White tongue coating recurring for over a month. full blood (diabetes, vita deficiency, even hiv are all negative). culture shows rhino. please help!?

Secondary Infection?: Rhino-virus is not a bacteria, but many times "flu" or "cold-type" symptoms are treated with antibiotics. This results in other oral flora (fungus, bacteria, virus) over-growing. They may result in a white coating of the tongue. Discontinuing antibiotics and using oral rinses may help resolve this. If it persists, then further investigation may be warranted.

Very often a: White coating on the tongue is a sign of opportunistic overgrowth of candida albicans. (oral thrush) there may be something assisting this overgrowth, such as recent antibiotic therapy, steroid therapy, asthma inhalers, and/or an immune system issue. There are rx antifungal medications to help. See your dentist/oral surgeon/pcp for an evaluation of your condition.