Rhizopus microsporus is a fungal plant pathogen infecting maize, sunflower, and rice. Used in the preparation of traditional soy fermentation such as tempeh and sufu (see Rhizopus oligosporus). It can also cause a nosocomial infection and necrosis to the infected area, particularly prevalent in pre-term infants. This fungus contains the bacterial endosymbiont Burkholderia rhizoxinica that produces the antitumor drug rhizoxin.