fungi coccidioides immitis, saprophytic stage, 3d

coccidioides fungi coccidioidomycosis infection illustration pathogenic arthroconidia soil 3d saprophytic stage respiratory research microscopic opportunistic mycology mycelium mold science microbiology infectious lung spore hiv fungus environmental form ecology disease conidia colorful immitis valley fever medicine aids dimorphic ascomycetes fungal inhalation spores posadasii endemic desert saprophyte animal microscope microscopy black background isolated