Management of Internal and External Dysuria with Vaginal Odor

Diagnostic Considerations

The American Academy of Family Physicians recommends treatment with metronidazole 500 mg twice daily for 7 days as the first-line therapy for patients with internal and external dysuria, vaginal odor, and leukocytes in the urine analysis, as this presentation is most consistent with bacterial vaginosis or trichomoniasis 1
Bacterial Vaginosis (BV) is characterized by malodorous discharge, often with minimal irritation, and is associated with positive leukocytes 2
Trichomoniasis presents with malodorous yellow-green discharge, dysuria, and vulvar irritation, and is often accompanied by leukocytes in urine 2
The Centers for Disease Control and Prevention recommends diagnosis of trichomoniasis by visualization of motile trichomonads 3
Vulvovaginal Candidiasis (VVC) presents with pruritus, external dysuria, and thick white discharge, and is associated with the presence of yeast or pseudohyphae on microscopy 4

The Infectious Diseases Society of America recommends complete vaginal pH testing to differentiate BV and trichomoniasis (pH >4.5) from candidiasis (pH ≤4.5) 4, 1
Wet mount microscopy with saline and 10% KOH is recommended to identify trichomonads, yeast or pseudohyphae 3, 4, 2

The American Academy of Family Physicians recommends metronidazole 500 mg orally twice daily for 7 days for the treatment of bacterial vaginosis 1
The Centers for Disease Control and Prevention recommends metronidazole 2 g orally in a single dose for the treatment of trichomoniasis 1, 7
The Infectious Diseases Society of America recommends fluconazole 150 mg orally as a single dose for the treatment of vulvovaginal candidiasis 4, 5

Mixed infections are common and may require combination therapy, according to the American Academy of Family Physicians and the Centers for Disease Control and Prevention 1, 2
Recurrent symptoms may indicate reinfection, resistant organisms, or incorrect diagnosis, and may require maintenance therapy with fluconazole 150 mg weekly for 6 months 4, 1

The American Academy of Family Physicians recommends follow-up is unnecessary if symptoms resolve for bacterial vaginosis or trichomoniasis 1
The Centers for Disease Control and Prevention recommends return only if symptoms persist or recur within 2 months for vulvovaginal candidiasis 2

The American Academy of Family Physicians and the Centers for Disease Control and Prevention recommend against treating empirically without proper diagnosis, and emphasize the importance of treating sexual partners in cases of trichomoniasis 1, 7