There are over 100,000 species of fungi, but less than 300 pathogens. I will talk about a dozen of those pathogens. All fungi are eucaryotic cells. Usually molds produce some type of reproductive spores . Yeast are the other morphological category of fungi.
Yeasts are unicellular eucaryotes .
They reproduce by asexual budding . Most fungi are opportunistic pathogens since humans are usually resistant to infection unless they are immunocompromised or special conditions exist. Most Fungi don't like body temp, our skin pH, or low O2 Fungal infection can occur in people with unusual skin pH, smokers with damaged lung defenses, etc. Fungal infections do not commonly occur in people with normal immune function. Systemic infections are the most serious and the most difficult to treat of the fungal infections.