4. cellulitis Flashcards

1
Q

what is cellulitis?

A

severe inflammation of dermal and subcutaneous layers of the skin

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2
Q

common causes of cellulitis?

A

staphylococcus aureus
streptococcus pyogenes
(staphylococcus epidermis)

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3
Q

risk factors for cellulitis?

A
wounds to skin
diabetes
old age
insect bites
obesity 
skin condition
immunosuppression
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4
Q

symptoms of cellulitis?

A
erythema 
warmth
tenderness
swelling
pain
systemic effects - fever nausea rigorous
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5
Q

what are the signs of acute inflammation that can be seen in cellulitis ?

A

rubor
tumor
calor
dolor

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6
Q

mechanism of infection of cellulitis?

A

not spread for person to person

skin commensal penetrate dermis and subcutaneous tissue via breach in skin

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7
Q

gram stain of staphylococcus aureus?

A

gram positive
cocci
clusters

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8
Q

characteristics of staph aureus?

A

part of skin and mucous membrane flora
coagulase positive
catalase positive

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9
Q

clinical significance of staph aureus?

A

superficial skin abscesses, Cellulitis, CAP, Sepsis MRSA

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10
Q

investigations of staph aureus?

A

gram stain
coagulase - distinguish from coagulase negative staph epidermis
catalase- distinguish from catalase negative strep
nose swab for MRSA

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11
Q

treatment for staph aureus for cellulitis and MRSA

A
cellulitis = flucloxacilin 
MRSA = vancomycin 

both cell wall synthesis inhibitors

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12
Q

gram stain of streptococcus pyogenes

A

gram positive
cocci
chains

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13
Q

characteristic of strep pyogenes

A

group A, B haemolytic

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14
Q

treatment for strep pyogenes cellulitis?

A

flucoxacilin

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