Which organism causes chancroid in STI isolates?

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Multiple Choice

Which organism causes chancroid in STI isolates?

Chancroid in STI isolates is caused by Haemophilus ducreyi, a small Gram-negative coccobacillus that is fastidious and grows best on enriched media. This organism is classically associated with painful genital ulcers that have ragged, undermined borders and can be accompanied by tender inguinal lymphadenopathy. Among the listed organisms, this is the one linked to chancroid: Neisseria gonorrhoeae causes gonorrhea with purulent discharge and urethral or cervical infections but not typically chancroid ulcers; Treponema pallidum causes syphilis, which presents with a painless hard chancre; Gardnerella vaginalis is linked to bacterial vaginosis and does not produce genital ulcers. So the painful genital ulcers characteristic of chancroid point to Haemophilus ducreyi as the etiologic agent.

Chancroid in STI isolates is caused by Haemophilus ducreyi, a small Gram-negative coccobacillus that is fastidious and grows best on enriched media. This organism is classically associated with painful genital ulcers that have ragged, undermined borders and can be accompanied by tender inguinal lymphadenopathy. Among the listed organisms, this is the one linked to chancroid: Neisseria gonorrhoeae causes gonorrhea with purulent discharge and urethral or cervical infections but not typically chancroid ulcers; Treponema pallidum causes syphilis, which presents with a painless hard chancre; Gardnerella vaginalis is linked to bacterial vaginosis and does not produce genital ulcers. So the painful genital ulcers characteristic of chancroid point to Haemophilus ducreyi as the etiologic agent.

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