Which antibiotic is listed as an acceptable treatment option for chancroid?

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Chancroid is treated with antibiotics that reliably eradicate Haemophilus ducreyi, with a single-dose regimen offering both effectiveness and ease of use. Azithromycin given as a 1 g oral dose is an effective option because it achieves good concentration at the infection site and simplifies adherence, which helps ensure completion of therapy and reduces transmission. Other regimens exist (such as ceftriaxone given as an injection, ciprofloxacin for a few days, or erythromycin for a week), but among the choices listed, azithromycin is the only one that aligns with current primary treatment recommendations for chancroid. Amoxicillin isn’t reliably effective against H. ducreyi; metronidazole targets anaerobes and protozoa, not this organism; doxycycline has limited or less favorable evidence for chancroid and is typically avoided in pregnancy due to safety considerations.