[2] It is a non-motile aerobic bacillus with a non-sporulated capsule measuring 0.5 to 2.0 μm.

[3][4] It is biochemically characterised by being as catalase-positive, phenylalanine deaminase-negative, citrate test-positive, and urease-positive.

[5] Among its virulence factors are its capsule, endotoxins, siderophores, antimicrobial resistance and antigenic phase variation.

[7] This rare form of genital ulceration is on the verge of being eradicated worldwide.

[8] Thanks to the recognition as a public health problem and appropriate control measures such as the implementation of better health service provisions, the incidence of this microorganism in countries such as Papua New Guinea, South Africa, India and the Caribbean has decreased significantly.