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Mycoplasma genitalium (Mgen)

Mycoplasma genitalium is also known as Mgen and MG.

How common is Mgen?

Mgen is the newest addition to the STI portfolio – research tells us it’s on the rise and may have higher incidence than other STIs like Chlamydia.

If you’ve already got an STI, you’re more likely to have Mgen.

That said, the more partners you have, the more likely you are to get it.

What causes Mgen?

It’s a sexually-transmitted bacterium that infects the urinary and genital tracts.

What are the symptoms of Mgen?

Most people with MG have no symptoms and the infection clears itself naturally. If you’re not so lucky you might get one or more of these:

  • pain when urinating (urethritis)
  • a discharge
  • pain in your testicles
  • proctitis, an inflammation in the rectum causing anal pain and discharge

If you know one of your partners has Mgen then make haste to the clinic for a urine text.

How is Mgen passed on?

It’s spread through unprotected anal sex. You can’t get it from oral.

How is Mgen prevented?

Using a condom for anal sex.

How is Mgen treated?

Mgen is treated with antibiotics. Some strains have developed resistance to some commonly used antibiotics so you might have to take several rounds of different drugs to clear the infection.

You may still be able to pass it on for up to 14 days after completion of treatment so avoid unprotected sex.

Treatment of MG for people who have HIV is the same.
Last review: 29/08/2018
Next review: 29/08/2021