InfectiousICD-10: A59.0About 3.7 million Americans are infected at any given time
Trichomoniasis
Also known as: Trich
Trichomoniasis is a common sexually transmitted infection caused by the parasite Trichomonas vaginalis. It primarily affects the urogenital tract and is more symptomatic in women than men. Trichomoniasis is easily curable with antibiotic treatment, but reinfection is common if sexual partners are not treated simultaneously.
Symptoms
Foul-smelling, frothy, greenish-yellow vaginal discharge in women
Vaginal itching, burning, or redness
Pain during urination or sexual intercourse
Lower abdominal discomfort
Most men are asymptomatic
Mild discharge, burning after urination, or irritation inside the penis in men
Causes
- Infection with the protozoan parasite Trichomonas vaginalis
- Transmission through vaginal sexual intercourse
- Rarely transmitted through shared wet towels or bathing suits
Risk Factors
- Multiple sexual partners
- History of other STIs
- Unprotected sexual intercourse
- Female sex, with higher rates in older women
Diagnosis
- Wet mount microscopy of vaginal secretions
- Nucleic acid amplification test (NAAT) as the most sensitive method
- Rapid antigen test
- Culture of vaginal or urethral specimens
Treatment
- Oral metronidazole or tinidazole as single-dose therapy
- Treatment of all sexual partners simultaneously
- Abstaining from sexual intercourse until treatment is complete and symptoms resolve
- Retesting three months after treatment due to high reinfection rates
Prevention
- Consistent condom use during sexual intercourse
- Limiting the number of sexual partners
- Partner notification and treatment
- Regular STI screening for sexually active individuals
When to See a Doctor
- Unusual vaginal discharge with odor or color change
- Pain or burning during urination or intercourse
- Genital irritation or itching
- If a sexual partner is diagnosed with trichomoniasis
Frequently Asked Questions
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