Question 1

The patient has scaling skin on his fingers. Conidiospores are seen in microscopic examination of skin scrapings. The etiology is

Accepted Answer

A)   Mycobacterium ulcerans.
B)   Staphylococcus aureus.
C)   Candida.
D)   Microsporum.
E)   Pseudomonas aeruginosa.

Question 2

The eradication of smallpox was possible because

Accepted Answer

A)   it can be prevented with the same vaccine used to prevent chickenpox.
B)   there are no animal reservoirs of the virus.
C)   insect vectors were eliminated.
D)   it occurs only in the tropics.
E)   it was a relatively mild disease.

Question 3

Blue- green pus is characteristic of Pseudomonas wound infections.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following pairs is mismatched?

Accepted Answer

A)   Buruli ulcer - Mycobacterium
B)   otitis externa - Pseudomonas
C)   keratitis - Acanthamoeba
D)   conjunctivitis - Chlamydia trachomatis
E)   chickenpox - poxvirus

Question 5

Scabies is a skin disease caused by a

Accepted Answer

A)   protozoan.
B)   mite.
C)   slow virus.
D)   bacterium.
E)   prion.

Question 6

Exfoliative toxin is responsible for

Accepted Answer

A)   fever blisters.
B)   scalded skin syndrome.
C)   otitis externa.
D)   thrush.
E)   impetigo.

Question 7

Why is vaccination for rubella recommended?

Accepted Answer

A)   It has a high mortality rate in school- age children.
B)   Death from secondary infections is common.
C)   Health care workers have a high incidence of infection.
D)   There is a high incidence of congenital infections and birth defects.
E)   It is no longer recommended; rubella has been eradicated.

Question 8

Newborns' eyes are treated with an antibiotic

Accepted Answer

A)   when Neisseria gonorrhoeae is isolated from the eyes.
B)   when the mother is blind.
C)   when the mother has genital herpes.
D)   when the mother has gonorrhea.
E)   as a routine precaution.

Question 9

List the disease symptoms and virulence factors associated with Pseudomonas infections. Why can Pseudomonas
be difficult to control in a hospital environment?

Accepted Answer

Pseudomonas infections can cause a range...

Question 10

The patient has a papular rash. Microscopic examination of skin scrapings reveals small eight- legged animals. The etiology is

Accepted Answer

A)   Staphylococcus aureus.
B)   Sarcoptes.
C)   Microsporum.
D)   Candida.
E)   Pseudomonas aeruginosa.

Question 11

Which of the following is used to treat herpetic keratitis?

Accepted Answer

A)   trifluridine
B)   penicillin
C)   fungicide
D)   sulfonamide
E)   acyclovir

Question 12

The greatest single cause of blindness in the world is

Accepted Answer

A)   pinkeye.
B)   trachoma.
C)   inclusion conjunctivitis.
D)   neonatal gonorrheal ophthalmia.
E)   keratoconjunctivitis.

Question 13

The patient has vesicles and scabs over her forehead. Microscopic examination of skin scrapings shows gram- positive cocci in clusters. The etiology is

Accepted Answer

A)   Pseudomonas aeruginosa.
B)   Staphylococcus aureus.
C)   Sarcoptes.
D)   Microsporum.
E)   Candida.

Question 14

A possible complication of chickenpox is

Accepted Answer

A)   congenital rubella syndrome.
B)   fever blisters.
C)   subacute sclerosing panencephalitis.
D)   macular rash.
E)   encephalitis.

Question 15

Which of the following statements about congenital rubella syndrome is FALSE?

Accepted Answer

A)   It can be prevented by vaccinating women prior to pregnancy.
B)   It may be fatal to the unborn child.
C)   It does not occur with subclinical infections.
D)   It is contracted during the first trimester of pregnancy.
E)   It may result in deafness, blindness, and mental retardation.

Question 16

Assume that your lab partner swabs the side of his face and uses the swab to inoculate a nutrient agar plate. The next day, he performs a Gram stain on the colonies. They are gram- positive cocci. You advise him that he should next look for

Accepted Answer

A)   conidiospores.
B)   pseudopods.
C)   a coagulase reaction.
D)   an acid- fast reaction.
E)   pseudohyphae.

Question 17

The abbreviation "GAS" refers to pathogenic strains of Staphylococcus.

Accepted Answer

A) True 
 B)False

Question 18

Pathogens of the skin often enter via hair follicles and ducts of the sweat glands.

Accepted Answer

A) True 
 B)False

Question 19

A 45- year- old man has pus- filled vesicles distributed over his back in the upper right quadrant, over his right shoulder, and upper right quadrant of his chest. His symptoms are most likely due to

Accepted Answer

A)   varicella- zoster virus.
B)   Streptococcus pyogenes.
C)   herpes simplex virus.
D)   Staphylococcus aureus.
E)   Candida albicans.

Question 20

In which of the following respects is measles similar to German measles (rubella) ?

Accepted Answer

A)   Encephalitis is a possible complication.
B)   Congenital complications may occur.
C)   They have a similar type of rash.
D)   They are caused by the same virus.
E)   They can be controlled by vaccination.

Exam 21: Microbial Diseases of the Skin and Eyes

Blue- green pus is characteristic of Pseudomonas wound infections.

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Pathogens of the skin often enter via hair follicles and ducts of the sweat glands.

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Assume that your lab partner swabs the side of his face and uses the swab to inoculate a nutrient agar plate. The next day, he performs a Gram stain on the colonies. They are gram- positive cocci. You advise him that he should next look for

Correct AnswerverifiedShow Answer

Which of the following pairs is mismatched?

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The patient has vesicles and scabs over her forehead. Microscopic examination of skin scrapings shows gram- positive cocci in clusters. The etiology is

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List the disease symptoms and virulence factors associated with Pseudomonas infections. Why can Pseudomonas be difficult to control in a hospital environment?

Correct AnswerAnswered by ExamLex AIPseudomonas infections can cause a range...View AnswerShow Answer

A 45- year- old man has pus- filled vesicles distributed over his back in the upper right quadrant, over his right shoulder, and upper right quadrant of his chest. His symptoms are most likely due to

Correct AnswerverifiedShow Answer

Which of the following statements about congenital rubella syndrome is FALSE?

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Exfoliative toxin is responsible for

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A possible complication of chickenpox is

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Why is vaccination for rubella recommended?

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In which of the following respects is measles similar to German measles (rubella) ?

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Scabies is a skin disease caused by a

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The patient has scaling skin on his fingers. Conidiospores are seen in microscopic examination of skin scrapings. The etiology is

Correct AnswerverifiedShow Answer

Newborns' eyes are treated with an antibiotic

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The abbreviation "GAS" refers to pathogenic strains of Staphylococcus.

Correct AnswerverifiedShow Answer

The eradication of smallpox was possible because

Correct AnswerverifiedShow Answer

The patient has a papular rash. Microscopic examination of skin scrapings reveals small eight- legged animals. The etiology is

Correct AnswerverifiedShow Answer

Which of the following is used to treat herpetic keratitis?

Correct AnswerverifiedShow Answer

The greatest single cause of blindness in the world is

Correct AnswerverifiedShow Answer

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Pseudomonas infections can cause a range...
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