4. cellulitis Flashcards
what is cellulitis?
severe inflammation of dermal and subcutaneous layers of the skin
common causes of cellulitis?
staphylococcus aureus
streptococcus pyogenes
(staphylococcus epidermis)
risk factors for cellulitis?
wounds to skin diabetes old age insect bites obesity skin condition immunosuppression
symptoms of cellulitis?
erythema warmth tenderness swelling pain systemic effects - fever nausea rigorous
what are the signs of acute inflammation that can be seen in cellulitis ?
rubor
tumor
calor
dolor
mechanism of infection of cellulitis?
not spread for person to person
skin commensal penetrate dermis and subcutaneous tissue via breach in skin
gram stain of staphylococcus aureus?
gram positive
cocci
clusters
characteristics of staph aureus?
part of skin and mucous membrane flora
coagulase positive
catalase positive
clinical significance of staph aureus?
superficial skin abscesses, Cellulitis, CAP, Sepsis MRSA
investigations of staph aureus?
gram stain
coagulase - distinguish from coagulase negative staph epidermis
catalase- distinguish from catalase negative strep
nose swab for MRSA
treatment for staph aureus for cellulitis and MRSA
cellulitis = flucloxacilin MRSA = vancomycin
both cell wall synthesis inhibitors
gram stain of streptococcus pyogenes
gram positive
cocci
chains
characteristic of strep pyogenes
group A, B haemolytic
treatment for strep pyogenes cellulitis?
flucoxacilin
