Trichomoniasis
Trichomoniasis (often called 'trich') is a common, curable sexually transmitted infection caused by the protozoan parasite Trichomonas vaginalis. Many people have no symptoms but can still transmit the infection.
Table of Contents
Quick Facts
- ICD-10: A59
- Cause: Trichomonas vaginalis
- Curable: Yes — antibiotic treatment
Symptoms
Women
- Frothy, yellow-green vaginal discharge with a strong odor
- Vaginal itching, burning, or redness
- Discomfort during intercourse or urination
Men
- Often no symptoms
- Itching or irritation inside the penis
- Burning with urination or ejaculation
- Discharge from the penis
Diagnosis
- NAAT (nucleic acid amplification test) — most sensitive
- Wet mount microscopy
- Rapid antigen tests
Treatment
- Metronidazole or tinidazole, oral
- Treat all sexual partners simultaneously
- Abstain from intercourse until both partners are treated and symptoms resolve
- Avoid alcohol during and shortly after treatment (severe reactions can occur)
- Retest at 3 months due to high reinfection rate
When to See a Doctor
See a doctor for vaginal or penile discharge, itching, or burning. Trichomoniasis can increase HIV transmission risk and pregnancy complications, so prompt treatment matters.
Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about a medical condition. If you are experiencing a medical emergency, call your local emergency number immediately.
References
- Centers for Disease Control and Prevention. Trichomoniasis — STI Treatment Guidelines.