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Clinical Microbiology 2 > 2. Skin, Soft Tissue, and Wound Infections > Flashcards

2. Skin, Soft Tissue, and Wound Infections Flashcards

(58 cards)

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1
Q

Cause of swimmer’s itch?

A

Parasitic skin infection by cercariae (burrows into skin)

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2
Q

Source of M. ulcerans

A

Tropical wetlands (swamps)

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3
Q

Necrotizing fasciitis agents

A
  • S. pyogenes
  • S. aureus
  • Anaerobes
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4
Q

Pyoderma that may be caused by Aeromonas (fresh water) or Vibrio (sea water)

A

Cellulitis

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5
Q

Begin as painless papules which become hemorrhagic vesicles that may become necrotic

A

Anthrax

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6
Q

Causes syphilis

A

Treponema pallidum

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7
Q

5 uncommon bacterial infections of the skin

A
  • Mycetoma
  • Chromoblastomycosis
  • Phaeohyphomycosis
  • Mucormycosis
  • Lobomycosis
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8
Q

Skin infection due to HSV I? HSV II?

A

I - cold sores

II - genital herpes

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9
Q

Osler nodes and Janeway lesions are indicative of …?

A

Endocarditis

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10
Q

Fungal media should be added to all ________ specimens

A

burn

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11
Q

Erythrasma

A
  • Brown, scaly skin patches
  • Groin, inner thighs, armpits, toe webs
  • Usually in men, obese, diabetics

Corynebacterium minutissimum

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12
Q

Pyoderma common caused by Grp A strep; S. aureus more rare

A

Erysipelas

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13
Q

usually a progression of untreated impetigo

infection penetrates the dermis; painful sores at first, then deeper ulcers form

A

ecthyma

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14
Q

Tinea versicolour

A

Diffuse distribution of hypopigmented macules

Malassezia furfur (yeast)

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15
Q

Intertrigo

A

Infectious dermatitis common in skin folds of infants and obese adults

Candida albicans

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16
Q

2 infections in which Wood’s lamp is useful

A

Erythrasma - lesions fluoresce coral red

Dermatophyte infections - Microsporum fluoresces yellow-green

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17
Q

The only organisms that can grow using keratin

A

dermatophyte fungi

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18
Q

Treatment for this infection could be local hyperthermia (42-43 degC)

A

Sporotrichosis

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19
Q

“Swimming pool granuloma”

A

Mycobacterium marinum

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20
Q

Itraconazole (1st line drug) is for what infection?

A

Sporotrichosis

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21
Q

Pyoderma caused by Erysipelothrix rhusiopathiae

A

Erysipeloid

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22
Q

TSI is often used to screen for this infection (causes H2S+)

A

Erysipeloid

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23
Q

Difference between TSS and scalded skin syndrome effect on skin layers?

A

TSS = necrosis of FULL epidermal layer

SSS = only top layers shed

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24
Q

German measles AKA ______ is caused by ________

Study These Flashcards
A

rubella

Rubivirus

25
Viral infection that is caused by HPV
Warts
26
2 animal bite related organisms that show the same plate growth and only differ in 1 chemical test. Which 2 organisms and which test?
Pasteurella multocida, Bergeyella zoohelcum Urea (P. multocida is NEG)
27
Myonecrosis agents
AKA gas gangrene when caused by C. perfringens, other Clostridium Also: Anaerobic strrep, Enterobacteriaceae
28
Sulphur granules discharge is common in this infection
Actinomycosis
29
Causative agent in non-bullous impetigo? Bullous imepetigo?
Non-bullous - Grp A strep Bullous - S. aureus
30
English measles AKA __________ is caused by ________
rubeola Morbillivirus
31
Treatment for uncommon bacterial skin infections?
Surgical debridement
32
Small painful nodules on pads of fingers and toes due to immune complexes deposited in soft tissue
Osler nodes
33
How to differentiate S. intermedius from S. aureus?
S. intermedius is PYR+
34
4 types of infectious dermatitis
Intertrigo Erythrasma Dermatophytosis Tinea versicolour
35
Myositis agents
S. aureus, almost anything
36
Uncommon bacterial skin infection that possibly involves bone
Mycetoma
37
Toxin that causes scarlet fever? Causative agent?
Erythrogenic toxin. GAS.
38
Acid-fast stains and culture are required for these infections
Mycobacterial infections
39
Skin manifestation caused by S. aureus exfoliative toxins (pyrogenic)
Scalded skin syndrome
40
Transmitted by body lice (organism + infection)
Bartonella quintana | Trench fever
41
Term used to denote a dermatophyte infection
tinea
42
Infection of nail cuticle
Paronychia
43
Special media set up for this type of infection includes: PDA, Mycosel, IMA, SAB, 10% KOH direct exam
Dermatophyte
44
Impetigo
- Itchy - scratching spreads it - Disease of childhood Schools, daycares (crowded conditions) GAS (non-bullous) S. aureus (bullous)
45
Borrelia burgdoferi
Lyme disease bull's eye lesion
46
Small hemorrhagic spots that don't blanch; usually caused by bacterial infections
Petechiae
47
Bartonella henselae culture requirements and s/?
CHOC, BAP high humidity and CO2 helpful gnb, occasionally curved
48
- Tricophyton - Microsporum - Epidermophyton can all cause?
Dermatophytosis
49
SXT (choice) also Imipenem, amikacin may be used to treat?
Nocardiosis
50
2 Mycobacterium where the source can be soil
M. foruitum M. chelonae
51
Animal bite related, long fusiform gnb that exhibits gliding motility
Capnocytophaga canimorsus
52
Painless hemorrhagic macules on palms and soles
Janeway lesions
53
Specimens required for dermatophyte infection?
Dry skin scraping | Hair or nail clippings
54
Purpose of KOH in wet prep direct microscope examination of skin scrapings
Clears tissues => easier to see fungal elements
55
Specimens collected for Bartonella henselae infection?
Lesion biopsies, blood cultures
56
Ecthyma gangrenosum (EG) is associated with what bacteria?
Pseudomonas Also S. aureus, Candida
57
Antifungal amphotericin B is used to treat..?
Mucormycosis
58
Streptobacullus moniliformis is the causative agent of?
Rat bites

Clinical Microbiology 2 (14 decks)

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