective for Staphylococcus aureus because this organism

Correct AnswerverifiedShow Answer

All warts caused by human papillomaviruses are linked to cancers.

Correct AnswerverifiedShow Answer

Which of the following statements about blisters is correct?

Correct AnswerverifiedShow Answer

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