Question 1

Acanthamoeba infections are usually transmitted via insects.

Accepted Answer

A) True 
 B)False  False

Question 2

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

Question 3

All of the following are characteristic of the Group A beta-hemolytic streptococci EXCEPT

Accepted Answer

A) methicillin resistance. 
B) M proteins. 
C) the ability to damage cell membranes. 
D) the ability to dissolve blood clots. 
E) hyaluronidase production. 
A) methicillin resistance. 
B) M proteins. 
C) the ability to damage cell membranes. 
D) the ability to dissolve blood clots. 
E) hyaluronidase production. A

Question 4

Scabies is transmitted by

Accepted Answer

A) fomites. 
B) food. 
C) water. 
D) soil. 
E) respiratory secretions. 
A) fomites. 
B) food. 
C) water. 
D) soil. 
E) respiratory secretions.

Question 5

The majority of the staphylococci isolated from human skin are coagulase-positive.

Accepted Answer

A) True 
 B)False

Question 6

All of the following are characteristic of Pseudomonas aeruginosa EXCEPT

Accepted Answer

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

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

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 9

Which of the following is NOT true of acne?

Accepted Answer

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

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

Which region of the skin supports the largest bacterial population?

Accepted Answer

A) armpits 
B) scalp 
C) forearms 
D) feet 
E) All of these support similarly sized bacterial populations. 
A) armpits 
B) scalp 
C) forearms 
D) feet 
E) All of these support similarly sized bacterial populations.

Question 12

An eight-year-old girl has scabs and pus-filled vesicles on her face and throat.Three weeks earlier she had visited her grandmother,who had shingles.What infection does the eight-year-old have?

Accepted Answer

A) chickenpox 
B) measles 
C) fever blisters 
D) scabies 
E) rubella 
A) chickenpox 
B) measles 
C) fever blisters 
D) scabies 
E) rubella

Question 13

All of the following are causative agents of conjunctivitis EXCEPT

Accepted Answer

A) Chlamydia trachomatis. 
B) herpes simplex. 
C) adenovirus. 
D) Neisseria gonorrhoeae. 
E) Haemophilus influenzae. 
A) Chlamydia trachomatis. 
B) herpes simplex. 
C) adenovirus. 
D) Neisseria gonorrhoeae. 
E) Haemophilus influenzae.

Question 14

Exfoliative toxin is responsible for

Accepted Answer

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

Question 15

All of the following are normal microbiota of the skin EXCEPT

Accepted Answer

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

Question 16

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 17

A patient has pus-filled vesicles and scabs on her face,throat,and lower back.She most likely has

Accepted Answer

A) measles. 
B) mumps. 
C) chickenpox. 
D) rubella. 
E) smallpox. 
A) measles. 
B) mumps. 
C) chickenpox. 
D) rubella. 
E) smallpox.

Question 18

Which of the following is used to treat herpetic keratitis?

Accepted Answer

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

Question 19

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

Question 20

Scabies is a skin disease caused by a

Accepted Answer

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

Exam 21: Microbial Diseases of the Skin and Eyes

Acanthamoeba infections are usually transmitted via insects.

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

All of the following are characteristic of the Group A beta-hemolytic streptococci EXCEPT

Scabies is transmitted by

The majority of the staphylococci isolated from human skin are coagulase-positive.

All of the following are characteristic of Pseudomonas aeruginosa EXCEPT

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

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 is NOT true of acne?

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

Which region of the skin supports the largest bacterial population?

An eight-year-old girl has scabs and pus-filled vesicles on her face and throat.Three weeks earlier she had visited her grandmother,who had shingles.What infection does the eight-year-old have?

All of the following are causative agents of conjunctivitis EXCEPT

Exfoliative toxin is responsible for

All of the following are normal microbiota of the skin EXCEPT

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

A patient has pus-filled vesicles and scabs on her face,throat,and lower back.She most likely has

Which of the following is used to treat herpetic keratitis?

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

Scabies is a skin disease caused by a

The Microbial World and You

Chemical Principles

Observing Microorganisms Through a Microscope

Functional Anatomy of Prokaryotic and Eukaryotic

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 Diseases of the Urinary and Reproductive Systems

Environmental Microbiology

Applied and Industrial Microbiology

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