Skin Infections

Question 1

What is Erysipelas?

Answer 1

Localised skin infection caused by S. progenies - superficial limited cellulitis.

Question 2

Management of Erysipelas.

Answer 2

Flucloxacillin.

Question 3

What is Impetigo?

Answer 3

Superficial bacterial skin infection caused by either S. aureus or S. pyogenes.

Question 4

Risk Factors of Impetigo.

Answer 4

1. Existing Skin-Condition e.g. Eczema.
2. Scabies.
3. Insect Bites.
4. Children (Warm Weather).

Question 5

Clinical Features of Impetigo.

Answer 5

1. On Uncovered Surfaces.

2. Golden Crusted Skin Lesions - Perioral.

Question 6

Transmission of Impetigo.

Answer 6

1. Discharge from Scabs of Infected Person.
2. Invade Skin through minor abrasions.
3. Incubation Period : 4-10 Days.

Question 7

Types of Impetigo (2B).

Answer 7

1. Non-Bullous Impetigo.
2. Bullous Impetigo (commoner in kids and neonates with systemic symptoms.
   2B. Widespread 2 is Staphylococcus Scalded Skin Syndrome.

Question 8

Management of Non-Bullous Impetigo (3).

Answer 8

EXCLUDE FROM SCHOOL UNTIL CRUSTED AND HEALED OR 48 HOURS AFTER ANTIBIOTICS.

Localised :

1. Antiseptic Cream (Hydrogen Peroxide 1%).
2. Topical Fusidic Acid (or Topical Mupirocin if MRSA).

Severe/Spread :
3. Oral Flucloxacillin.

Question 9

Management of Bullous Impetigo (2).

Answer 9

EXCLUDE FROM SCHOOL UNTIL CRUSTED AND HEALED OR 48 HOURS AFTER ANTIBIOTICS.

1. Diagnose with Swabs from Vesicles - MC&S.
2. Antibiotics - Flucloxacillin.

Question 10

Pathophysiology of Bullous Impetigo (5).

Answer 10

1. S.aureus produces epidermolytic toxins.
2. Toxins break down proteins that hold skin cells together.
3. Fluid-filled vesicles form on the skin.
4. Grow in size and burst to form a golden crust.
5. Heal without scarring.
6. Itchy and painful.

Question 11

Pathophysiology of Non-Bullous Impetigo.

Answer 11

Exudate from Lesion forms golden Crust.

Question 12

Fungal Infections of Skin.

Answer 12

1. Tinea/Dermatophytosis (Ringworm - Tricophyton).

Question 13

Viral Infections of Skin.

Answer 13

1. Hand, Foot and Mouth (Coxsackie A Virus).
2. Chickenpox (Varicella Zoster Virus).
3. Molluscum Contagious (Poxvirus).
4. Measles (Paramyxovirus).

Question 14

Parasitic Infections of Skin.

Answer 14

1. Head Lice (Pedicures Humanus Capitis).

2. Scabies (Sarcoptes Scabies Tiny Mites).

Question 15

Bacterial Infections of Skin.

Answer 15

1. Cellulitis (S. pyogenes or S. aureus).

2. Impetigo (S. pyogenes or S. aureus).