The Fungitell® assay measures the presence of (1→3)-β-D-Glucan in serum and CSF. Studies have shown that glucan levels become elevated in fungal infection in advance of conventional clinical signs and symptoms. The assay therefore has utility as an aid in the presumptive diagnosis of invasive fungal disease in at risk patients. Serum is the only specimen type cleared by the FDA for this assay. Performance characteristics of CSF have been validated by MiraVista Diagnostics.