Question 1

Which of the following is not true of cellulitis?

Accepted Answer

A)  Surgery may be required for treatment.
B)  Lymphangitis may occur with this infection.
C)  It is caused by S.aureus or S.pyogenes.
D)  It affects the epidermis layer of the skin.
E)  It causes pain, tenderness, swelling, and warmth.F) C) and D)
G) B) and D)

Question 2

Which of the following is not true of bacterial conjunctivitis?

Accepted Answer

A)  It can be caused by S.pyogenes or S.pneumoniae.
B)  Infection produces a clear discharge from the eye.
C)  It can be transmitted through both direct and indirect contact.
D)  Treatment is with a broad-spectrum topical antibiotic.E) A) and B)
F) A) and C)

Question 3

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) A) and B)
F) A) and C)

Question 4

The disease pathogenesis seen in river blindness is caused by ______.

Accepted Answer

A)  Wolbachia bacteria
B)  Onchocerca volvulus worms
C)  a blood fluke
D)  herpes simplex virus type 1 (HSV-1) 
E)  Both Wolbachia and Onchocerca volvulus are correct.F) B) and E)
G) B) and C)

Question 5

The two tissues of the eye with exposed surfaces susceptible to contamination are the ______ and the ______.

Accepted Answer

A)  conjunctiva; cornea
B)  conjunctiva; lens
C)  cornea; lens
D)  conjunctiva; iris
E)  cornea; irisF) All of the above
G) A) and E)

Question 6

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 E)
G) None of the above

Question 7

All warts caused by human papillomaviruses are linked to cancers.

Accepted Answer

A) True 
 B)False

Question 8

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) A) and C)

Question 9

In a recent surgery, when the cut area was sutured, bacteria entered the open tissue.As a result, you now have an infection of deep tissue exhibiting redness, swelling, pain, fever, and a rash.With your knowledge of microbiology, you predict that you have a developed an infection caused by ______.

Accepted Answer

A)  Neisseria
B)  human herpesvirus 3
C)   E.coli
D)  StaphylococcusE) None of the above
F) A) and D)

Question 10

Your child has developed an eye infection with a yellowish discharge.You predict that this is a case of ______.

Accepted Answer

A)  herpes keratitis
B)  bacterial conjunctivitis
C)  helminth infection
D)  rubella
E)  trachomaF) B) and E)
G) A) and B)

Question 11

Your sister cut herself with a knife, and within a few days, she had a severe pus-producing infection of the hand.A day later, skin begins to come off, exposing muscle and other tissue below the skin.Predict what caused the severity of this infection.

Accepted Answer

A)  The infectious agent is a fungus.
B)  This is not an infectious disease; it is an autoimmune disease.
C)  The infectious agent produces exotoxins.
D)  The infectious agent is likely a virus.E) B) and C)
F) A) and D)

Question 12

The integument includes all of the following except ______.

Accepted Answer

A)  skin
B)  hair
C)  sweat glands
D)  surface capillaries
E)  nailsF) D) and E)
G) C) and E)

Question 13

Neonatal conjunctivitis differs from non-neonatal conjunctivitis in that

Accepted Answer

A)  it is transmitted during birth and occurs only in neonates less than 4 weeks old.
B)  neonates have immune privilege, and are therefore more susceptible to all types of infection.
C)  it cannot be prevented as the causative organisms are normal microbiota for the mother.
D)  neonatal conjunctivitis can be caused by Chlamydia trachomatis, Neisseria gonnorhoeae, or any number of viruses.E) B) and C)
F) A) and B)

Question 14

Occassionally, Staphylococcus epidermidis may be isolated from the eye.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following statements is incorrect about the MMR vaccine?

Accepted Answer

A)  It is given in early childhood.
B)  It contains toxoids.
C)  It protects against three different viral diseases.
D)  It contains attenuated viruses.E) A) and B)
F) A) and C)

Question 16

Cutaneous anthrax is

Accepted Answer

A)  seen in epidemic proportions in the United States.
B)  a high mortality disease.
C)  found only in humans.
D)  transmitted by contact.E) A) and D)
F) B) and D)

Question 17

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) C) and D)
G) A) and D)

Question 18

In the skin, blood vessels are found in the ______.

Accepted Answer

A)  dermis and subcutaneous layers
B)  dermis
C)  stratum corneum
D)  subcutaneous layer
E)  stratum basaleF) A) and D)
G) B) and E)

Question 19

Chickenpox

Accepted Answer

A)  is transmitted by inhalation of respiratory secretions.
B)  is transmitted by skin lesion contact or airborne spread of lesion material.
C)  has an incubation period of 10 to 20 days.
D)  has fever and vesicular rash that occurs in successive crops.
E)  All of the choices are correct.F) A) and E)
G) A) and B)

Question 20

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) A) and C)
G) None of the above

Exam 18: Infectious Diseases Affecting the Skin and Eyes

Which of the following is not true of bacterial conjunctivitis?

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The main causative agent of gas gangrene is ______.

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Which of the following is not true of cellulitis?

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The disease pathogenesis seen in river blindness is caused by ______.

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

Which of the following statement is incorrect about warts?

Correct AnswerverifiedShow Answer

Occassionally, Staphylococcus epidermidis may be isolated from the eye.

Correct AnswerverifiedShow Answer

Chickenpox

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Which of the following statements about blisters is correct?

Correct AnswerverifiedShow Answer

Your sister cut herself with a knife, and within a few days, she had a severe pus-producing infection of the hand.A day later, skin begins to come off, exposing muscle and other tissue below the skin.Predict what caused the severity of this infection.

Correct AnswerverifiedShow Answer

Cutaneous anthrax is

Correct AnswerverifiedShow Answer

Which of the following statements is incorrect about the MMR vaccine?

Correct AnswerverifiedShow Answer

Neonatal conjunctivitis differs from non-neonatal conjunctivitis in that

Correct AnswerverifiedShow Answer

Your child has developed an eye infection with a yellowish discharge.You predict that this is a case of ______.

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

The integument includes all of the following except ______.

Correct AnswerverifiedShow Answer

In a recent surgery, when the cut area was sutured, bacteria entered the open tissue.As a result, you now have an infection of deep tissue exhibiting redness, swelling, pain, fever, and a rash.With your knowledge of microbiology, you predict that you have a developed an infection caused by ______.

Correct AnswerverifiedShow Answer

The two tissues of the eye with exposed surfaces susceptible to contamination are the ______ and the ______.

Correct AnswerverifiedShow Answer

In the skin, blood vessels are found in the ______.

Correct AnswerverifiedShow Answer

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The two tissues of the eye with exposed surfaces susceptible to contamination are the and the .

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