H. ducreyi is a type of bacteria known to cause a sexually transmitted infection called chancroid. This infection is characterized by painful sores on the genital area, which can lead to complications if left untreated. The bacteria are primarily spread through sexual contact. Diagnosis of H. ducreyi infections typically involves a physical examination and laboratory tests. Treatment usually includes antibiotics, which can effectively clear the infection. Preventive measures, such as practicing safe sex, can help reduce the risk of transmission and associated complications.