Chancroid was endemic worldwide until the 20th century, but is now most common in the Caribbean, Africa, Asia (except Thailand), and Latin America. There were an estimated 7 million new cases in the world during 1995;[9] however, due to difficulties in diagnosis and reporting, the true number is unknown.[10] The prevalence of chancroid has significantly declined in some countries, which is thought to be due to the therapeutic syndromic management of genital ulcer disease and significant social change.[8] In the US, the prevalence peaked in 1947 with over 9500 cases and has since declined dramatically.[11] In 2018, only 3 cases of chancroid were reported in the US.[11]

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