Trichomoniasis Symptoms
In women, trichomoniasis typically presents with a diffuse, malodorous, yellow-green vaginal discharge accompanied by vulvar irritation, though many women have minimal or no symptoms; in men, most infections are asymptomatic, but some present with nongonococcal urethritis characterized by urethral discharge and irritation. 1
Women's Symptoms
Common Presentations
- Vaginal discharge: Characteristically diffuse, malodorous, and yellow-green in color 1, 2, 1
- Vulvar irritation: Frequently accompanies the discharge 1
- Additional symptoms may include:
- Vaginal soreness
- Vulvar burning
- Dyspareunia (painful intercourse)
- External dysuria (painful urination) 2
Physical Examination Findings
- "Strawberry cervix": Red punctate lesions visible on cervical examination, though this classic finding is not always present 3
- Cervical friability and hyperemia: May indicate infection 3
- Elevated vaginal pH: pH >4.5 (normal is <4.5) 3
- Increased white blood cells on microscopic examination 3
Important Clinical Note
Many women have minimal or no symptoms despite active infection 1, making this a frequently missed diagnosis that can lead to ongoing transmission and complications.
Men's Symptoms
Typical Presentation
Most men infected with T. vaginalis are asymptomatic 1, 2, 1, which contributes significantly to ongoing transmission as men unknowingly spread the infection to sexual partners 4.
When Symptomatic
Men who do develop symptoms typically present with nongonococcal urethritis 1 characterized by:
- Urethral discharge: Most common symptom, typically milky white and fluid in nature 5, 6
- Urethral irritation or discomfort 5, 6
- Dysuria (painful urination) 5
- Prolonged symptom duration: In one study, 78% of men had symptoms present for more than 4 weeks 6
Physical Examination Findings in Men
- Visible urethral discharge on examination 5
- Inflammatory cells in urethral secretions 5
- Relatively few polymorphonuclear leukocytes but many epithelial cells on microscopic examination 6
Critical Clinical Pitfalls
The wet mount microscopy misses trichomoniasis 30-50% of the time 3, so negative microscopy does not rule out infection. Culture, nucleic acid amplification tests (NAATs), or antigen-based rapid testing are more sensitive diagnostic methods 3, 7.
The asymptomatic nature of infection in many patients—particularly men—means that partner notification and treatment are essential to prevent reinfection and ongoing transmission 1, 2, 1.
In pregnant women, vaginal trichomoniasis has been associated with premature rupture of membranes, preterm delivery, and low birth weight 1, making prompt diagnosis and treatment particularly important in this population.