Coccidioides immitis -- a fungal pathogen.

eukaryote

It's a fungus of the genus Coccidioides. Often the species is Coccidioides immitis. You can get valley fever (aka coccidioiomycosis) if you inhale it. People often get it after inhaling dust kicked up during plowing, or other soil disturbance.

Cocci is the pleural word for coccus which is a single round one-cell bacterium. It is an infection of the lungs caused by inhaling spores of the fungus Coccidioides immitis.