Viewing the fungi under a microscope, Micheli was reminded of the shape of an aspergillum(holy water sprinkler), from Latin spargere (to sprinkle), and named the genus accordingly.Aspergillosis is the group of diseases
caused by Aspergillus.The symptoms include fever, cough, chest pain or breathlessness. Today "aspergillum" is also the name of an asexual spore-forming structure common to all Aspergilli; around one-third of species are also known to have a sexual stage.Aspergillus species are highly aerobic and are found in almost all oxygen-rich environments, where they commonly grow as molds on the surface of a substrate, as a result of the high oxygen tension.Species of Aspergillus are important medically and commercially. Some species can cause infection in humans and other animals. Usually, only patients with already weakened immune systems or who suffer other lung conditions
are susceptible.Infections can be t1reated.