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- Habitat in human: In female: lower genital tract; In males: urethra and prostate gland
- Detected in fresh vaginal secretions of infected female; urine sediment sample of infected male
Diagnostic Features
- Size: 7-30mm in length
- Pear shaped
- Characteristic jerky movement when live
- Undulating membrane, bordered by a flagellum, extends half way along body
- 05 flagella: 4 free flagella of equal length at anterior end; Fifth flagellum is bordered by undulating membrane,
- and supported by a flexible rod (costa)
- Single large, elongated nucleus with a small karyosome; chromatin granules evenly distributed
- Axostyle is centrally positioned; runs along length of trophozoite and extends beyond body
