Cells of the wood-eating fungus, Coniochaeta pulveracea, exhibit both yeast- and fungus-like type characteristics while breaking down twigs from an Acacia tree. Disclaimer: AAAS and EurekAlert!
Your provider may also take a sample of your nail to examine it under a microscope. After removing the nail sample, they'll send it to a lab for a fungal culture to determine the type of fungus ...