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Tests and diagnosis
By Mayo Clinic staffYour doctor will likely examine your nails first. To test for fungi, your doctor may scrape some debris from under your nail for analysis.
The debris can be examined under a microscope or cultured in a lab to identify what's causing the infection. Other conditions, such as psoriasis, can mimic a fungal infection of the nail. Microorganisms, including yeast and bacteria, also can infect nails. Knowing the cause of your infection helps determine the best course of treatment.
- Onychomycosis. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merck.com/mmpe/sec10/ch125/ch125c.html?qt=nail%20fungus&alt=sh. Accessed June 30, 2009.
- Goldstein A, et al. Onychomycosis. http://www.uptodate.com/home/index.html. Accessed June 30, 2009.
- Nail problems. American Podiatric Medical Association. http://www.apma.org/MainMenu/Foot-Health/FootHealthBrochures/GeneralFootHealthBrochures/NailProblems.aspx. Accessed June 30, 2009.
- Watanabe D, et al. Successful treatment of toenail onychomycosis with photodynamic therapy. Archives of Dermatology. 2008;144:19.
- De Berker D. Fungal nail disease. The New England Journal of Medicine. 2009;360:2108.
- Hinojosa J, et al. Which antifungal is best for toenail onychomycosis? The Journal of Family Practice. 2007;56:581.
