“…Symmers reported that mycoses were observed “very exceptionally, in the absence of any recognized predisposing disease.” 9 Contemporary reports of neonatal sepsis with Aspergillus sydowi (sic) in multiple organs, 7 or chronic, progressive, disseminated disease with Trichophyton purpureum Bang in an otherwise healthy adult 10 exemplify these rare, sporadic occurrences. Indeed, ~50 years earlier, historical cases of severe or disseminated disease enabled the sentinel isolation and identification of thermally dimorphic, endemic fungi by medical mycology's pioneers, including blastomycosis by Gilchrist, 11 coccidioidomycosis by Posadas and Wernicke, 12 histoplasmosis by Darling, 13 paracoccidioidomycosis by Lutz, 14 and talaromycosis by the teams of Segretain 15 and Jayanetra 16 . These rare, singular cases were also an indication of an unusual diathesis.…”