Marking the discarded items as infested can help prevent infesting new areas. Various mites (Acari) are known to be ectoparasites infesting the skin of the velvet worm. All "Hypomyces" species live by infesting other fungi. The insect is native to Europe, originally infesting varieties of millet, including broom corn. It requires herbivores including parrotfish and collector urchins that graze on infesting algae. Africans were blind to the already huge epidemic that was infesting their communities. The giant creature in return wounds Baltimore, infesting his leg with unnatural gangrene. The cheese fly ("Piophila casei") is a species of fly known for infesting human foodstuffs. It was infesting ships and harassing steamer passengers by 1922. Early diagnosis makes treatment easier and reduces the possibility of infesting others.