Physical signs
Trichomonas, pregnancy and babies
Tests and treatments
Trichomonas is a very common sexually transmitted infection caused by a protozoan parasite called 'Trichomonas vaginalis', Trichomonas can also be referred to as 'trick'.
Physical signs
In women, Trichomonas causes a vaginal infection, often with a frothy yellow-green discharge, and an unusual vaginal odour, as well as possibly feeling itchy or sore and experiencing pain when urinating or having sex. Although these physical signs can become quite severe, there is no long term health problems associated with Trichomonas.
Men usually show no physical signs.
Tests and treatments
If you suspect you may have Trichomonas, or be at risk of having a sexually transmitted infection, you need to ask your caregiver for a test. To detect Trichomonas, a sample of the woman's vaginal discharge is placed on a glass slide. The caregiver can then view the protozoa moving under the microscope. This is a quick test called a 'wet mount smear' that can be done at the time of the consultation. A swab test from the woman's vagina or cervix can also be used, but needs to be sent to a pathologist for testing.
Treatments.Trichomonas is usually cured by taking a single dose of metronidazole (or Flagyl). Some caregivers recommend repeating the dose 2 weeks later. The woman's partner also needs to be treated to stop the woman becoming reinfected (even if the partner does not have physical signs). Sex needs to be avoided until 24 hours after both partners are treated.
Pregnancy. Metronidazole (or Flagyl) has been used since the 1960's. Studies so far have not found any conclusive evidence to link Flagyl with abnormalities in the baby if given during the first 12 weeks of pregnancy. However, most caregivers advise delaying the use of Flagyl until after 12 weeks.