Final answer:
Most people in the USA who are diagnosed with chancroid have soft chancres on their genitals or other areas associated with sexual contact, such as the mouth and anus. Chancroid is caused by the gram-negative rod Haemophilus ducreyi.
Step-by-step explanation:
In the USA, most people who are diagnosed with chancroid have soft chancres on their genitals or other areas associated with sexual contact, such as the mouth and anus. Chancroid is caused by the gram-negative rod Haemophilus ducreyi. Unlike the hard chancres associated with syphilis, soft chancres develop into painful, open sores that may bleed or produce fluid that is highly contagious. Chancroid is a sexually transmitted infection that is exceedingly rare in the United States, with only a few cases reported each year. It is important to note that chancroid can increase the risk of acquiring HIV and other sexually transmitted diseases due to compromised protective barriers.