Question 1

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

Question 2

Staphylococcus aureus is responsible for all of the following EXCEPT

Accepted Answer

A)  pimples. 
B)  acne. 
C)  carbuncles. 
D)  sties. 
E)  boils. 
A)  pimples. 
B)  acne. 
C)  carbuncles. 
D)  sties. 
E)  boils. B

Question 3

The eradication of smallpox was possible because

Accepted Answer

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

Question 4

All of the following are normal microbiota of the skin EXCEPT

Accepted Answer

A)  Corynebacterium. 
B)  Staphylococcus. 
C)  Micrococcus. 
D)  Propionibacterium. 
E)  Streptococcus. 
A)  Corynebacterium. 
B)  Staphylococcus. 
C)  Micrococcus. 
D)  Propionibacterium. 
E)  Streptococcus.

Question 5

A 17-year-old boy has pus-filled cysts on his face and upper back. Microscopic examination reveals gram-positive rods. This infection is caused by

Accepted Answer

A)  Propionibacterium acnes. 
B)  Acanthamoeba. 
C)  Staphylococcus aureus. 
D)  herpes simplex virus. 
E)  Streptococcus pyogenes. 
A)  Propionibacterium acnes. 
B)  Acanthamoeba. 
C)  Staphylococcus aureus. 
D)  herpes simplex virus. 
E)  Streptococcus pyogenes.

Question 6

Which of the following is incorrectly matched?

Accepted Answer

A)  Neisseria gonorrhea  opthalmia neonatorum 
B)  Pseudomonas  inclusion conjunctivitis 
C)  Acanthamoeba  keratitis 
D)  Haemophilus influenzae  pinkeye 
E)  Chlamydia trachomatis  trachoma 
A)  Neisseria gonorrhea  opthalmia neonatorum 
B)  Pseudomonas  inclusion conjunctivitis 
C)  Acanthamoeba  keratitis 
D)  Haemophilus influenzae  pinkeye 
E)  Chlamydia trachomatis  trachoma

Question 7

Buruli ulcer is caused by

Accepted Answer

A)  a virus. 
B)  a mite. 
C)  a fungus. 
D)  gram-positive bacteria. 
E)  acid-fast bacteria. 
A)  a virus. 
B)  a mite. 
C)  a fungus. 
D)  gram-positive bacteria. 
E)  acid-fast bacteria.

Question 8

All of the following are characteristic of Pseudomonas aeruginosa EXCEPT

Accepted Answer

A)  production of pyocyanin. 
B)  rod-shaped. 
C)  gram-positive cell wall. 
D)  growth in moist environments. 
E)  resistance to many types of disinfectants and antibiotics. 
A)  production of pyocyanin. 
B)  rod-shaped. 
C)  gram-positive cell wall. 
D)  growth in moist environments. 
E)  resistance to many types of disinfectants and antibiotics.

Question 9

Which of the following pairs is mismatched?

Accepted Answer

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

Question 10

Acanthamoeba infections are usually transmitted via insects.

Accepted Answer

A) True 
 B)False

Question 11

Currently, the only remaining stocks of smallpox are located in the United States and in Russia. Several dates for the destruction of these stocks have been set, but then postponed. Discuss the pros and cons of destroying these remaining smallpox stocks. Do you feel they should be destroyed? Explain your answer.

Accepted Answer

The decision to destroy the remaining st

Question 12

Which of the following is NOT true of acne?

Accepted Answer

A)  It is often due to the action of Propionibacterium. 
B)  Antibiotics may be prescribed for moderate cases. 
C)  It can be treated by eliminating fatty foods from the diet. 
D)  Drugs that inhibit sebum formation are useful in treating inflammatory acne. 
E)  Mild cases are treated with topical agents. 
A)  It is often due to the action of Propionibacterium. 
B)  Antibiotics may be prescribed for moderate cases. 
C)  It can be treated by eliminating fatty foods from the diet. 
D)  Drugs that inhibit sebum formation are useful in treating inflammatory acne. 
E)  Mild cases are treated with topical agents.

Question 13

Which of the following leads to all the others?

Accepted Answer

A)  staphylococcal infection 
B)  toxemia 
C)  sudden drop in blood pressure 
D)  scalded skin syndrome 
E)  TSST-1 
A)  staphylococcal infection 
B)  toxemia 
C)  sudden drop in blood pressure 
D)  scalded skin syndrome 
E)  TSST-1

Question 14

Compare and contrast the virulence factors associated with Staphylococcus and Streptococcus. Which of these agents is the most difficult to treat? Explain your answer.

Accepted Answer

Staphylococcus and Streptococcus are bot

Question 15

Which of the following are incorrectly matched?

Accepted Answer

A)  herpes zoster  shingles 
B)  poxvirus  fever blisters 
C)  HHV-6  roseola 
D)  varicella-zoster  chickenpox 
E)  parvovirus  fifth disease 
A)  herpes zoster  shingles 
B)  poxvirus  fever blisters 
C)  HHV-6  roseola 
D)  varicella-zoster  chickenpox 
E)  parvovirus  fifth disease

Question 16

Thrush and vaginitis are caused by

Accepted Answer

A)  Candida albicans. 
B)  Staphylococcus aureus. 
C)  herpesvirus. 
D)  Chlamydia trachomatis. 
E)  Streptococcus pyogenes. 
A)  Candida albicans. 
B)  Staphylococcus aureus. 
C)  herpesvirus. 
D)  Chlamydia trachomatis. 
E)  Streptococcus pyogenes.

Question 17

Which of the following is used to treat shingles?

Accepted Answer

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

Question 18

Why is vaccination for rubella recommended?

Accepted Answer

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

Question 19

All of the following are protective factors of the skin and its secretions EXCEPT

Accepted Answer

A)  keratin. 
B)  tightly packed cells. 
C)  salt. 
D)  pyocyanin production. 
E)  lysozyme production. 
A)  keratin. 
B)  tightly packed cells. 
C)  salt. 
D)  pyocyanin production. 
E)  lysozyme production.

Question 20

Which of the following is used to treat herpetic keratitis?

Accepted Answer

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

Exam 21: Microbial Diseases of the Skin and Eyes

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

Staphylococcus aureus is responsible for all of the following EXCEPT

The eradication of smallpox was possible because

All of the following are normal microbiota of the skin EXCEPT

A 17-year-old boy has pus-filled cysts on his face and upper back. Microscopic examination reveals gram-positive rods. This infection is caused by

Which of the following is incorrectly matched?

Buruli ulcer is caused by

All of the following are characteristic of Pseudomonas aeruginosa EXCEPT

Which of the following pairs is mismatched?

Acanthamoeba infections are usually transmitted via insects.

Which of the following is NOT true of acne?

Which of the following leads to all the others?

Compare and contrast the virulence factors associated with Staphylococcus and Streptococcus. Which of these agents is the most difficult to treat? Explain your answer.

Which of the following are incorrectly matched?

Thrush and vaginitis are caused by

Which of the following is used to treat shingles?

Why is vaccination for rubella recommended?

All of the following are protective factors of the skin and its secretions EXCEPT

Which of the following is used to treat herpetic keratitis?

The Microbial World and You

Chemical Principles

Observing Microorganisms Through a Microscope

Functional Anatomy of Prokaryotic and Eukaryotic Cells

Microbial Metabolism

Microbial Growth

The Control of Microbial Growth

Microbial Genetics

Biotechnology and Dna Technology

Classification of Microorganisms

The Prokaryotes: Domains Bacteria and Archaea

The Eukaryotes: Fungi, Algae, Protozoa, and Helminths

Viruses, Viroids, and Prions

Principles of Disease and Epidemiology

Microbial Mechanisms of Pathogenicity

Innate Immunity: Nonspecific Defenses of the Host

Adaptive Immunity: Specific Defenses of the Host

Practical Applications of Immunology

Disorders Associated With the Immune System

Antimicrobial Drugs

Microbial Diseases of the Nervous System

Microbial Diseases of the Cardiovascular and Lymphatic Systems

Microbial Diseases of the Respiratory System

Microbial Diseases of the Digestive System

Microbial Disease of the Urinary and Reproductive Systems

Environmental Microbiology

Applied and Industrial Microbiology

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