Lecture 5 Skin Infections and Infestations Flashcards
What aerobic cocci live on our skin
- Staphylococcus epidermidis
* Staphylococcus aureus
What other aerobic and anaerobic bacteria live on the skin
- Corynebacterium
* Propionbacterium
What yeasts live on the skin
Malassezia furfur
Signs of infection
Tender Hot Erythema Pus Exudate Fever
What is Impetigo
Superficial skin infection
Most common bacterial skin infections
Clinical features of Impetigo
Bullous
Golden crust
Can spread
What are the causes of Impetigo
– Staphylococcus aureus, Streptococcus pyogenes
What is the treatment for Impetigo if localised
Fusidic acid cream (5 days) Mupirocin cream (5 days)
What is the treatment for Impetigo is if is widespread
Flucloxacillin oral (7 days) Erythromycin oral (7 days)
Clinical features of Oedema blisters
- Acute exacerbation of oedema
- Dorsum of feet
- Often erythematous
- Can feel hot
Treatment for Lipodermatosclerosis
- treat underlying venous disease
* topical steroids
Name types of fungal infections
- Tinea
* Candidiasis
What is the causative agent of Tinea
Infection by dermatophyte
If Tinea is on the body what is it called
Tinea corporals
Ringworm
if Tinea is on the scalp what is it called
Tinea capitis
If tinea is on the foot what is called
Tinea pedis (athletes foot)
Where does Tinea Curtis affect
The groin
Whats the treatment for tinea infection
- Terbinafine or clotrimazole cream
- Tinea infection of scalp or nails requires oral antifungals
- Check and treat other family members
How are skin scrapings processed
- Inoculated onto primary isolation media
- Sabouraud’s dextrose agar containing cycloheximide
- Incubated at 26-28C for 4 weeks
Clinical feature of candida infection
Satellite regions
Treatment for candida infection
Nystatin, Miconazole, Ketoconazole cream
Precautions for wart infections
Cover wart with waterproof plaster
Low transmission risk
Treatment for HPV warts
Not necessary
Paints and Cryotherapy may stimulate immune system
Warts will go away when patient develops immunity to the
What is Molluscum Contagiosum
DNA pox virus that causes umbilicate papule
Treatment of Molluscum Contagiosum
5% Potassium hydroxide
Induced inflammation and body recognises virus and clears it
Causative agent of Scabies
Sarcoptes Scabei
Clinical Features of scabies
Burrows
Crusted scabies
Mites
Thick white crust
Diagnosis of scabies
Histology
Microscopy
Treatment of scabies
Permethrin cream top to toe for 8 hours
• Two applications 1 week apart
