Deck 21: Microbial Diseases of the Skin and Eyes

Question 1

Newbornsʹ eyes are treated with an antibiotic

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

Answer 1

E

Question 2

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

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

Answer 2

D

Question 3

All of the following are normal microbiota of the skin EXCEPT

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

Answer 3

E

Question 4

Warts are caused by

A) poxvirus.
B) herpesvirus.
C) Staphylococcus aureus.
D) papillomavirus.
E) parvovirus.

Question 5

Which of the following cause(s) ringworm?

A) Microsporum
B) Mycobacterium
C) Epidermophyton
D) Microsporum and Epidermophyton
E) Microsporum, Epidermophyton, and Mycobacterium

Question 6

A possible complication of chickenpox is

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

Question 7

Which of the following is a subcutaneous mycosis?

A) sporotrichosis.
B) Buruli ulcer.
C) athleteʹs foot.
D) erysipelas.
E) tinea capitis.

Question 8

Which region of the skin supports the largest bacterial population?

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

Question 9

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

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

Question 10

The greatest single cause of blindness in the world is

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

Question 11

All of the following are characteristic of Pseudomonas aeruginosa EXCEPT

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 12

Staphylococcus aureus is responsible for all of the following EXCEPT

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

Question 13

Exfoliative toxin is responsible for

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

Question 14

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

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

Question 15

Thrush and vaginitis are caused by

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

Question 16

All of the following are transmitted via the respiratory route EXCEPT

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

Question 17

All of the following are causative agents of conjunctivitis EXCEPT

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

Question 18

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?

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

Question 19

Which of the following is NOT true of acne?

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 20

Koplik spots are a diagnostic indicator of

A) chickenpox.
B) fifth disease.
C) rubella.
D) measles.
E) smallpox.

Question 21

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

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

Question 22

Which of the following is NOT caused by HSV-1?

A) herpes gladiatorum
B) herpes encephalitis
C) canker sores
D) cold sores
E) herpes whitlow

Question 23

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

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

Question 24

Which of the following is used to treat sporotrichosis?

A) oral potassium iodide
B) trifluridine
C) sulfonamide
D) penicillin
E) acyclovir

Question 25

Which of the following is used to treat shingles?

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

Question 26

Buruli ulcer is caused by

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

Question 27

Scabies is a skin disease caused by a

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

Question 28

Which of the following leads to all the others?

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

Question 29

Why is vaccination for rubella recommended?

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 30

Which of the following is used to treat herpetic keratitis?

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

Question 31

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

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

Question 32

Which of the following is used to treat candidiasis of the skin or mucous membranes?

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

Question 33

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

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

Question 34

Which of the following statements about Reye syndrome is FALSE?

A) It is associated with aspirin use.
B) Symptoms may include vomiting, drowsiness, or behavior changes.
C) It is a complication that may occur in chickenpox infection.
D) Prolonged neurological problems may occur.
E) It mostly affects older adults.

Question 35

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

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

Question 36

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

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

Question 37

Scabies is transmitted by

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

Question 38

A 35-year-old woman has a red, raised rash on the inside of her thighs. Gram -stained skin scrapings show large budding cells with pseudohyphae. The infection is caused by

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

Question 39

The eradication of smallpox was possible because

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.

Question 40

Which of the following are incorrectly matched?

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

Question 41

Acanthamoeba infections are usually transmitted via insects.

Question 42

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

Question 43

Inflammation of the thin clear membrane lining the eyelid and eye is properly termed

A) keratititis
B) trachoma
C) ophthalmia neonatorum
D) whitlow
E) conjunctivitis

Question 44

The varicella-zoster virus is the causative agent of chickenpox and shingles.

Question 45

Blue-green pus is characteristic of Pseudomonas wound infections.

Question 46

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

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

Question 47

Infection with Pediculus humanus is called scabies.

Question 48

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

Question 49

Which of the following is likely to spread MRSA among athletes?

A) physical contact
B) taping gels
C) shared equipment
D) whirlpool baths
E) All of the answers are correct.

Question 50

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

Question 51

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

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

Question 52

The normal flora of the skin is predominantly gram -negative rods.

Question 53

The abbreviation ʺGASʺ refers to pathogenic strains of Staphylococcus.

Question 54

Candidiasis often occurs following antibiotic therapy for bacterial infections.

Question 55

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

Question 56

Haemophilus influenzae is the most common bacterial cause of pinkeye.

Question 57

Which of the following is incorrectly matched?

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

Question 58

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.

Question 59

Which of the following pairs is mismatched?

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