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Micro Exam 6 > 69 > Flashcards

69 Flashcards

1
Q

Normal Flora of Skin (3)

A 
E. coli (-)
Mycococcus luteus (+)
Staphylococcus epidermis (+)
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2
Q

Skin Diseases in Epidermis

A

Folliciiulitis
Impetigo
Acne
SSSS-TSS

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3
Q

Skin Diseases in Dermis

A

Carbuncles
Furuncles
Ecthyma

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4
Q

Skin Diseases in Sub Q Tissue

A 
Carbuncles
Furuncles
Cellulitis
Erysipelas
Necrotizing Fasciitis
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5
Q

Skin Diseases in Muscle

A

Myonecrosis

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6
Q

Causative agent of acne vulgaris (gram, shape, O2 req.)

A 
Propionibacterium acnes
(+)
pleomorphic
NF
Areotolerant
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7
Q

Causative agent of folliculitis & type each causes

A

S. aureus (folliculitis barbae, Sty)

P. aeruginosa (systemic - hot tub)

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8
Q

Proteins/Virulence Factors of S. aureus (5)

A 
Hemolysin
Coagulase
Leukocidin
Protein A
MSCRAMMs (fibronectin binding protein & clumping fact)
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9
Q

Toxins Produced by S. aureus

A

Exfoliatin A & B
-causes outer layer of skin to slough off
Pyrogenic (TSST-1)

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10
Q

S. aureus Characters

A

(+)
NF (axilla, nares, groin)
catalase (+)
B-hemolytic

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11
Q

P. aeruginosa Characters

A

(-)
opportunistic
Pyocyanin & pyoverdin

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12
Q

Another term or furuncle

A

Boil

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13
Q

Causative Agent of Furuncle

A

S. aureus

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14
Q

Where to furuncles develop?

A

Where hair follicles are exposed to friction and perspiration

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15
Q

Skin level(s) of furuncle?

A

Dermis & Sub Q (abscess)

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16
Q

What is a carbuncle?

A

Aggregate of connected furuncles

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17
Q

Causitive agent of carbuncle?

A

S. aureus

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18
Q

Treatment of furuncles & carbuncles

A

warm compress, drain, AB

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19
Q

Varients of pyoderma?

A

Impetigo (bullous and non-bullous)

Ecthyma

20
Q

What is pyoderma?

A

Bacterial skin inflammation marked by pus filled lesions

-dermis & epidermis

21
Q

Causative agents of non-bullous impetigo

A

S. aureus (most common)

GAS (ex. S. pyogenes)

22
Q

Virulance Factors of GABHS (S. pyogenes)

A 
Streptococcal Pyrogenic Exotoxins
-superantigens that cause rash
M protein
-creates sequelae (rheumatic fever, glomerulonephritis)
DNAase
Hyaluronidase
Streptokinase (dissolbes blood clots)
23
Q

Clinical Manifestations of Nonbullous Impetigo

A

Intraepidermal lesions

Erythematous macule to vesicle to rupture to yellow crust exudate

24
Q

Spread of nonbullous impetigo

A

Very infectious, spreads rapidly, bacteria in vesicle, trx to decrease spread

25
Q

Causative agent of bullous impetigo

A

S. aureus

26
Q

Clinical Manifestations of bullous Impetigo

A

Begins as vesicle, enlarge to form bullae clear/yellow fluid, become turbid, rupture and brown crust forms

27
Q

Population and area of body with nonbullous impetigo

A

2-6yo

Face, arm, legs

28
Q

Population and area of body with bullous impetigo

A

2-6yo

face, legs

29
Q

Caustive Agent of Ecthyma

A

GAS

30
Q

Clinical Manifestations of Ecthyma

A

Ulceraters c green/yellow crust, raised margins

Dermis

31
Q

Is ecthyma contagious?

A

Rarely

32
Q

Population and area of body with Ecthyma

A 
Children, DM, neglected elderly
Lower extremities (most common)
33
Q

TRX of impetigo & ecthyma

A

Inc. hygiene
Debride
Topical & oral AB

34
Q

Population with cellulits

A

middle age & older adults

35
Q

Population with erysipelas

A

young children & older adults

36
Q

Most common causitive agent of Cellulits

A

GABHS

37
Q

Causative agents of Cellulits

A

GABHS + (associated c skin lesions - ex: varicella)
S. aureus + (does NOT spread as fast as others & assoc. c local abscess)
Acinetobacter baumanii - (associated c trauma & invasive devices)
Pasteurella multocida - (associated c dog/cat bite & purulent drainage)
Aeromonas hydrophila - (associated c freshwater contamination of wound)
Vibrio vulnificans - (associated c saltwater contamination of wound)

38
Q

Hallmark S&S of Cellulits

A

HEET

Heat, erythema, edema, tenderness

39
Q

Layer of Skin Involved in Cellulits

A

DEEP dermis & Sub Q

40
Q

What should you avoid in cellulitis trx?

A

NSAIDs (mask indicators of worsening disease)

41
Q

Trx of Cellulits

A

Elevate, immobilize, keep skin moist, AB (oral)

42
Q

What is erysipelas?

A

Special form of cellulitis that is caused mainly by GAS and rarely by S. aureus.
Found in UPPER dermis & superficial lymphatics(as compared to DEEP of cellulitis)

43
Q

S&S of Erysipelas

A

Raised lesions with clear lines of demarcation.
Milian’s ear sign (distingguishing feature)
Const. symptoms

44
Q

Anatomical regions of erysipelas

A

Lower extremities & butterfly rash common

45
Q

Trx of erysipelas

A

elevate, immobilize, keep skin moist, AB (parenteral)

Micro Exam 6 (9 decks)

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