RT Book, Section A1 Staat, Mary Allen A2 Rudolph, Colin D. A2 Rudolph, Abraham M. A2 Lister, George E. A2 First, Lewis R. A2 Gershon, Anne A. SR Print(0) ID 7025494 T1 Chapter 258. Chancroid (Hemophilus Ducreyi) T2 Rudolph's Pediatrics, 22e YR 2011 FD 2011 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-149723-7 LK accesspediatrics.mhmedical.com/content.aspx?aid=7025494 RD 2024/04/23 AB Chancroid is a sexually transmitted disease caused by the organism Haemophilus ducreyi.1,2 It is characterized by painful genital ulcers and tender inguinal adenopathy that may suppurate. Also known as “soft chancre,” chancroid is one of the three major causes of genital ulcer disease among young sexually active patients in the United States; the other major causes are genital herpes and syphilis.