Bacterial Infections Flashcards
Superficial infections of the epidermis
Usually begins in/near the nose – where it colonizes, likes to live in nose and with skin breakdown it ca infiltrate and infect
Crusted erosions or ulcers (Ecthyma)
Primary infections more common in children
Impetigo
What is the most common agent in Impetigo?
S. aureus
Small erosions with honey-golden crusting
1-3cm lesions
Central healing often apparent if lesions are present for several weeks
Scattered, discrete lesions
Lesions may become confluent without treatment
Impetigo
Skin lesions:
Vesicles and bullae containing clear yellow or slightly turbid fluid with or without surrounding erythema
Decompress with rupture, shallow moist erosion forms
More common in intertriginous sites
Bullous Impetigo
What is the organism responsible for Bullous Impetigo?
Epidermolytic toxin A-gene S. aureus
Bullous Impetigo is also known as what?
Staphylococcal scalded-skin syndrome
What is the treatment for Impetigo?
Mupirocin ointment - BID to involved skin and nares for 7-10 days
Occasionally systemic antibiotics - Pen G or V, Dicloxacillin, Cephalosporins, Bactrim
Daily bathing/good hygiene
superificial
Inflammation of the connective/subcutaneous tissues
Face and lower legs most common
Lesions - Hard to palpation, Extremely painful
Cellulitis
Superficial cutaneous cellulitis skin infection with marked dermal lymphatic involvement
Acute strep (GAS) skin infection extending into underlying fat tissue, affects lymphatics
Favors the extremities but can include face
Lesions - Painful, Bright red, Raised, Edematous, Indurated plaque with red borders, Sharply marginated
Erysipelas
What are the most common organisms in cellulitis in adults?
Staph
GAS
What is the most common organism in Erysipelas?
GAS
What are the most common organisms in cellulitis in children?
H. influenzae type B
GAS
S. aureus
What is the clinical presentation of Erysipelas?
High fevers (>38.5)
Shaking/chills
Fatigue
Headache
Vomiting within 48 hours
Skin lesions enlarge rapidly, sharply demarcated
What is the treatment of Cellulitis/Erysipelas?
Supportive
Antibiotics
surgery
Superficial inflammation of hair follicle due to infections by either physical or chemical irritation
Folliculitis
