TY - CHAP M1 - Book, Section TI - Chancroid A1 - Dooley-Hash, Suzanne A1 - Herrman, Nicholas W.C. A2 - Knoop, Kevin J. A2 - Stack, Lawrence B. A2 - Storrow, Alan B. A2 - Thurman, R. Jason PY - 2021 T2 - The Atlas of Emergency Medicine, 5e AB - Chancroid is caused by Haemophilus ducreyi. Following a 4- to 10-day incubation period, patients develop erythematous papules that evolve into pustules. The pustules then erode forming painful ulcers. Differential diagnosis should include other causes of genital ulcerations including genital herpes and syphilis. Painful, suppurative inguinal lymphadenopathy develops in almost 50% of cases. Large infected lymph nodes may spontaneously rupture. Systemic symptoms are uncommon. SN - PB - McGraw-Hill CY - New York, NY Y2 - 2024/03/28 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1181041417 ER -