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Tests and diagnosis
By Mayo Clinic staffDoctors usually diagnose impetigo by considering signs and symptoms and medical history and looking at the distinctive sores. Your doctor will likely ask about any recent cuts, scrapes or insect bites to the affected area.
A culture may be necessary to confirm the diagnosis or to rule out another cause. During this test, your doctor uses a sterile swab to gently remove a small bit of pus or drainage from one of the sores. The sample is then cultured in a laboratory for the presence of bacteria.
- Skin infections. In: Habif TP. Habif: Clinical Dermatology. 4th ed. St. Louis, Mo.: Mosby; 2009. http://www.mdconsult.com/book/player/book.do?method=display&type=bookPage&decorator=header&eid=4-u1.0-B978-0-7234-3541-9..00018-3&displayedEid=4-u1.0-B978-0-7234-3541-9..00018-3--s0060&uniq=213489709&isbn=978-0-7234-3541-9. Accessed Aug. 10, 2010.
- Impetigo. In: Ferri FF. Ferri's Clinical Advisor 2010. St. Louis, Mo.: Mosby; 2009. http://www.mdconsult.com/book/player/book.do?method=display&type=bookPage&decorator=header&eid=4-u1.0-B978-0-323-05610-6..00018-4--s0510&uniq=213489709&isbn=978-0-323-05610-6&sid=1035787662. Accessed Aug. 10, 2010.
- Browning J, et al. Cellulitis and Superficial Skin Infections. In: Long SS, et al., eds. Principles and Practice of Pediatric Infectious Diseases. 3rd ed. Philadelphia, Pa.: Churchill Livingstone Elsevier; 2008. http://www.mdconsult.com/das/book/body/213489709-18/1035787662/1679/76.html#4-u1.0-B978-0-443-06687-0..50075-8--cesec3_1544. Accessed Aug. 10, 2010.
- Lio PA, et al. Topical Antibacterial Agents. Infectious Disease Clinics of North America. 2009;23:945.
- Waggoner-Fountain LA. Child Care and Communicable Diseases. In: Kliegman RM, et al. Nelson Textbook of Pediatrics. 18th ed. Philadelphia, Pa.: Saunders Elsevier; 2007. Accessed Aug. 10, 2010.
- Gibson LE (expert opinion). Mayo Clinic, Rochester, Minn. Aug. 12, 2010.
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