Aijian, i had some stuff analysed at a lab four times last year. Twice under a scanning electron microscope and twice under a regular mircoscope and there was no candida and no candida in a biofilm detected. The Dr said there were some yeast cells present, but not en masse. I was pretty disappointed to say the least.
This Dr seemed to know what he was talking about as he was an infectious diseases specialist/clinical microbiologist and said biofilms were one of his main areas of interest.
Despite the results I still don't think it means that candida isnt the underlying problem. All the people who have posted photos have basically shown the same stuff. We all improve to some degree on antifungal treatments. There just seems to be a missing link.