STD Testing Chiang Mai for 28 Infections: Comprehensive & Confidential Screening

STD Testing Chiang Mai for 28 Infections: Comprehensive & Confidential Screening

Written by Dr Deyn Natthakhet Yaemim, Founding Director, PULSE Clinic. Originally published 6 June 2015. Last updated 15 October 2026.

Taking control of your sexual health starts with clarity. Because many sexually transmitted infections (STIs) present no visible symptoms, it is surprisingly easy to carry or transmit an infection without realising it. Regular testing remains the only definitive way to know where you stand—and detecting an issue early ensures treatment is straightforward, protecting your long-term well-being.

Over the years, our medical team at PULSE Clinic has supported thousands of patients navigating their sexual health with confidence. For complete peace of mind, we provide the PCR 28 Multiplex test: an advanced screening panel that checks for 28 distinct pathogens using a single sample. Powered by Nucleic Acid Amplification Technology (NAAT), this method represents the international gold standard in diagnostic testing, delivering exceptional precision for infections such as chlamydia and gonorrhoea.

In this article, we break down how PCR DNA testing works, detail the 28 specific organisms detected, and help you determine the correct sample type for your needs. You will also find clear pricing details for our Chiang Mai clinic, alongside guidance on the optimal testing window. Please keep in mind that, while this panel offers remarkably broad coverage, it does not screen for HIV or Hepatitis B and C, which require separate blood investigations.

Whether you reside in Chiang Mai or are visiting the city, your consultation with us is entirely private. Expect a welcoming, non-judgemental environment where we always answer your questions with care. We are here to help, not to judge.

What is PCR testing for STIs?

PCR (polymerase chain reaction) is a type of nucleic acid amplification test (NAAT). It looks for the genetic material of specific bacteria and viruses in a sample and copies it many times, so even a very small amount can be detected.

PCR is widely used to diagnose infections such as chlamydia and gonorrhoea, and international guidelines recognise it as a highly sensitive method. This means it can find an infection that older methods, or tests that look for antibodies, may miss.

Which samples can be used?

Depending on your situation, your sample may be:

• Urine
• A swab from the throat, vagina, cervix, rectum or a skin sore
• A semen sample, where your doctor advises it

The right sample depends on the organism being investigated and where an infection may be. For example, a urine test cannot detect an infection that is only in the throat or rectum. Our doctors will help you choose the right site, based on the type of sexual contact you have had.

Can PCR results be positive after treatment?

Yes, this can happen. PCR can sometimes detect genetic material from organisms that are no longer alive. A positive result soon after treatment therefore does not always mean the infection is still active. Your doctor will explain your result in light of your symptoms and treatment history and will advise whether and when to repeat the test.

Comprehensive STD Screening Package Price at PULSE Clinic

• Prices are in Thai baht
• Price per one location of testing
• Online results will be available at PULSE Online Portal (POP) and the E-Doc mobile application
• For semen/sperm specimens, please avoid all sexual activity that results in ejaculating semen/sperm for 2 - 7 days before providing the sample.
• For PCR28 same-day results, the sample must be taken at the clinic before noon (12.30 p.m.).

Contact us at info.cnx@pulse-clinic.com or chat on your preferred platform:

Get an STD test in Chiang Mai

PULSE Clinic offers STD care in the central Chiang Mai Nimman area. Open daily for a consultation! Our staff will help guide you through the process of determining which tests are right for you, getting you tested and treated.

PULSE Clinic Chiang Mai Branch

Address: 30/2-3 Nimmanhaemin Road, Suthep Subdistrict, Mueang, Chiang Mai 50200

Tel.: +66 99 479 7168

WhatsApp: +66 99 479 7168

Line: 

Email Address: info.cnx@pulse-clinic.com

Opening Hours: Daily, 9.00 AM - 7.00 PM

You can either walk in for STD testing services or book an appointment in advance to avoid any long lines. The PULSE team will make sure you have a great experience, giving you the testing and treatment you need to stay healthy and enjoy your life. 

Why get tested if you have no symptoms?

Many people with STIs feel completely well. Infections affecting the throat, rectum or genital tract may go unnoticed, depending on the organism and the site of infection.

Testing when you have no symptoms can help you:

• Identify infections and access treatment when needed
• Reduce the risk of complications associated with untreated infections
• Inform partners when appropriate so they can seek testing and treatment
• Make informed decisions about sexual health and prevention
• Feel more confident about your next steps after a possible exposure

The appropriate testing schedule depends on your circumstances. A healthcare professional can help you choose suitable tests and timing.

Which 28 infections does the PCR panel detect?

Comprehensive STD Detection with Our Advanced PCR Multiplex Test for 28 Infections. Our STD PCR Multiplex uses cutting-edge technology to detect multiple infections in a single test. It screens for 28 different infections in various body locations, including

• Chlamydia Trachomatis (serovars A-K), which causes chlamydia
• Chlamydia Trachomatis (serovars L1-L3), which causes LGV or Lymphogranuloma venereum
• Neisseria gonorrhoeae, which causes Gonorrhoea
• Trichomonas vaginalis, which causes Trichomoniasis
• Mycoplasma hominis
• Mycoplasma genitalium
• Ureaplasma urealyticum
• Ureaplasma parvum
• Herpes Simplex Virus (HSV) type I
• Herpes Simplex Virus (HSV) type II
• Treponema pallidum, which causes syphilis
• Haemophilus ducreyi, which causes chancroid
• Cytomegalovirus (CMV) 
• Varicella-Zoster Virus (VZV)
• Candida albicans
• Candida dubliniensis
• Candida glabrata 
• Candida krusei 
• Candida lusitaniae
• Candida parapsilosis 
• Candida tropicalis 
• Atopobium vaginae
• Bacterial vaginosis (associated bacteria 2)
• Bacteroides fragilis
• Gardnerella vaginalis
• Lactobacillus
• Megasphaera Type 1
• Mobiluncus

We can detect these infections in the following areas:

• Throat and oral cavity
• Urethra (male & female)
• Anorectal area
• Vagina and cervix
• Sperm
• Skin lesions

What Test Is Right for You?

• For urethra and urinary tract infections, opt for the Urine PCR for 28 infections.
• To test for infections from oral sex, select the Throat Swab PCR for 28 infections.
• If you engage in anal sex without a condom, choose the Anal Swab PCR for 28 infections.
• For women engaging in vaginal sex, choose the Vaginal Swab PCR for 28 infections.

Important information about interpreting results

Some organisms that may be detected by multiplex panels, including Ureaplasma species, Mycoplasma hominis, certain Candida species, and Gardnerella vaginalis, can be present without causing symptoms or requiring treatment.

A positive result does not automatically mean you need medication. Your doctor will interpret the result alongside your symptoms, medical history, and the relevant clinical guidance.

Please note: This list reflects the PCR 28 panel described in this article. The exact number of reportable targets and organisms included in each panel should be confirmed against the current laboratory specification.

The panel does not replace blood tests for HIV, hepatitis B, or hepatitis C. Syphilis may also require blood testing, even if a molecular test is available for a particular specimen. Please tell our team if you would like a broader STI screening assessment.

Which sample should I choose?

The right sample depends on the type of sexual contact you have had, your symptoms, and the infection being investigated. Testing the right anatomical site matters because a urine sample may not detect an infection confined to the throat or rectum.

Not every panel can be used with every sample type. Please confirm that the selected PCR panel is validated for your intended specimen.

A throat swab may cause brief gagging, while a rectal swab may cause mild discomfort or pressure. Our trained staff can explain the collection process and help you feel comfortable.

How to give a urine sample

1. Register at the clinic and receive your sample container and instructions.
2. Follow the collection instructions provided by our staff.
3. If instructed, collect the first part of your urine stream rather than a midstream sample.
4. Secure the lid and place the container in the specimen bag.
5. Return the sample to our staff and confirm your contact details.

For the urine PCR test described here, please avoid urinating for at least one hour before your appointment, unless your clinician or laboratory provides different instructions. Fasting is not normally required for this test.

How long do PCR results take?

Turnaround times depend on the selected panel, sample type, laboratory processing, and the service you choose.

For the PCR 28 service described above, standard results are listed as available within seven days, with three-day, next-day, and same-day options subject to availability and additional fees.

For same-day results on the PCR 28 panel, the published instructions specify that the sample must be collected at the clinic before 12:30 p.m. Please confirm this cut-off with our team before your visit.

Results are sent to the email address you provide. You may also be able to access them through the PULSE Online Portal (POP) and the E-Doc mobile app, subject to the current service arrangements.

When should I get tested after exposure?

Every infection has a window period: the time between exposure and when a particular test can reliably detect the infection. Testing too early may produce a negative result even if an infection is present.

The appropriate timing depends on the organism, the type of test and the sample collected.

• Chlamydia and gonorrhoea: NAAT or PCR testing is commonly recommended around 14 days after exposure when screening for an asymptomatic infection. Your clinician may advise earlier assessment or repeat testing depending on your circumstances.
• Other organisms tested by PCR: Detection timing varies by organism and assay. Do not assume that one window period applies to every organism in a multiplex panel.
• HIV: The window period depends on the test used. A laboratory fourth-generation antigen/antibody test and an antibody-only test may detect infection at different times.
• Syphilis and hepatitis B and C: Blood-test timing varies by infection and test type. Follow your clinician's advice about the initial test and whether repeat testing is needed.

If you have symptoms, a known exposure or a partner who has been diagnosed with an STI, seek medical advice rather than waiting for a particular window period to pass. A clinician can help you decide whether to test now and when to repeat a test if necessary.

If a possible HIV exposure occurred within the past 72 hours, seek urgent medical assessment for post-exposure prophylaxis (PEP). PEP should be started as soon as possible when indicated.

How often should I be tested?

There is no single testing schedule that suits everyone. The right frequency depends on your sexual activity, number of partners, types of exposure, prevention methods, and previous results.

General considerations include:

• Routine screening: Consider regular STI screening if you are sexually active, particularly when you have new partners or have not been tested recently.
• Every 3–6 months: More frequent screening may be appropriate for people with ongoing exposure risks, including some gay and bisexual men and people with multiple partners.
• After a possible exposure: Ask a healthcare professional when to test and whether repeat testing is necessary.
• When symptoms develop: Arrange an assessment promptly rather than waiting for your next routine screen.
• After a partner's diagnosis: Seek advice about the appropriate tests, treatment and timing.

Screening recommendations also differ by age, pregnancy status, anatomical site and local clinical guidance. People who may benefit from screening for specific infections should discuss a personalised schedule with their healthcare professional.

What happens if my result is positive?

A positive result does not mean that you have to manage everything alone. Many bacterial STIs are curable with appropriate treatment, while other infections can be managed with medical care.

Your doctor will explain what the result means, whether treatment is recommended and whether additional testing is needed. You may also receive advice about notifying partners, avoiding transmission and arranging follow-up testing.

Some organisms detected by multiplex panels can be present without causing disease. This is why the result needs to be interpreted in context rather than assuming that every positive finding requires medication.

Your results and medical information are handled confidentially in accordance with applicable privacy requirements.

Why choose PULSE Clinic?

• Experienced medical team: Our team aims to provide clear explanations and respectful care without judgement.
• Multiple testing options: Ask about the available PCR panels and which organisms each one covers.
• Flexible turnaround options: Faster results may be available for selected tests, subject to confirmation.
• Confidential care: Our team can explain how results are delivered and accessed.
• Convenient appointments: Walk-ins and online booking may be available, depending on the branch and service.

Contact us at info.cnx@pulse-clinic.com or chat on your preferred platform:

Frequently Asked Questions (FAQs)

Do I need to book an appointment for an STD test in Chiang Mai?

Not at all! Walk-ins are always welcome at our Chiang Mai branch. However, if you prefer a seamless, minimal-wait experience, feel free to book online or message our team in advance. This allows us to confirm your preferred testing panel, prepare sample collection kits, and reserve your ideal time slot.

How should I prepare for my PCR test?

There is no need to fast—you can eat and drink normally before your visit.

Depending on the sample required:

• Urine Samples: Avoid urinating for at least 1 hour prior to sample collection.
• Semen Samples: Refrain from ejaculation (all sexual activity) for 2 to 7 days before providing your sample.
• Swab Samples: No special physical preparation is required.

Don't worry about memorising the details—our clinical staff will guide you through every step upon your arrival.

How soon after unprotected sex can I get tested?

The ideal testing window depends on the specific infection you wish to screen for:

• Chlamydia & Gonorrhoea PCR: Recommended 14 days post-exposure for optimal accuracy.
• HIV (4th Generation Test): Provides conclusive results around 45 days post-exposure.
• Syphilis & Viral Hepatitis (Blood Tests): Reliable detection typically requires up to 3 months.

Important Note: If you are currently experiencing symptoms or know you have been exposed to an STI, please do not wait for these window periods to pass. Visit our clinic for immediate medical evaluation.

Does the PCR 28 test include HIV or Hepatitis?

No, it does not. HIV, Hepatitis B, and Hepatitis C require separate blood investigations.

While the PCR 28 panel can detect the bacterium causing syphilis (Treponema pallidum) from an open skin lesion or swab, standard serology (blood testing) remains the most reliable method for routine syphilis screening. Our medical team can easily bundle all necessary blood tests and PCR panels into a single, convenient visit.

Is a urine PCR test just as accurate as a swab?

Yes, for urethral infections, a urine PCR test is exceptionally accurate—provided the sample is collected correctly.

However, urine tests cannot detect infections localised to other anatomical sites. Depending on your sexual history and exposure, our doctors may recommend throat or rectal swabs alongside urine collection to ensure complete coverage.

How long will it take to receive my PCR results?

Our standard turnaround time is 7 days. For patients requiring faster answers, we offer several express turnaround options (subject to additional fees):

• 3-Day Results
• Next-Day Results
• Same-Day Results (Samples must be collected at the clinic before 12:00 PM)

Your test results will be delivered confidentially to your designated email address. You can also securely access them anytime via the PULSE Online Portal (POP) or the E-Doc mobile app.

Will my test results be kept confidential?

100% yes. Patient privacy is our top priority. Your test results and clinical records are strictly confidential and accessible only by you through your private email and encrypted online portal. If you have specific privacy requirements or preferences regarding communication, simply inform our team during your visit.

Book your STD test in Chiang Mai

Taking care of your sexual health is a responsible and positive step for yourself and your partners. Whether you have symptoms, a new partner or a known exposure, or you simply want peace of mind, our team can help you find the right test.

Please contact PULSE Clinic to confirm the available PCR panels, sample types, prices, and turnaround times, or to arrange an appointment. Our team is here to support you in a confidential and non-judgemental environment.

Contact us at info.cnx@pulse-clinic.com or chat on your preferred platform:

Medical disclaimer: This article is for general information only and does not replace advice from a qualified healthcare professional. Testing and treatment decisions should be based on your individual circumstances and appropriate medical assessment.