Mycoplasma Genitalium (MGen): Symptoms, Testing, and Treatment via UK Online Doctor

Mycoplasma genitalium, commonly known as MGen, is a bacterium that can be transmitted through unprotected sexual contact. While it was only discovered in the 1980s, it is now recognised as a significant cause of inflammatory conditions in the urinary and reproductive tracts. In the UK, public health awareness of MGen has grown because the infection can mirror the symptoms of more common STIs like chlamydia or gonorrhoea, yet it requires a different antibiotic approach.

According to BASHH (British Association for Sexual Health and HIV) guidelines, MGen is a major cause of non-gonococcal urethritis (NGU) in men and is linked to pelvic inflammatory disease (PID) in women. One of the most challenging aspects of MGen is its ability to develop resistance to antibiotics, making early and accurate diagnosis critical for effective recovery.

Many people with MGen display no symptoms at all, which allows the infection to spread unknowingly between partners. However, when symptoms do occur, they typically involve inflammation of the urethra or cervix.

Symptoms in Women

• Unusual vaginal discharge: Changes in the colour, consistency, or smell of discharge.
• Pain during sex: Discomfort or deep pelvic pain during or after intercourse.
• Bleeding: Spotting between periods or bleeding after sex.
• Pelvic pain: A dull ache in the lower abdomen.

Symptoms in Men

• Urethral discharge: Clear or white fluid leaking from the tip of the penis.
• Dysuria: A stinging or burning sensation when passing urine.
• Prostatitis: In rare cases, discomfort in the pelvic area or testicles.

If you have visited a sexual health clinic for a standard screen, you may not have been tested for MGen. Most routine NHS sexual health checks focus on chlamydia, gonorrhoea, syphilis, and HIV. Because MGen is difficult to culture in a laboratory, it requires a specific Nucleic Acid Amplification Test (NAAT).

In the UK, NICE and BASHH recommend testing for MGen specifically in patients who have persistent symptoms that have not responded to first-line antibiotics for chlamydia or NGU. If you have recurring discharge or discomfort after treatment, it is vital to discuss MGen testing with a healthcare professional. Private online doctor services can often provide guidance on how to access these specialist tests or provide a confidential environment to discuss your symptoms.

Treating MGen is more complex than treating chlamydial infections. Traditionally, a course of azithromycin was used; however, data in the UK shows that many strains of MGen are now resistant to this drug. Current clinical guidance often suggests a multi-stage approach or a different class of antibiotics called fluoroquinolones (such as moxifloxacin).

Important Treatment Rules:

• Finish the course: Even if symptoms disappear, you must complete all prescribed medication to prevent resistance.
• Partner notification: Sexual partners should be informed and tested to prevent reinfection.
• Abstinence: You must avoid all sexual contact (including oral sex) until both you and your partner have completed treatment and any follow-up tests are clear.

If you are experiencing symptoms of an STI, seeking advice quickly is the best way to protect your long-term health. An online doctor in the UK can offer a discreet and confidential consultation from the comfort of your home. This is particularly useful for those who may feel hesitant about visiting a physical clinic or who need an immediate assessment of their symptoms.

During a consultation, the GP will ask about your symptoms, your sexual history, and any previous treatments you have tried. While they cannot always provide an MGen-specific prescription without a positive lab result (due to antibiotic stewardship), they can advise you on which tests to order, provide sick notes if your symptoms are severe, and guide you on the next steps for specialist care within the NHS or private sector.

Ignoring the symptoms of MGen can lead to serious reproductive health issues. In women, the infection can ascend to the uterus and fallopian tubes, causing Pelvic Inflammatory Disease (PID). This can result in chronic pelvic pain, ectopic pregnancy, and infertility. In men, MGen is a leading cause of persistent urethritis, which can cause significant discomfort and, in rarer cases, may affect fertility.

By addressing the infection early through a professional consultation and targeted testing, these risks are significantly reduced. Modern medicine is highly effective at managing MGen, provided the correct antibiotics are used for the specific strain involved.