Skin, Bone, Healthcare Infections Flashcards
most skin and soft tissue infections are caused by?
staph aureus
strep pyogenes
cellulitis is?
acute inflammatory process involving skin and soft tissues causing erythema, tenderness, warmth, swelling, lymphangitis
mostly lower limb
lymphangitis vs lymphadenitis
lymphangitis is inflammation of lymph tracks, red lines running up the legs
lymphadenitis is painful swollen nodes
risk factors for cellulitis
peripheral edema
lymph stasis
ulcers/wounds/trauma
dermatophytic infections (tinea)
mycobacterium marinum causes
fish tank granuloma
management of cellulitis
flucloxacillin
or cephalexin or cephazolin if allergic to penicillins
what is chronic venous insufficiency
disruption of the valves in veins which overwhelms the lymphatics.
get blood in the interstitial space that isnt cleared, breaks down leaving hemosiderin stains.
get swelling of legs
not as painful as cellulitis
how to differentiate acute contact dermatitis with cellulitis
usually have an exposure to irritant
and isnt as tender as cellulitis
differentials for cellulitis
septic arthritis septic bursitis contact dermatitis chronic lymphodema necrotising fasciitis pyomyositis DVT gout thrombophlebitis
markers for deeper infection (necrotising fasciitis/gas gangrene)
severe pain systemic toxicity (high HR, low BP) gas clinical deterioiration despite antibiotics skin necrosis bullae elevated CK (due to muscle destruction)
typical pathogen post-burn
pseudamonus aerigonosa
treatment for cellulitis (suspected staph or strep)
flucloxacillin or cephalexin if allergic
if strep pyogenes likely can use penicillin
treatment of severe cellulitis
IV fluclox 2g/6 hourly
or IV cephazolin if allergic
what is gout? what joint is most common? treat with?
urate crystal deposition in joints, usually metatarsophalyngeal
diagnosed by urate aspirate
treat with NSAIDS
what is thrombophlebitis
inflammation and thrombus within a vein