Deck 21: Microbial Diseases of the Skin and Eyes

Question 1

Which of the following leads to all the others?

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

Answer 1

B

Question 2

Which of the following are incorrectly matched?

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

Answer 2

B

Question 3

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

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.

Answer 3

E

Question 4

Which of the following is used to treat herpetic keratitis?

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

Question 5

A possible complication of chickenpox is

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

Question 6

Which of the following statements about Reye syndrome is FALSE?

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

Question 7

Which of the following is used to treat shingles?

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

Question 8

Thrush and vaginitis are caused by

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

Question 9

Which of the following is a subcutaneous mycosis?

A) athlete's foot.
B) Buruli ulcer.
C) tinea capitis.
D) sporotrichosis.
E) erysipelas.

Question 10

Which of the following is incorrectly matched?

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

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

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

Question 13

The eradication of smallpox was possible because

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 14

Newborns' eyes are treated with an antibiotic

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 15

Scabies is transmitted by

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

Question 16

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

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

Question 17

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

Question 18

All of the following are transmitted via the respiratory route EXCEPT

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

Question 19

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 20

All of the following are causative agents of conjunctivitis EXCEPT

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

Question 21

Koplik spots are a diagnostic indicator of

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

Question 22

Which of the following is NOT true of acne?

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

Question 23

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

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

Question 24

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

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

Question 25

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

Question 26

Staphylococcus aureus is responsible for all of the following EXCEPT

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

Question 27

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

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

Question 28

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

Question 29

Which region of the skin supports the largest bacterial population?

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

Question 30

Warts are caused by

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

Question 31

Buruli ulcer is caused by

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

Question 32

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

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

Question 33

All of the following are normal microbiota of the skin EXCEPT

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

Question 34

Which of the following is used to treat sporotrichosis?

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

Question 35

Exfoliative toxin is responsible for

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

Question 36

Which of the following cause(s) ringworm?

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

Question 37

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

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

Question 38

Why is vaccination for rubella recommended?

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 39

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

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 40

The greatest single cause of blindness in the world is

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

Question 41

Which of the following pairs is mismatched?

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

Question 42

Infection with Pediculus humanus is called scabies.

Question 43

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 44

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

Question 45

Candidiasis often occurs following antibiotic therapy for bacterial infections.

Question 46

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

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

Question 47

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) Staphylococcus aureus.
D) Candida albicans.
E) varicella- zoster virus.

Question 48

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

Question 49

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

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

Question 50

Acanthamoeba infections are usually transmitted via insects.

Question 51

Haemophilus influenzae is the most common bacterial cause of pinkeye.

Question 52

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

Question 53

Blue- green pus is characteristic of Pseudomonas wound infections.

Question 54

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

Question 55

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

Question 56

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

Question 57

Scabies is a skin disease caused by a

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