Question

Difficulty: EasyGynecologic Infections

A 26-year-old woman evaluates at the urgent care center due to four days of copious, malodorous vaginal discharge associated with mild dysuria. Her medical history is unremarkable, and she recently became sexually active with a new male partner. Her temperature is 37.1∘C37.1^\circ\text{C} (98.8∘F98.8^\circ\text{F}). Speculum examination demonstrates frothy, yellow-green fluid pooled in the posterior vaginal fornix and several punctate macular hemorrhages on the cervix. A saline microscopy preparation of the fluid reveals multiple motile, pear-shaped, flagellated organisms slightly larger than polymorphonuclear leukocytes. Which of the following is the most appropriate pharmacological intervention?

  1. Prescribe oral metronidazole for the patient and concurrently treat her sexual partnerAnswer
  2. B
    Prescribe oral metronidazole for the patient alone
  3. C
    Administer intramuscular ceftriaxone and oral doxycycline
  4. D
    Prescribe a multi-day course of intravaginal terconazole
  5. E
    Prescribe intravaginal clindamycin cream for the patient alone

Answer

Prescribe oral metronidazole for the patient and concurrently treat her sexual partner.
The patient's presentation of a malodorous, frothy, yellow-green discharge, punctate cervical hemorrhages (colpitis macularis or 'strawberry cervix'), and motile flagellated organisms on a wet mount is definitively diagnostic of an infection with Trichomonas vaginalis. Because trichomoniasis is a sexually transmitted infection, systemic oral therapy (such as metronidazole) must be prescribed. Furthermore, it is critical to concurrently treat the patient's sexual partner(s) to eradicate the reservoir and prevent 'ping-pong' reinfection.

Step-by-Step Solution

1
Identify the pathogen based on the clinical signs and microscopic findings.
The combination of frothy, yellow-green discharge, a 'strawberry cervix' (colpitis macularis), and motile flagellated organisms is diagnostic for Trichomonas vaginalis.
Accurate identification of the organism is required to select the correct targeted antimicrobial therapy.
2
Determine the optimal pharmacological treatment for the identified pathogen.
Systemic oral metronidazole (or tinidazole) is the first-line treatment.
Systemic therapy is necessary because Trichomonas often infects the urethra and paravaginal glands where topical treatments cannot reach.
3
Determine if partner treatment is necessary based on the transmission route.
Concurrent treatment of all sexual partners is required.
Trichomoniasis is a highly contagious sexually transmitted infection; untreated partners will continuously reinfect the patient.

Key Concept

Diagnosis and management of Trichomoniasis, emphasizing the necessity of expedited partner therapy.
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