Calymmatobacterium Granulomatis is a type of bacteria that causes a sexually transmitted disease called donovanosis. The disease is also known as granuloma inguinale or donovan skin disease. Some synonyms for Calymmatobacterium Granulomatis include Klebsiella granulomatis, Donovania granulomatis, and granuloma venereum. The disease mainly affects people in tropical and subtropical regions of the world, and it has been reported in parts of Asia, Africa, Central and South America, and the Caribbean. Symptoms of donovanosis include nodules or lumps in the genital or anal area, ulcerations, and genital swelling. Treatment typically involves antibiotics, but if left untreated, it can cause severe tissue damage and lead to complications.