Deck 33: Skin and Soft Tissue Infections

Question 1

Which of the following organisms is responsible for impetigo?

A) Staphylococcus epidermidis
B) Streptococcus pyogenes
C) Enterococcus faecalis
D) Streptococcus agalactiae

Answer 1

B

Question 2

What organism produces "rat bite fever?"

A) Streptobacillus moniliformis
B) Staphylococcus aureus
C) Borrelia burgdorferi
D) Chlamydia trachomatis

Answer 2

A

Question 3

A group of swim team members breaks out in a rash (folliculitis) the day after swimming at the pool. What organism is probably responsible for this outbreak?

A) Staphylococcus aureus
B) Enterococcus sp.
C) Escherichia coli
D) Pseudomonas aeruginosa

Answer 3

D

Question 4

What is the most well-known type of myonecrosis?

A) Tetanus
B) Necrotizing fasciitis
C) Gas gangrene
D) Ebola hemorrhage

Question 5

A common cause of eumycetoma:

A) Actinomyces sp.
B) Candida albicans
C) Madurella sp.
D) Fonsecaea sp.

Question 6

What is a circumscribed, hyperkeratotic, rough-textured, painless papule called?

A) Skin tick
B) Mole
C) Freckle
D) Wart

Question 7

The clinical syndrome of Rocky Mountain spotted fever can be confused with which of the following conditions?

A) Lyme disease
B) Meningococcemia
C) Smallpox
D) Allergic reactions

Question 8

What is a form of folliculitis in bearded men?

A) Sycosis barbae
B) Furuncle
C) Carbuncle
D) Impetigo

Question 9

What causes scarlet fever?

A) S. aureus
B) Endotoxin
C) Proteases
D) Erythrogenic toxin

Question 10

What happens in the later stages of toxic shock syndrome as a result of the production of toxic shock syndrome toxin-1?

A) Bruising
B) Disseminated intravascular coagulation
C) Desquamation
D) Bacteremia

Question 11

Besides antimicrobial therapy, how are most carbuncles treated?

A) Teabags to draw the bacterial toxins out
B) Moist heat, then cold compresses
C) Surgical drainage
D) Squeezing to express the pus and necrotic tissues

Question 12

What organism is known to cause severe necrotic cellulitis and primary sepsis?

A) Vibrio vulnificus
B) V. parahaemolyticus
C) Campylobacter spp.
D) Staphylococcus epidermidis

Question 13

What organism causes the Buruli ulcer?

A) Streptococcus agalactiae
B) Mycobacterium ulcerans
C) Mycobacterium leprae
D) Corynebacterium jejuni

Question 14

Purpura fulminans, a skin manifestation of disseminated intravascular coagulation, is associated with which condition?

A) Hepatitis
B) Meningococcemia
C) Encephalitis
D) Salmonella

Question 15

What is the best method of diagnosing scabies?

A) Culture
B) Enzyme immunoassay
C) Polymerase chain reaction
D) Skin scrapings

Question 16

What condition presents as a localized area of mildly painful erythema, warmth, and swelling of the skin with poorly demarcated margins?

A) Impetigo
B) Carbuncles
C) Furuncles
D) Cellulitis

Question 17

What condition causes the nail margin to become painful, red, warm, and swollen with pus?

A) Furuncle
B) Carbuncle
C) Erysipelas
D) Paronychia

Question 18

What is erysipelas?

A) Inflammation of hair follicle
B) A superficial form of cellulitis
C) A synonym for furuncle
D) A synonym for carbuncle

Question 19

What is the most common bacterium found on the skin?

A) Coagulase-negative staphylococci
B) Coagulase-negative streptococci
C) Escherichia coli
D) Pseudomonas aeruginosa

Question 20

Which of these is an abscess that extends more deeply into the subcutaneous tissue and may have multiple draining sites?

A) Furuncle
B) Carbuncle
C) Folliculitis
D) Impetigo

Question 21

What is thrush?

A) Tinea unguium
B) Tinea corporis
C) Dermatophytosis
D) Oral candidiasis

Question 22

What causes erythema infectiosum?

A) Parvovirus
B) Herpesvirus
C) Paramyxovirus
D) Togaviridae

Question 23

What causes rubeola?

A) Calicivirus
B) Herpesvirus
C) Paramyxovirus
D) Torovirus

Question 24

What is ringworm?

A) A parasitic skin infection
B) A bacterial skin infection
C) A fungal skin infection
D) A viral skin infection

Question 25

What causes rubella?

A) Calicivirus
B) Herpesvirus
C) Paramyxovirus
D) Togaviridae

Question 26

What disease results from a reactivation of the varicella-zoster virus that presents as vesicular eruption in a unilateral dermatomal distribution?

A) Shingles
B) Chicken pox
C) Infectious mononucleosis
D) Rubella

Question 27

In August, a 30-year-old man presents with an ulcer on his leg with swelling of the lymph nodes in the surrounding area. He reports taking numerous hikes in the woods behind is house hunting rabbits. He does not recall any animal bites. What disease should be considered in the differential diagnosis?

A) Lyme disease
B) Tularemia
C) Brucellosis
D) Rat bit fever

Question 28

What is herpetic whitlow?

A) Primary herpetic lesions of the genitals
B) Primary herpetic lesions of the finger
C) Primary herpetic lesions of the anus
D) Primary herpetic lesions of the lip

Question 29

All of the following viruses cause a characteristic viral syndrome, which includes severe bleeding manifestations, except

A) Ebola virus.
B) Rabies virus.
C) Junin virus.
D) Marburg virus.

Question 30

What is swimmer's itch?

A) Cercariae larvae penetrate human skin, causing dermatitis.
B) Arthropods deposit larvae in human skin, causing dermatitis.
C) Dermatitis is caused by Vibrio spp.
D) Dermatitis is caused by Pseudomonas spp.