Bacterial Skin Infections Flashcards
What is this and what causes it?
Impetigo
Commonly Staph aureus
What is impetigo and how is it described?
Very infections superficial skin infection by S.aureus.
Crusty, erythematous, papular rash usually on the face.
It can also form bullae
What is this and what causes it?
Folliculitis
S.aureus
What is this called, what is it and what causes it?
Furuncle - small abscess from sebaceuous glands or hair follicles
S.aureus
What is this called, what is it and what causes it?
Carbuncle
Large abscess formed from a collection of furuncles
S.aureus
What types of infection does S.aureus tend to cause?
Superficial
What types of infection does Strep pyogenes tend to cause?
Deeper
What is this called, what is it and what causes it?
Ecthyma
It is localised infection that spreads to the dermis
Strep.pyogenes
How do you treat superficial skin lesions such as impetigo, ecthyma, furuncles, carbuncles and folliculitis?
- Conservative - washing, moisturising
- Topical antibiotics eg FUSIDIC ACID
- Oral antibiotics - Flucox for strep, penicllin for staph
- Incision or drainage
What is this?
Erysipelas
What is this?
Cellulitis
What is erysipelas and cellulitis and what tends to cause them?
Thise are spreading infections of the skin:
Erysipelas - Dermis and upper cutaneous tissue
Cellulitis - Deeper cutaneous tissues
Strep pyogenes
How is erysipelas distinguished from cellulitis?
It is more defined
What are the symptoms of erysipleas and cellulitis?
Redness
Swelling
Pain
Heat
How are erysipelas and cellulitis managed?
Antibiotics
Leg elevation, analgesia and rest
What are some possible complications of cellulitis?
Localised necrosis
Bacteremia
Oedema
What is this?
Necrotising fasciitis
What is necrotising fasciitis and what are the symptoms/What does it look like?
Medical emergency which spreads rapidly causing:
Extreme pain
Shock
Crepitus due to air
DARK AND WOODY
What is the treatment for necrotising fasciitis?
IV antibiotics
?Amputation
What is this and what causes it and what is its appearence?
Staph scalded skin syndrome from exfoliative toxin
Large bullae and blistering
What are the symptoms of Staph scalded skin syndrome?
Pain
What is the management of Staph scalded skin syndrome?
Antibiotics, analgesia, emolients
What is this, how is it described and why does it happen?
Erythrasma
Macular hyperpigmentation due to stratum corneum thickening from infection
What is this, how is it described and why does it happen?
Pitted keratolysis due to bacterium destroying keratin in stratum corneum
What causes this rash and when does it appear?
Syphilis - t.pallidum
3-4 months after infection.
What rash appears first in syphillis?
Primary chancre. Ulcerated lesion that is PAINLESS AND NON BLEEDING
Usually on genitals
How do you treat syphillis?
Penicillin
What causes this type of rash and what is the rash called?
Erythema chronicum migrans (bullseye rash) - It grows and causes systemic symptoms like the flu
Lyme disease
What is this?
Lupus vulgaris caused by TB
Cutaeneous lesions on the face that are painful
What are these?
Commonly occur in people who have fish.
What causes them?
Fishtank granuloma from mycobaterium marinum
Red scaly plaques on hand
How do you know its erythema chronicum migrans and not erythema multiforme?
There is only ONE in erythema migrans
What antibiotic could be good for skin infections?
Fusidic acid
What is this?
Erythema toxicum neonatorum
Autoimmune - not infective
