MUCORMYCOSIS (Black Fungi) Mucormycosis represents a group of life-threatening infections caused by fungi of the order Mucorales. Among the Mucorales, Rhizopus oryzae ,  Rhizopus microsporus, Rhizomucor pusillus, Lichtheimia corymbifera common causes of mucormycosis. PATHOGENESIS The Mucorales are ubiquitous environmental fungi to which humans are constantly exposed. These fungi cause infection primarily in patients with diabetes,