<prompt> The pathogenic organism responsible for causation of Donovaniasis is-Chlamydia trachomatisCalymmatobacterium granulomatisHaemophilus ducreyiHerpes simplex virus  <response>: Granuloma Inguinale Donovanosis Granuloma inguinale is a genital ulcerative disease caused by the intracellular gram-negative bacterium Klebsiella granulomatis formerly known as Calymmatobacterium granulomatis Ref Harrison20th edition pg 1078 