How is a clinical diagnosis of candidiasis definitively established?

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Presence of a distinctive smellIdentification of mycelia and spores in a scraping sampleImprovement following vitamin B12 injectionDetection of ray fungus within granules

Explanation

The definitive diagnosis of candidiasis is made by identifying fungal elements such as mycelia and spores in a scraping from the affected area. Other signs like odor or response to vitamin B12 are not reliable for confirming candidiasis.