Write a short note on Trichomonas vaginalis
It is an anaerobic flagellated protozoan that causes trichomoniasis.
Source of infection: sexual intercourse
Infective form: Trophozoites
The parasite is mostly found in the vagina in females, but may also be found in the urethra or prostate of males. Though the most common route of transmission is sexual, but this organism can survive in moist environment outside the body. Thus infection through toilet seats, shared towels or other fomites have also been reported.
- Asymptomatic in men and most women
- Vaginal itching and/or erythema
- Foul smelling greenish discharge
- Dysuria and Dyspareunia
- Wet Film microscopic preparation: vaginal secretions or urethral scrapings shows motile trophozoites with methelene blue
- Other tests: antigen detection and PCR
TREATMENT: Treat both sexual partners with metronidazole
- J P Ackers. Principles and Practice of Clinical Parasitology: Amebas (pg 242-55)
- USMLE Step 1 Lecture Notes by Kaplan (2004). Section 1 - Medical Parasitology: Entamoeba Histolytica (pg 129)