Thrush is clinically diagnosed by a physician or dentist when the characteristic-looking white patches are found in the mouth or throat.
Thrush that extends into the esophagus can be serious. To help diagnose this condition, your doctor may ask you to have one or both of these tests:
In this procedure, the back of your throat is swabbed with sterile cotton. Then the tissue sample is cultured on a special medium to help determine which bacteria or fungi, if any, are causing your symptoms.
In this procedure, your doctor examines your esophagus, stomach and upper part of your small intestine (duodenum) using a lighted, flexible tube with a camera on the tip (endoscope).