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Perianal streptococcal infection in Child
Other Resources UpToDate PubMed

Perianal streptococcal infection in Child

Contributors: Nnenna Agim MD, FAAD, Susan Burgin MD
Other Resources UpToDate PubMed


Perianal streptococcal dermatitis is the presence of intense perianal erythema with or without scale that is caused by infection with group A beta-hemolytic Streptococci. Group B Streptococci and non-group A or group B Streptococci have also been reported in some cases. It typically occurs between the ages of 6 months and 10 years. It has been rarely reported in adults. Some studies indicate a male predilection.

It can occur in children with streptococcal pharyngitis, but in healthy children, gastric acid should eliminate most of the swallowed pharyngeal bacteria. Digital contamination from an infected site, such as the pharynx or skin, may be the source. Intrafamilial spread is thought to be due to communal bathing or direct contamination. Diapering by a caregiver with streptococcal pharyngitis or carriage may also cause transfer of the infective organism.

In susceptible patients, perianal streptococcal infection can trigger classic, inverse, or guttate psoriasis. In one report, 11% of patients with perianal streptococcal dermatitis also presented with psoriasis.


A49.1 – Streptococcal infection, unspecified site
K62.89 – Other specified diseases of anus and rectum

238412006 – Perianal streptococcal infection of newborn
402709000 – Infective dermatosis of perianal skin
402937004 – Streptococcal infection of skin

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Differential Diagnosis & Pitfalls

  • Inverse psoriasis
  • Diaper irritant contact dermatitis
  • Diaper dermatitis candidiasis
  • Psoriasis
  • Seborrheic dermatitis
  • Child sexual abuse
  • Pinworm infection
  • Local trauma from Physical child abuse
  • Crohn disease or Ulcerative colitis
  • Fixed drug eruption
  • Acrodermatitis enteropathica (zinc deficiency) – Acquired acrodermatitis enteropathica or Hereditary acrodermatitis enteropathica

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Last Reviewed:08/03/2021
Last Updated:08/03/2021
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Perianal streptococcal infection in Child
A medical illustration showing key findings of Perianal streptococcal infection : Perianal pain, Anal pruritus, Dyschezia
Copyright © 2024 VisualDx®. All rights reserved.