Trichomoniasis is caused by Trichomonas vaginalis, a flagellated motile protozoan.
- Approximately 174 million people worldwide are infected with this parasite each year, making it the most common curable sexually transmitted infection worldwide. In the U.S., it is estimated that about 3.7 million people have the infection. Only about 30% of these people will have any symptoms.
- The average size of a trichomonad is 15 mm (they are not visible with the naked eye).
- Reproduction of the parasites occurs every 8 to 12 hours.
- Trichomonas vaginalis was isolated in 14% to 60% of male partners of infected women and in 67% to 100% of female partners of infected men. It is unclear why women are infected more often than men. One possibility is that prostatic fluid contains zinc and other substances that may be harmful to trichomonads.
Medically Reviewed by a Doctor on 3/18/2015
Must Read Articles Related to Trichomoniasis
Antibiotics are prescribed to individuals to cure disease by killing bacteria. There are over 100 antibiotics. The main classes of antibiotics include penicilli...learn more >>
Sexually Transmitted Diseases
Sexually transmitted diseases (STDs) are among the most common infectious diseases in the United States. STDs can be spread through any type of sexual activity ...learn more >>
Testicle Infection (Epididymitis)
Epididymitis is inflammation or infection of the epididymis that is usually caused by a bacterial infection. Two main groups of organisms are responsible for mo...learn more >>
Patient Comments & Reviews
The eMedicineHealth doctors ask about Trichomoniasis: