The causal agent of chancroid is which organism?

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Prepare for your Clinical Laboratory Science Exam. Study with flashcards and multiple-choice questions, each with hints and explanations. Get ready for your exam!

Multiple Choice

The causal agent of chancroid is which organism?

Explanation:
Chancroid is caused by Haemophilus ducreyi, a fastidious Gram-negative coccobacillus. This organism produces painful genital ulcers with tender inguinal lymphadenopathy, which helps differentiate chancroid from other sexually transmitted infections such as syphilis (presents with a painless chancre caused by Treponema pallidum), gonorrhea (Neisseria gonorrhoeae) or chlamydial infections (Chlamydia trachomatis). Haemophilus ducreyi grows best on chocolate agar with X (hemin) and V (NAD) factors, reflecting its specific nutritional needs. Thus, the causal agent of chancroid is Haemophilus ducreyi.

Chancroid is caused by Haemophilus ducreyi, a fastidious Gram-negative coccobacillus. This organism produces painful genital ulcers with tender inguinal lymphadenopathy, which helps differentiate chancroid from other sexually transmitted infections such as syphilis (presents with a painless chancre caused by Treponema pallidum), gonorrhea (Neisseria gonorrhoeae) or chlamydial infections (Chlamydia trachomatis). Haemophilus ducreyi grows best on chocolate agar with X (hemin) and V (NAD) factors, reflecting its specific nutritional needs. Thus, the causal agent of chancroid is Haemophilus ducreyi.

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