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Question

Difficulty: MediumGynecologic Infections

A 23-year-old woman is contacted by her physician regarding laboratory results. She was evaluated at the student health center two days ago for a one-week history of increased, yellow-tinged vaginal discharge and spotting after intercourse. At that visit, a pelvic examination revealed a friable cervix with mucopurulent exudate, but no cervical motion, uterine, or adnexal tenderness. A vaginal wet mount showed numerous leukocytes but no clue cells, motile trichomonads, or yeast. Nucleic acid amplification testing (NAAT) of an endocervical swab was sent. The results are now available and are positive for *Neisseria gonorrhoeae* and negative for *Chlamydia trachomatis*. The patient has no known drug allergies. Which of the following is the most appropriate pharmacologic intervention for this patient?

  1. A
    Single-dose intramuscular ceftriaxone and a 7-day course of oral doxycycline
  2. B
    Single-dose intramuscular ceftriaxone and single-dose oral azithromycin
  3. Single-dose intramuscular ceftriaxoneAnswer
  4. D
    A 7-day course of oral doxycycline
  5. E
    Single-dose oral azithromycin

Answer

Targeted therapy with single-dose intramuscular ceftriaxone
The correct answer is targeted monotherapy with single-dose intramuscular ceftriaxone. This patient has acute cervicitis, with laboratory results definitively showing isolated Neisseria gonorrhoeae infection. Current guidelines emphasize antibiotic stewardship: while empiric therapy for cervicitis (when NAAT is pending) requires coverage for both gonorrhea (ceftriaxone) and chlamydia (doxycycline), targeted therapy should be used once NAAT results are available. Because Chlamydia trachomatis has been explicitly excluded, there is no indication to add doxycycline or azithromycin. The treatment for uncomplicated gonococcal infection of the cervix is a single intramuscular dose of ceftriaxone (500 mg for patients weighing < 150 kg).

Step-by-Step Solution

1
Analyze the clinical presentation and physical examination
The patient has signs of acute cervicitis (mucopurulent discharge, friability) without evidence of upper genital tract involvement (no cervical motion or adnexal tenderness), ruling out Pelvic Inflammatory Disease (PID).
Differentiating cervicitis from PID is critical, as PID requires broader, prolonged antibiotic coverage (e.g., adding anaerobic coverage).
2
Interpret the specific diagnostic test results
The endocervical NAAT is positive for Neisseria gonorrhoeae and explicitly negative for Chlamydia trachomatis.
NAAT is the gold standard for diagnosing cervical infections and provides targeted etiologic information.
3
Select the appropriate targeted antimicrobial therapy
The patient should receive ceftriaxone 500 mg intramuscularly as a single dose.
When NAAT results definitively exclude Chlamydia, empiric dual therapy is discontinued in favor of targeted monotherapy to promote antibiotic stewardship.

Key Concept

Targeted antibiotic therapy for confirmed gonococcal cervicitis
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Topics

Gynecologic Infections

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