<prompt> Rare exclusive infection of diabetes mellitus are all except:MucormycosisAtypical mycobacterial infectionEmphysematous appendicitisHansens disease  <response>: D Hansens disease Mucormycosis is an invasive disease caused by phycomycetes, mainly by species of Rhizopus, Mucor and Absidia. It used to be a rare terminal complication of uncontrolled diabetes and other chronic debilitating diseases. The incidence of the disease has increased considerably as a result of the widespread use of antibiotics, steroids and antimetabolites. The fungi are normally avirulent and are able to invade tissues only when general resistance is extremely low. 