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BIO NMDCAT Sexually transmitted diseases
nmdcat.online July 16, 2026

During clinical evaluation, a patient is found to have a single, painless, indurated ulcer on the external genitalia. Lymph nodes in the groin are enlarged but non-tender. This clinical presentation is characteristic of the primary stage of:

A. Gonorrhea
B. Genital Herpes
C. AIDS
D. Syphilis
✓

📝 Explanation

The correct option is Syphilis. The primary stage of syphilis is characterized by a hard, painless ulcer known as a chancre at the site of infection. Genital herpes presents with painful blisters/ulcers. Gonorrhea typically presents with discharge, not an ulcer.

📖 Additional Information

  • Gonorrhea
  • Genital Herpes
  • AIDS
  • Syphilis

The correct option is Syphilis. The primary stage of syphilis is characterized by a hard, painless ulcer known as a chancre at the site of infection. Genital herpes presents with painful blisters/ulcers. Gonorrhea typically presents with discharge, not an ulcer.

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