Ducrey’s bacillus
Quick Summary
Ducrey's bacillus, scientifically known as Haemophilus ducreyi, is a bacterium that causes chancroid, a sexually transmitted disease. This infection typically manifests in the genital area, appearing as painful, shallow ulcers three to five days after exposure. These ulcers are distinct from those of syphilis, being referred to as soft chancres. The infection can also lead to swollen and inflamed lymph nodes. While Haemophilus ducreyi is a specific cause of chancroid, the Haemophilus genus includes other bacteria, some of which can cause various infections in humans and animals. Chancroid is primarily treated with antibiotics.123
Ask Britannica AI about this topic
Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.
chancroid…area, caused by the bacillus Haemophilus ducreyi. It is characterized by the appearance, 3–5 days after exposure, of a painful, shallow ulcer at the site of infection. Such an ulcer is termed a soft chancre, as opposed to a hard chancre, which is the characteristic lesion of the primary stage…
Read More…area, caused by the bacillus Haemophilus ducreyi. It is characterized by the appearance, 3–5 days after exposure, of a painful, shallow ulcer at the site of infection. Such an ulcer is termed a soft chancre, as opposed to a hard chancre, which is the characteristic lesion of the primary stage…
Read More
sexually transmitted diseaseChancroid and granuloma…is caused by the bacterium Haemophilus ducreyi and resembles in appearance the primary chancre of syphilis. Granuloma inguinale is caused by the bacterium Klebsiella (Calymmatobacterium) granulomatis. The lesion begins as a small sore but may spread to involve large areas, usually in the genital region, in a destructive ulcerating lesion.…
Read More…is caused by the bacterium Haemophilus ducreyi and resembles in appearance the primary chancre of syphilis. Granuloma inguinale is caused by the bacterium Klebsiella (Calymmatobacterium) granulomatis. The lesion begins as a small sore but may spread to involve large areas, usually in the genital region, in a destructive ulcerating lesion.…
Read More