The development of medical mycology as a discipline in the United Stat
es was investigated within the historical context of the last 100 year
s. Scientific contributions were conceptualized into five developmenta
l eras. The era of discovery (1894 to 1919) was characterized by the r
ecognition of certain fungi as etiologic agents of severe disease by p
hysicians who were not trained as medical mycologists. The first medic
al mycological research and training programs were established between
1926 and 1949, the formative years, when the high incidence and preva
lence of mycoses among the troops during World War II demanded improve
d patient care. By 1950, the high mortality rate for patients with sev
ere mycoses led to a period described as the advent of antifungal and
immunosuppressive therapies (1950 to 1969). During the 1970s, the year
s of expansion, the increased incidence of mycoses in immunosuppressed
patients and important advances in technology changed the direction o
f development. Since 1980, a higher incidence of mycoses has once more
brought major change to the discipline, as the AIDS pandemic ushered
in the era of transition. Within the discipline, many leaders either r
etired or died, and major reductions in government and corporate suppo
rt eliminated training programs and prevented the replacement of facul
ty. The result is a crisis in medical mycological training in the 1990
s, whereas research continues to change and expand with the influx of
new specialists from other areas of medicine.