8 Questions
Which bacteria commonly cause impetigo?
S. aureus
What is a defining characteristic of erysipelas?
It presents with well defined, spreading erythematous inflammation
What is the most common causative agent of folliculitis associated with areas of friction?
S. aureus
Which feature is NOT associated with impetigo?
Well defined erythematous inflammation
What typically weeps serous fluid among the listed infections?
Impetigo
Epidermal erosion with elevated margins is a characteristic of?
Impetigo
What causes folliculitis after exposure to swimming pools or hot tubs?
P. aeruginosa
Which population is primarily affected by erysipelas?
Children and the elderly
Study Notes
Skin Infections
Impetigo
- Characterized by fragile, pinhead-sized vesicles or pustules that rupture early, forming rapidly enlarging and spreading erosions with bright yellow crusts.
- Crusts have elevated margins and are attached in the center.
- Spreading infection limited to the epidermis presents as a bullous, crusted, or pustular eruption of the skin.
- Lesions may weep a serous fluid.
Erysipelas
- A contagious disease of skin and subcutaneous tissue, marked by redness and swelling accompanied by vesicular and bullous lesions.
- Almost always caused by group A streptococci.
- Typically occurs on the cheek.
- Seen primarily in children and the elderly.
- Characteristics: blocking of dermal lymphatics, presenting as a well-defined, spreading erythematous inflammation.
- Often accompanied by pain and fever.
Folliculitis
- A group of skin conditions in which there are inflamed hair follicles.
- Results in a tender red spot, often with a surface pustule.
- Can affect anywhere there are hairs, including the chest, back, arms, and legs.
- Usually caused by S. aureus.
- Often associated with areas of friction and sweat gland activity.
- Most frequently seen on the neck, face, and axillae.
- Infection with P. aeruginosa can occur after exposure to inadequately chlorinated water in swimming pools or hot tubs.
Learn about the characteristics and symptoms of Impetigo and Erysipelas, two types of skin infections. Understand the differences and similarities between these conditions.
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