Skin nontumor
Infectious disorders
Impetigo
Last author update: 1 February 2016
Last staff update: 15 February 2024
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PubMed Search: Impetigo skin
Table of Contents
Definition / general | Diagnosis | Clinical images | Case reports | Treatment | Microscopic (histologic) images | Differential diagnosis | Additional referencesCite this page: Soni A, Slominski A. Impetigo. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/skinnontumorimpetigo.html. Accessed April 20th, 2024.
Definition / general
- Contagious infection; either nonbullous (70%) or bullous (30%)
- Usually affects hands and face of normal children or adults in poor health
- Commonly due to Staphylococcus or Streptococcus infection (Cutis 2010;85:65)
- Methicillin resistant Staph aureus (MRSA) is becoming a new etiology (MedlinePlus: Impetigo [Accessed 27 August 2018])
- Rarely progresses to systemic infection, cellulitis, osteomyelitis, lymphangitis, post-infectious glomerulonephritis (most serious) or staphylococcal scalded skin syndrome (Am Fam Physician 2014;90:229)
Diagnosis
- Skin examination
- Culture of pus from skin lesions may help with pathogen identification and antimicrobial susceptibility testing
Clinical images
Images hosted on other servers:
Nonbullous impetigo
Bullous impetigo in shoulder region
Bullous impetigo in abdomen
Crusted impetigo
Case reports
- Newborn with impetigo contagiosa (BMJ Case Rep 2014;2014:bcr2014204639)
- 35 year old man with acute necrotizing swelling of lower lip (Oral Surg Oral Med Oral Pathol Oral Radiol 2012;113:e22)
Treatment
- Prevention through proper hygiene (washing affected areas and not sharing personal items with others)
- Topical antibiotics such as mupirocin, retapamulin, fusidic acid
- Oral antibiotics if topical therapy is impractical (amoxicillin / calvulanate, dicloaxacillin, clindamycin, doxycycline, macrolides)
Microscopic (histologic) images
Contributed by Jerad Gardner, M.D.
Impetigo contagiosa
Images hosted on other servers:
Subcorneal blister with inflammatory cells
Differential diagnosis
