Perianal streptococcal dermatitis


Dermatitis Types

Clinical Features

Well-demarcated salmon-pink to erythematous plaque with overlying scale and pustules on the right side of the groin.
Perianal streptococcal dermatitis.png

On physical exam[1]:

  • Bright red, sharply demarcated, perianal rash
  • Spead to the vulva or penis
  • Subcutaneous involvement suggestive of cellulitis is normally absent
  • Absence of systemic signs of infection

Differential Diagnosis

Neonatal Rashes


  • Rapid strep test




  • Discharge home
  • Close follow up recommended as recurrence can occur in up to 39% of cases[3]

See Also

External Links


  1. Brilliant LC. Perianal streptococcal dermatitis. Am Fam Physician. 2000; 61(2):391-393.
  2. Barzilai A and Choen HA. Isolation of group A streptococci from children with perianal cellulitis and from their siblings. Pediatr Infect Dis J. 1998; 17:358–360.
  3. Kokx NP, Comstock JA, and Facklam RR. Streptococcal perianal disease in children. Pediatrics. 1987; 80:659–663.