Podcast
Questions and Answers
What is the primary cause of Cellulitis and Erysipelas?
What is the primary cause of Cellulitis and Erysipelas?
- Staphylococci
- Viral infections
- Fungi
- Streptococcus pyogenes (correct)
Which of the following is a characteristic of Erythema in Erysipelas?
Which of the following is a characteristic of Erythema in Erysipelas?
- Diffuse edge of the lesion
- Well-demarcated and raised edge of the lesion (correct)
- -vesicle formation
- Painful and tender lesions
What is the typical duration of untreated Impetigo?
What is the typical duration of untreated Impetigo?
- 1-2 weeks
- 4-6 weeks
- More than 6 weeks
- 2-4 weeks (correct)
Which type of Impetigo is associated with scarring?
Which type of Impetigo is associated with scarring?
What is the typical appearance of blisters in Bullous Impetigo?
What is the typical appearance of blisters in Bullous Impetigo?
What is the primary difference between Erysipelas and Cellulitis?
What is the primary difference between Erysipelas and Cellulitis?
What is a common complication of Erysipelas and Cellulitis?
What is a common complication of Erysipelas and Cellulitis?
Which of the following is a characteristic of Impetigo?
Which of the following is a characteristic of Impetigo?
Which of the following is NOT a characteristic of Cellulitis?
Which of the following is NOT a characteristic of Cellulitis?
What is the primary site of infection in Erysipelas?
What is the primary site of infection in Erysipelas?
Which type of Impetigo is characterized by a punched-out necrotic ulcer?
Which type of Impetigo is characterized by a punched-out necrotic ulcer?
What is the common feature of both Erysipelas and Cellulitis?
What is the common feature of both Erysipelas and Cellulitis?
Which of the following is a characteristic of Non bullous Impetigo?
Which of the following is a characteristic of Non bullous Impetigo?
What is the difference in the appearance of the edge of the lesion in Erysipelas and Cellulitis?
What is the difference in the appearance of the edge of the lesion in Erysipelas and Cellulitis?
What is the primary bacterium responsible for Cellulitis and Erysipelas?
What is the primary bacterium responsible for Cellulitis and Erysipelas?
Which of the following is a common site affected by Erysipelas and Cellulitis?
Which of the following is a common site affected by Erysipelas and Cellulitis?
What is the primary difference in the scarring pattern between Ecthyma and Bullous Impetigo?
What is the primary difference in the scarring pattern between Ecthyma and Bullous Impetigo?
What is the primary complication of Erysipelas and Cellulitis?
What is the primary complication of Erysipelas and Cellulitis?
Which type of Impetigo is characterized by small vesicles that evolve into flaccid transparent bullae?
Which type of Impetigo is characterized by small vesicles that evolve into flaccid transparent bullae?
Study Notes
Impetigo
- Impetigo is a contagious superficial pyogenic infection of the skin caused by staphylococci and streptococci
- Characterized by pustules and honey-coloured crusted erosions ("school sores")
- More common in children and occurs mostly during summer
- Three types of impetigo:
Non-Bullous Impetigo
- Starts as a pink macule that evolves into a vesicle or pustule and then into crusted erosions
- Untreated, it usually resolves within 2-4 weeks without scarring
Ecthyma
- Starts as non-bullous impetigo but develops into a punched-out necrotic ulcer
- Heals slowly, leaving a scar
Bullous Impetigo
- Presents with small vesicles that evolve into flaccid transparent bullae
- Heals without scarring
Cellulitis and Erysipelas
- Cellulitis is an infection of the subcutaneous tissue
- Erysipelas is more superficial, involving the dermis and upper subcutaneous tissue
- Cellulitis and erysipelas may overlap, with cellulitis extending superficially and erysipelas deeply
- Caused mainly by Streptococcus pyogenes
- Clinical features:
- Erythema, heat, swelling, and pain or tenderness
- In erysipelas, the edge of the lesion is well-demarcated and raised, but in cellulitis, it is diffuse
- Blistering and hemorrhage are more common in erysipelas
- Lymphangitis and lymphadenopathy are frequent
- Face and legs are the most frequent sites affected
- Unusual complications:
- Gangrene
- Metastatic abscesses
- Grave sepsis
Bacterial Skin Infections
- Bacterial skin infections are contagious and superficial, caused by staphylococci and streptococci.
- Characterized by pustules and honey-colored crusted erosions, often referred to as "school sores".
- More common in children, typically occurring during summer.
Types of Impetigo
- Non-bullous impetigo:
- Starts as a pink macule, evolving into a vesicle or pustule, and then into crusted erosions.
- Untreated, it resolves within 2-4 weeks without scarring.
- Ecthyma:
- Starts as non-bullous impetigo, but develops into a punched-out necrotic ulcer.
- Heals slowly, leaving a scar.
- Bullous impetigo:
- Presents with small vesicles that evolve into flaccid transparent bullae.
- Heals without scarring.
Cellulitis and Erysipelas
- Cellulitis: an infection of the subcutaneous tissue.
- Erysipelas: more superficial, involving the dermis and upper subcutaneous tissue.
- Both can overlap, with cellulitis extending superficially and erysipelas deeply.
- Caused mainly by Streptococcus pyogenes.
Clinical Features
- Erythema, heat, swelling, and pain or tenderness are constant features.
- Erysipelas: well-demarcated and raised lesion edges, whereas cellulitis has diffuse edges.
- Blistering and hemorrhage are more common in erysipelas.
- Lymphangitis and lymphadenopathy are frequent.
- Face and legs are the most frequently affected sites.
Complications
- Gangrene
- Metastatic abscesses
- Grave sepsis
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Description
A contagious skin infection caused by staphylococci and streptococci, characterized by pustules and honey-coloured crusted erosions. It's more common in children and occurs mostly during summer.
