Calymmatobacterium granulomatis is the causative agent of donovanosis (also
known as granuloma inguinale), an uncommon but important cause of genito-u
lcerative disease. Although one of the 'neglected' sexually transmitted inf
ections (STI); there have been a number of important advances in the unders
tanding of the microbiology and molecular biology of the organism in the la
st few years.