Skin and Soft tissue Infections Flashcards
What is the common cause of impetigo?
Strep Pyo, Staph aureus
What is the common cause of Erysipelas?
Strep Pyo
What is the common cause of Folliculitis, furuncle?
Staph Aureus
What is the common cause of Cellulitis ?
Strep Pyo, Staph Aureus
What are the Primary Pyoderms?
Shallow to Deep
Impetigo Folliculitis Furuncles/Carbuncles Erysipelas Cellulitis Necrotizing cellulitis/fasciitis Chancriform/Chronic nodular lesions
What causes Hot tub folliculitis?
Treatment?
Pseudomonas
Spontaneous Resolution
What is the Treatment of Non-Purulent cellulitis (Superficial SSTI)
- first gen cephalosporin,
- anti staph penicillins
Risk for MRSA?
What is the common location of a carbuncle?
The back of the neck
What is the Treatment of Purulent Superficial SSTI
- Vanco IV,
- TMP-SMX,
- Clindamycin,
DRAINAGE is KEY
What are the causes of Necrotizing Cellulitis/Fasciitis?
Clostridium Perfringens
GAS (Strep Pyo)
Polymicrobial Nec Fasc
MRSA
What are the clinical features of Nec Fasc?
Severe, Constant pain Bullous Lesion Systemic Toxicity- Mental Status Gas in soft tissue Rapid Spread
What are the sources of Clostridial Infection?
Tissue Trauma
Bacteremic Spread
What are the causes of Chancriform/Chronic Nodular Lesions?
Sporothrix Mycobacterium B. Anthracis Francisella Other: Nocardia, leishmania
What are the most common causes of Septic Arthritis?
Staph aureus Most Common Staph Epi if prosthetic joint Strep A and B G- Bacteria Eiknella- Human bite Pasturella- Cat Bite
What are the clinical Features of Septic Arthritis?
Monoarticular 80-90%
Knee 50%
Fever in 60-80%
Focal Joint tenderness, inflamm, effusion, limited and painful motion
How is synovial Effusion Classified?
Normal: Clear, viscous 60k WBC
If a sexually active person has joint pain what is the probable cause?
Neisseria Gonnorhea
Do a Cervical swab and culture
What are the antibiotics used for Septic Arthritis?
N. Gonorrhea: 3G Ceph or Fluoro S. Aureus: Nafcillin, 1G Ceph or Vanco GAS: PCN or Ceph G- : Ceph, Fluoro, Carbapenem IV therapy for 2-4 weeks
What are the common causes of Contiguous Osteomyelitis?
Post-traumatic
Peripheral Neuropathy (step on)
Vascular insufficiency
Pressure Ulcers
How is Osteomyelitis Diagnosed?
Bone Probe*** Radiography Nuclear Med scan CT MRI*** PET Bone Biopsy*** Need to ID Microbe!!!
What is the most common cause of Puncture wound Osteomyelitis
Pseudomonas Aeruginosa
What is the Treatment of Acute Osteomyelitis?
Abtx
Surgical sampling
Debriedment
What is the Treatment of Chronic Osteomyelitis?
Surgical Debriedment
Antibiotics: Broad Spectrum
