The Deuteromycota or conidial fungi are a group of about 17,000 distinct species in which
the sexual reproductive features are either not known or are not used to classify them. Their lack
of sexual stages was the basis for them being called fungi imperfecti in the past. The term fungi
imperfecti was misleading because these fungi are abundant and flourishing. Most deuteromycota
have only asexual reproduction as the sexual stage of the life cycle has been lost or has yet to be
discovered. There are a great number of human uses for these fungi; most significant is the
production of antibiotics for medicinal use. These substances are produced by the fungus to
inhibit the growth of other living organisms around them; in particular, disease-causing bacteria.
These substances are extracted from the fungus and are used to kill bacteria in the human body.