2. All species are dimorphic, with a temperature dependent switch from hyphae (27C) to yeast (37C).
In C. immitis, instead of producing yeast cells at 37C, the conidium swells to produce an endospore-forming cyst or spherule.
In all four species, however, the switch is relatively simple because the temperature shift is sufficient to trigger it.
This differs from C. albicans in which the switch from yeast-like to hyphal growth is influenced by a complexity of environmental factors.