It all depend what you want to call candida. The troublemaker syndrome that cause many health problems and allergies has been called of many different forms. If you speak about what Dr. Truss brought to the light, I mean, an intestinal overgrowth or The Yeast Syndrome, Candida Ralated Complex, Chronic candidiasis, etc, then there is a very effective test to diagnosis it. Candida Immunecomplexes is the most reliable test to detect an intestinal overgrowth. This test look for the bond of anticandida antibodies and antigens in blood. At this time, there is only one lab in US that do this test. Genova Diagnosis in NC. AAL Reference Lab is part of the Genova Group now. This test will give you results of the main immuneglobulins in blood plus immunecomplexes. This is a definitive tool to diagnosis an intestinal candidiasis.