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Intersystem > W33/L4 > Flashcards

W33/L4 Flashcards

1
Q

Most skin micro biota is gram _____

A

Positive

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2
Q

Why is the skin resistant to infection? (6)

A 
Low water content
Low pH
Low temp
High salt
Fats & fatty acids
Microbiota
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3
Q

What are the 4 main causes of skin & soft tissue infections?

A

Staph aureus
Strep pyogenes
Clostridium perfringens
Pseudomonas

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4
Q

Define folliculitis

A

Infection of the hair follicle

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5
Q

What tends to predispose to folliculitis?

A

Some sort of blockage

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6
Q

What’s the most common cause of folliculitis?

A

Staph aureus

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7
Q

Coagulase + or -: Staph aureus

A

Positive

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8
Q

Coagulase + or -: Staph epidermidis

A

Negative

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9
Q

Coagulase + or -: Staph saprophyticus:

A

Negative

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10
Q

What 4 actions does staph aureus have that protect it from the immune system?

A

Strong adhesion to damage tissues
Inhibit chemotexis
Inhibit p’cytosis
Inhibit death by PMNs

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11
Q

Define impetigo

A

Infection of the epidermis

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12
Q

What are the two main causes of impetigo?

A

Staph. aureus

Strep. pyogenes (GAS)

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13
Q

What are the 3 types of impetigo?

A

Bullous
Crusted
Pustular

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14
Q

What microbe causes bullous impetigo?

A

Staph. aureus

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15
Q

We group skin infections into 3 types, what are they?

A

Localised
Spreading
Necrotising

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16
Q

What are the 2 localised infections?

A

Folliculitis

Abcess

17
Q

What are the 3 spreading infections?

A

Impetigo
Erysipelas
Cellulitis

18
Q

What’s the typical cause of erysipelas?

A

Strep. pyogenes

19
Q

Define erysipelas

A

Rapidly spreading erythematous infections with well-defined border + pain & fever

20
Q

Define cellulitis

A

A skin infection with subcutaneous fat involvement

21
Q

What family of bugs are the most common cause of gas gangrene?

A

Clostridiums

22
Q

What are some typical presentations of pseudomonas infections?

A

Diabetic foot ulcers

Burns

23
Q

What’s the scientific name for scabies?

A

Sarcoptes scabei

24
Q

In which people do we sometimes see a disseminated herpes virus, and what’s the name of this condition?

A

People with eczema

Eczema herpeticum

25
Q

What type of burn dressing is helpful in controlling pseudomonas infections?

A

Silver-impregnated

26
Q

What us mupirocin

A

An anti-staph topical

27
Q

What’s the recommended treatment for a mild impetigo?

A

Soap & water + mupirocin

Intersystem (23 decks)

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