oral thrush for 19 months

Hi,
Welcome to ehealthforum,
Oral thrush is caused by candida fungus and is usually seen in people with weakened immune system. Certain illnesses, stress, or medications can disturb the delicate balance, causing the fungus candida to grow out of control, causing thrush. Sometimes changing diet can help like: adding of certain foods to your diet (to help promote good bacteria) like live yogurt cultures (or take Acidophilus), plenty of water, fresh vegetables, lots of protein rich foods, whey protein, raw garlic, nuts, seeds, oils, millet, rice and oat brans etc; and avoiding certain foods in diet (to starve the yeast) like all sodas, sugars, fruit, fermented foods, foods containing white flour, alcohol (especially beer), antacids and any product that has yeast or mold. Wait for your test results and discuss the treatment options with your treating doctor/healthcare provider based on the investigation results.
Take care.