Deck 74: Skin soft Tissue and Wound Infections

Question 1

If a Wood's lamp examination of skin lesions reveals a golden-yellow fluorescence,then what superficial mycoses are expected?

A)Malassezia furfur
B)Trichosporon spp.
C)Candida albicans
D)Cryptococcus neoformans

Answer 1

A
M.furfur causes a skin infection called tinea versicolor,which may exhibit golden-yellow fluorescence under a Wood's lamp.

Question 2

The causative agents of lumpy jaw are:

A)Clostridium spp.
B)Bacteroides spp.
C)Prevotella spp.
D)Actinomyces spp.

Answer 2

D
Actinomyces spp.are the causative agents of lumpy jaw.

Question 3

A patient is diagnosed with gas gangrene in the skin as a result of bullous lesions associated with sepsis.The Gram-stain reaction and morphologic features of the most probable pathogen causing this infection is:

A)gram-positive cocci.
B)gram-positive bacilli.
C)gram-negative coccobacilli.
D)gram-negative bacilli.

Answer 3

B
The organism that causes gas gangrene is Clostridium perfringens,which is a gram-positive bacillus.

Question 4

MATCHING
Match the condition with its definition.
a.Extensive necrosis of muscle caused by infectious agents
b.Infection of the fascia overlying muscle groups,often with the involvement of the overlying soft tissue
c.Slowly progressive infection of the subcutaneous tissue with associated ulceration of portions of the overlying skin
d.Chronic gangrenous condition of the skin most often encountered as a postoperative complication,particularly after abdominal or thoracic surgery
Progressive bacterial synergistic gangrene

Question 5

A 6-year-old girl is diagnosed with a bullous impetigo infection.Based on this information,the catalase and coagulase results of the infecting organism are expected to be catalase-_____ and coagulase-_____.

A)negative;negative
B)positive;negative
C)positive;positive
D)negative;positive

Question 6

MATCHING
Match the condition with its definition.
a.Extensive necrosis of muscle caused by infectious agents
b.Infection of the fascia overlying muscle groups,often with the involvement of the overlying soft tissue
c.Slowly progressive infection of the subcutaneous tissue with associated ulceration of portions of the overlying skin
d.Chronic gangrenous condition of the skin most often encountered as a postoperative complication,particularly after abdominal or thoracic surgery
Meleney ulcer

Question 7

MATCHING
Match the condition with its definition.
a.Extensive necrosis of muscle caused by infectious agents
b.Infection of the fascia overlying muscle groups,often with the involvement of the overlying soft tissue
c.Slowly progressive infection of the subcutaneous tissue with associated ulceration of portions of the overlying skin
d.Chronic gangrenous condition of the skin most often encountered as a postoperative complication,particularly after abdominal or thoracic surgery
Myositis

Question 8

An abscess that begins as a red nodule in a hair follicle that ultimately becomes painful and full of pus is a:

A)folliculitis.
B)furuncle.
C)carbuncle.
D)erythrasma.

Question 9

An abnormal passage between two organs or leading from an internal organ to the body surface is known as a:

A)fistula.
B)sinus tract.
C)necrotizing fascia.
D)decubitus.

Question 10

A 36-year-old man enters the emergency department with lesions that are painful,red,swollen,and indurated.He is febrile and exhibiting regional lymphadenopathy (swollen glands).The lesions are marked and well demarcated with a raised border.Which organism is most likely responsible for causing this infection?

A)Streptococcus pyogenes
B)P.aeruginosa
C)Microsporum spp.
D)Bacteroides fragilis group

Question 11

MATCHING
Match the condition with its definition.
a.Extensive necrosis of muscle caused by infectious agents
b.Infection of the fascia overlying muscle groups,often with the involvement of the overlying soft tissue
c.Slowly progressive infection of the subcutaneous tissue with associated ulceration of portions of the overlying skin
d.Chronic gangrenous condition of the skin most often encountered as a postoperative complication,particularly after abdominal or thoracic surgery
Necrotizing fasciitis

Question 12

Folliculitis,furuncles,and carbuncles are localized abscesses either in or around hair follicles.Which organism is the most common etiologic agent for all three infections?

A)Pseudomonas aeruginosa
B)Staphylococcus epidermidis
C)Escherichia coli
D)Staphylococcus aureus

Question 13

The most predominant anaerobe isolated in animal bites is:

A)Veillonella spp.
B)Clostridium spp.
C)Prevotella spp.
D)Fusobacterium spp.