Table of Contents
- Impetigo facts
- What is impetigo? What causes impetigo?
- What are the types of impetigo? What are impetigo symptoms and signs? What does impetigo look like?
- Is impetigo contagious?
- How is impetigo diagnosed?
- What is the treatment for impetigo?
- What is the prognosis of impetigo? What are possible complications of impetigo?
- Will impetigo leave scars?
- Is it possible to prevent impetigo? What is the contagious period of impetigo? What is the incubation period of impetigo?
- What types of specialists treat impetigo?
Quick GuideBacterial Infections 101: Types, Symptoms, and Treatments
What are the types of impetigo? What are impetigo symptoms and signs? What does impetigo look like?
There are two forms of impetigo:
- Nonbullous impetigo: This is the more common form, caused by both staph and strep bacteria. This form initially presents as small red papules similar to insect bites. These lesions rapidly evolve to small blisters and then to pustules that finally scab over with a characteristic honey-colored crust. This entire process usually takes about one week. These lesions often start around the nose and on the face, but less frequently they may also affect the arms and legs. At times, there may be non-tender but swollen lymph nodes (glands) nearby.
- Bullous impetigo: This form of impetigo is caused only by staph bacteria. These bacteria produce a toxin that reduces cell-to-cell stickiness (adhesion) causing separation between the top skin layer (epidermis) and the lower layer (dermis). This leads to the formation of a blister. (The medical term for blister is bulla.) Bullae can appear in various skin areas, especially the buttocks and trunk. These blisters are fragile and contain a clear yellow-colored fluid. The bullae are delicate and often break and leave red, raw skin with a ragged edge. A dark crust will commonly develop during the final stages of development. With healing, this crust will resolve. Continue Reading
American Academy of Pediatrics. In: Pickering, L.K., C.J. Baker, D.W. Kimberlin, S.S. Long, eds. Red Book: 2012 Report of the Committee on Infectious Diseases. Elk Grove Village, IL: American Academy of Pediatrics, 2012.
Baddour, Larry M. "Impetigo." UptoDate.com. Sept. 2010.
1. Fitzpatrick's Color Atlas & Synopsis of Clinical Dermatology Klaus Wolff, Richard Allen Johnson, Dick Suurmond Copyright 2005, 2001, 1997, 1993 by The McGraw-Hill Companies. All Rights reserved.
3. Color Atlas of Pediatric Dermatology Samuel Weinberg, Neil S. Prose, Leonard Kristal Copyright 2008, 1998, 1990, 1975 by The McGraw-Hill Companies. All Rights reserved.
6. Getty Images/PhotoAlto
7. Getty Images/Hemera
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