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Tests and diagnosis
By Mayo Clinic staff
If thrush is limited to your mouth
Oral thrush can usually be diagnosed simply by looking at the lesions, but sometimes a small sample is examined under a microscope to confirm the diagnosis.
In older children or adolescents who have no other identified risk factors, an underlying medical condition may be the cause of oral thrush. If your doctor suspects that to be the case, your doctor will perform a physical exam as well as recommend certain blood tests to help find the source of the problem.
If thrush is in your esophagus
Thrush that extends into the esophagus can be serious. To help diagnose this condition, your doctor may ask you to have one or more of the following tests:
- Throat culture. In this procedure, the back of your throat is swabbed with sterile cotton and the tissue sample cultured on a special medium to help determine which bacteria or fungi, if any, are causing your symptoms.
- Endoscopic examination. In this procedure, your doctor examines your esophagus, stomach and the upper part of your small intestine (duodenum), using a lighted, flexible tube with a camera on the tip (endoscope).
- Candidiasis. Centers for Disease Control and Prevention. http://www.cdc.gov/nczved/dfbmd/disease_listing/candidiasis_gi.html. Accessed June 29, 2009.
- Candidiasis. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merck.com/mmpe/print/sec10/ch120/ch120b.html. Accessed June 17, 2009.
- Lustig LR, et al. Ear, nose, & throat disorders. In: McPhee SJ, et al. Current Medical Diagnosis and Treatment 2009. New York, N.Y.; McGraw-Hill/Lange; 2009. http://www.accessmedicine.com/content.aspx?aID=2356. Accessed June 29, 2009.
- Candidiasis. American Academy of Pediatric's Redbook. http://aapredbook.aappublications.org. Accessed June 29, 2009.
- Kauffman CA. Clinical manifestations of oropharyngeal and esophageal candidiasis. http://www.uptodate.com/home/index.html. Accessed June 16, 2009.
- Lakshman PS, et al. Oral mucosal fungal infections. Periodontology 2000. 2009;49:39.
- Is thrush causing my sore nipples? La Leche League International. http://www.llli.org/FAQ/thrush.html. Accessed June 29, 2009.
- Gonsalves WC. Common oral conditions in older persons. American Family Physician. 2008;78:845.
- Diabetes and oral health. American Dental Association. https://www.ada.org/prof/resources/pubs/jada/patient/patient_18.pdf. Accessed June 29, 2009.
- Hoecker JL (expert opinion). Mayo Clinic, Rochester, Minn. June 30, 2009.
