1- Trichomonas vaginalis.
- Cause Trichomoniasis.
- T. vaginalis infection is limited in men due to trichomonocidal activity of prostatic secretion and flushing out of the parasites from the urethra during micturition, although it may cause mild urethritis or occasionally prostatitis.
- In women, it is oftenasymptomatic,but if infections persist with vaginitis with frothy vaginal discharge of offensive odour and associated with itching.
2-Human Lice
a-Pediculus humanus.
- Pediculus humanus capitis (head louse),
- Pediculus humanus corporis (body louse) human lice cause : Epidemic typhus , Trench fever, Epidemic relapsing fever and Pediculosis.
b-Phthirus pubis : which causes Pediculosis and Blepharitis .
3-Sarcoptes scabiei : which is the causative parasite of scabies.