Skip to Main Content

  • Superficial pyoderma
  • Streptococcal impetigo
  • Impetigo contagiosa

  • 041.01 Streptococcus infection in conditions classified elsewhere and of unspecified site, Streptococcus, group A

  • B95.0 Streptococcus, group A, as the cause of diseases classified elsewhere


  • Streptococcus pyogenes (group A Streptococcus) is responsible for infections in the skin
  • Highly infectious skin rash, spreads rapidly
  • It occurs most often in tropical climates or during the summer months in non-tropical climates
  • With this infection, the patient is usually afebrile and has no pain.
  • Lesions are most often on the face and extremities and may become a mild but chronic illness if untreated
  • Most common in children, particularly those in unhealthy living conditions
  • In adults, it may follow other skin disorders or a recent upper respiratory infection, such as a cold or other virus
  • Preceding a streptococcal respiratory infection

Essentials of Diagnosis

  • Diagnosis is usually made by considering medical history and signs and symptoms, including the distinctive sores
  • A culture may be used to confirm the diagnosis or to rule out another cause

General Considerations

  • Highly contagious and can be spread through close contact or sharing items
  • Scratching can spread the sores to other parts of the body
  • It can be difficult to distinguish clinically between skin infection caused by streptococci and other bacteria such as Staphylococcus


  • Highest prevalence in children 2 to 5 years of age
  • Can be seen in adults, but is more prevalent in children

Signs and Symptoms

  • Impetigo
  • Erysipelas
  • Rash
  • Blisters filled with pus
  • Fever
  • Malaise
  • Vomiting: childhood type
  • Itching blister
  • Erythematous denuded areas
  • Honey-colored crusts
  • Localized area of redness
  • Purulent vesicles covered with a thick, confluent, honey-colored fluid
  • Swollen lymph nodes near the infection
  • Lesions most often on face, lips, arms, and legs

Functional Implications

  • Very contagious, limiting contact and social status

Possible Contributing Causes

  • Skin lesions
  • Circulation impairment
  • Pain
  • Edema
  • Contact with someone with the skin infection

Differential Diagnosis

  • Tinea
  • Herpetic impetigo
  • Pemphigus vulgaris
  • Pemphigus foliaceus
  • Folliculitis
  • Pseudomonas folliculitis
  • Follicular mucinosis
  • Erysipelas
  • Lymphadenitis
  • Lymphadenopathy
  • S. aureus infection
  • Insect bites

Laboratory Tests

  • Culture of the skin or lesion
  • Blood cultures: leukocytosis tests


  • Allergist/immunologist
  • Dermatologist

  • Skin integrity
  • Circulation
  • Pain
  • Sensation
  • Joint ROM
  • Muscle strength
  • Functional mobility
  • Self-care
  • Home management

  • Integumentary integrity
    • Pigmentation
    • Shape and size of skin involvement
    • Presence of rash, fungi, blistering, ecchymosis, hair growth, signs of infection
    • Skin temperature
    • Tissue ...

Pop-up div Successfully Displayed

This div only appears when the trigger link is hovered over. Otherwise it is hidden from view.