Mycoplasma Genitalium in Phuket: The STI Most Clinics Do Not Even Test For

Clinically reviewed by Dr. Ponlawat Pitsuwan, Physician, Takecare Clinic Phuket. Last reviewed: October 2026

You tested negative for chlamydia after a night out in Patong. Negative for gonorrhoea too. Two weeks later the burning is still there, and you are quietly wondering if the test missed something. In most cases in Phuket, it did. Not because the test was wrong, but because it never looked for mycoplasma genitalium in the first place.

Mycoplasma genitalium, or Mgen, is one of the most consistently undiagnosed sexually transmitted infections I see across this island. Most standard STD panels at Phuket clinics cover chlamydia, gonorrhoea, syphilis, HIV, and herpes. Mgen is not on that list unless someone specifically adds it. If your clinic did not mention it, they almost certainly did not test for it.

What Standard STD Tests Miss in Phuket

Standard panels were built around infections that labs could detect cheaply and quickly. Mgen is harder to identify. It requires a specific PCR test ordered by name. It is not bundled into a routine sexual health screen at most Phuket clinics, and many facilities simply leave it out.

The gap this creates is real. Patients come in with symptoms that look exactly like chlamydia or gonorrhoea, test negative for both, and get sent away without answers. I see this pattern consistently. A tourist from Europe or Australia gets a clean result at a walk-in clinic, flies home still symptomatic, and finds out weeks later it was Mgen all along. That is a preventable outcome.

Mycoplasma Genitalium Symptoms in Men and Women

Most people with Mgen have no symptoms at all. That detail matters enormously for visitors on a short trip who might dismiss mild discomfort as heat, dehydration, or a long night out.

In men who do develop symptoms, the most common picture is a burning sensation when urinating, discharge, and irritation at the tip of the penis. It looks and feels like chlamydia. There is no clinical way to tell the difference without testing.

In women, Mgen can cause discharge, pelvic discomfort, or pain during sex. Some women notice nothing at all. Others describe something vague enough that they put it down to a UTI or a change in environment.

The asymptomatic majority is the real concern. If you had unprotected sex while in Phuket and have not specifically requested an Mgen PCR test, you do not know your status. A negative chlamydia result does not cover it.

Why Mycoplasma Genitalium in Phuket Carries Extra Risk

Mgen is harder to treat in this part of the world than in Europe or North America. Published data from the Asia-Pacific region shows high rates of resistance to the antibiotics most commonly used against it.

Azithromycin, which used to be the standard first choice, now fails a significant proportion of cases here. Resistance to moxifloxacin, a second-line antibiotic, is also rising. In some settings across the region, strains have been documented that no longer respond to either drug family. This does not appear in a generic travel health article, but it is clinically real for patients treated in Phuket.

If you receive treatment without knowing your strain’s resistance profile, there is a genuine chance the antibiotics will not work. Every failed course makes things harder to resolve.

Complications of Untreated Mgen

Left untreated, Mgen is not harmless. In women, it is strongly associated with pelvic inflammatory disease, a serious infection of the reproductive organs that can cause chronic pelvic pain, fallopian tube damage, and reduced fertility. In pregnancy, it has been linked to preterm delivery. These are documented complications, not rare edge cases.

In men, persistent untreated Mgen can lead to epididymitis, which is inflammation of the tubes around the testicles, and in some cases prostatitis. Neither is something you want to be managing months later when the original infection has become difficult to trace.

For long-stay expats in areas like Chalong or Cherng Talay who do not have a regular GP at home, an infection left undiagnosed through a long season can cause real damage before it is caught.

Treatment for Mycoplasma Genitalium in Phuket

Mgen is bacterial, so it can be treated with antibiotics. The problem in this region is choosing the right one.

Current guidance recommends a two-stage approach. The first stage is doxycycline for a week to reduce bacterial load. The second stage depends on the resistance profile of your strain: azithromycin for sensitive strains, moxifloxacin for resistant ones. Treating without knowing the resistance profile risks giving the wrong antibiotic entirely.

Self-treating with leftover antibiotics from a previous prescription is one of the worst things you can do here. I say this plainly because patients do it, especially those who are embarrassed to come in or running short on time before a flight.

How We Test for Mycoplasma Genitalium at Takecare Clinic Phuket

Testing requires a PCR test from either a first-catch urine sample or a vaginal swab. Vaginal swabs tend to have slightly better accuracy for women, and the physician will advise which is right for your situation. Results typically take two to three days.

At Takecare Clinic Phuket, you walk in without an appointment, speak directly with an English-speaking physician, and get the right sample taken that day. If the result is positive, the physician will look at the resistance profile and advise on the specific antibiotic course for your case, not a generic protocol written for somewhere else.

Confidentiality matters in a place like Patong, where the community is smaller than it looks. What you tell us stays between you and the clinic. You do not need to explain anything to a travel companion, a hotel, or an employer.

Test of Cure and What Comes After Treatment

Treatment is not the last step. A test of cure is recommended three to five weeks after you finish antibiotics. With resistant strains common in this region, treatment failure is a real possibility, and a follow-up PCR is the only way to confirm the infection has cleared.

Partner notification is part of this too. If you are a tourist and your partner has already flown home, that conversation still needs to happen. Your physician at Takecare Clinic can help you think through how to approach it practically, including for partners who have already left Phuket.

Mgen requires a full pathway: test, resistance-aware treatment, test of cure, and partner notification. That is the standard of care, and it is what we follow.

Who Should Get Tested for Mycoplasma Genitalium

If you have had unprotected sex with a new partner while in Phuket and have not specifically requested an Mgen PCR test, you have not been tested for it.

If you tested negative for chlamydia and gonorrhoea but still have burning, discharge, or pelvic discomfort, Mgen is the most likely explanation worth investigating. Do not wait another week to see if it settles.

If you are a long-stay expat or resident managing your own sexual health without a regular GP, Mgen screening should be part of your routine. The infection does not resolve on its own, with or without symptoms. You can walk directly into our STI testing service with no referral needed.

Is mycoplasma genitalium included in a standard STD test in Phuket?

No. Most Phuket clinics test for chlamydia, gonorrhoea, syphilis, HIV, herpes, and hepatitis. Mycoplasma genitalium requires a separate PCR test and must be specifically requested. At Takecare Clinic Phuket, we include Mgen testing as part of our sexual health screening with no appointment needed.

I tested negative for chlamydia and gonorrhoea after a night out in Patong but still have discharge and burning. Could it be mycoplasma genitalium?

Yes, and this is the most common way Mgen arrives in our clinic. The symptoms are clinically identical to chlamydia and gonorrhoea, and a negative result for both does not rule it out. A specific PCR test is the only way to confirm or exclude Mgen, and you should get one before the symptoms worsen or you fly home.

Can mycoplasma genitalium be treated with a single dose of antibiotics?

Not reliably in Southeast Asia. Single-dose azithromycin, which used to be the standard approach, now fails a significant proportion of cases in this region due to high resistance rates. Current treatment uses a two-stage protocol, and the right antibiotic depends on the resistance profile of your specific strain.

Can mycoplasma genitalium cause long-term damage if left untreated?

Yes. In women, untreated Mgen is associated with pelvic inflammatory disease, chronic pelvic pain, reduced fertility, and preterm delivery in pregnancy. In men, it can progress to epididymitis and prostatitis. These are documented risks, not rare worst-case outcomes, which is why testing matters even without obvious symptoms.

Do I need a follow-up test after mycoplasma genitalium treatment?

Yes. A test of cure three to five weeks after finishing antibiotics is the recommended standard, particularly given the risk of treatment failure with resistant strains circulating in this region. Takecare Clinic can arrange your follow-up test and partner notification support, including for partners who may have already left Phuket.

I am staying long-term in Chalong as an expat. Should I be screened for mycoplasma genitalium even with no symptoms?

If you have had a new sexual partner and have not specifically tested for Mgen, the honest answer is yes. The majority of carriers have no symptoms at all. Without a PCR test you cannot know your status, and without a regular GP at home, Phuket is the right place to get it sorted. Walk into Takecare Clinic and we will handle the full screen without a referral or appointment.