With plural agreement. Originally: fungi and bacteria (considered as a division of the vegetable kingdom). Now: specifically fungi, especially microscopic pathogenic fungi.
Bacteria were formerly classified as fungi, under the name Schizomycetes, and members of the bacterial group Actinomycetes are still sometimes treated as fungi in non-specialist contexts.
Late 19th century; earliest use found in Von Ziemssen's Cyclopaedia of Practical Medicine. From post-classical Latin Mycetes from ancient Greek μύκητες, plural of μύκης mushroom, fungus.