1,25-dihydroxyvitamin D (calcitriol)
This test measures 1,25-dihydroxyvitamin D, the biologically active form of vitamin D. It is used to investigate calcium imbalance, kidney disease and...
MSM1 STI
280.00
The MSM1 STI profile provides comprehensive sexual health screening across blood, urine, throat, and rectal samples. It is designed for accurate detection of common sexually transmitted infections.
Turnaround time
Results available 2 days after arrival in lab. Doctor's report sent the day after results available (if required)
Biomarkers count
5
Same-Day Appointments
UKAS Accredited Labs
Book your test
Under 18? Patients under 18 can only be seen at GB Medlabs and Clinilabs, Monday to Friday only.
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Details about MSM1 STI
What is the MSM1 STI Screening Profile?
The MSM1 STI Screening Profile is a comprehensive sexually transmitted infection test designed to detect infections that may affect different anatomical sites. It combines PCR testing for chlamydia and gonorrhoea with blood-based serologyfor HIV and syphilis.
By testing multiple sites rather than urine alone, this profile increases detection accuracy, particularly for infections that may be present in the throat or rectum without symptoms. It is aligned with best-practice sexual health screening standards.
Why do I need an MSM1 STI Screening Profile?
Many sexually transmitted infections cause few or no symptoms but can still be transmitted or cause long-term complications if untreated. Site-specific testing is essential for accurate diagnosis.
You may benefit from this test if you:
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Are sexually active with multiple partners
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Engage in oral or receptive anal sex
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Have had unprotected sex
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Want routine sexual health screening
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Have a new sexual partner
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Have been notified of potential exposure
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Have symptoms at any anatomical site
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Require reassurance after recent sexual contact
Comprehensive screening helps detect infections early and reduces onward transmission.
Benefits of the test
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Multi-site STI detection
Tests urine, throat, rectal, and blood samples. -
High-sensitivity PCR testing
Accurate detection of chlamydia and gonorrhoea. -
Includes key blood-borne infections
Screens for HIV and syphilis. -
Detects asymptomatic infections
Many infections are silent without testing. -
More comprehensive than urine-only testing
Reduces false reassurance. -
Single coordinated screening profile
Covers the most relevant STIs in one test. -
Supports sexual health responsibility
Helps protect partners and communities. -
Suitable for routine and risk-based screening
Can be repeated as needed.
Step-by-step: How we offer testing
Clinic-based testing (UK-wide)
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Choose your nearest UK clinic
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Urine sample provided
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Throat and rectal swabs collected
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Blood sample taken by a clinician
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Samples sent to the laboratory for analysis
Home or hotel testing (+£60, UK-wide)
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Home collection kit provided where appropriate
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Blood sample collected by a mobile phlebotomist
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Swabs and urine collected with clear instructions
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Samples returned for laboratory testing
Your results explained
Negative results
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No STI detected at tested sites
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Suggests no evidence of current infection
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Routine re-testing may still be recommended based on risk
Positive results
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Infection detected at one or more sites
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Indicates active or recent infection
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Supports prompt treatment and partner notification
Some infections may be site-specific and not present elsewhere.
How It Works
Simple steps to get your results
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Book Online
Choose your test online and book in seconds. Select your preferred clinic location or home visit option.
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Visit or Test at Home
Attend one of our UK or London clinics, arrange a home nurse visit, or use a finger-prick kit where available.
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Get Your Results
Your sample is analysed by accredited UK laboratories, with secure results delivered directly to you.
Take control of your health with London Blood Tests
WhatsApp UsHow to Prepare for Your Test
Follow these guidelines for accurate results
Sample Timing
Where possible, attend your blood test between 7am and 12pm. Please wait until any short-term illness or infection has fully resolved before testing. Avoid intense exercise for 24–48 hours beforehand, as this can affect certain markers.
Fasting & Hydration
Fasting is not always required, but some tests may recommend it. If fasting is advised, avoid food for 8–12 hours before your appointment and drink water only. Stay well hydrated, as this helps with sample collection and accuracy.
Medications & Supplements
Continue prescribed medications unless advised otherwise by your clinician. Avoid vitamin, mineral, or biotin supplements for at least 24–48 hours before your test, as these can interfere with results. If you are unsure about any medication or supplement, please let us know before your appointment.
Hormones & Menstrual Cycle
For hormone-related tests, timing within your menstrual cycle may be important. If relevant, follow any specific guidance provided on your test page.
If you have any questions or special circumstances, our team is happy to advise before your appointment.
Frequently Asked Questions
Infections can exist at these sites without symptoms.
No, it can miss throat or rectal infections.
Yes, many STIs are asymptomatic.
Yes, especially for sexually active individuals.
It detects established infection via serology.
Yes, site-specific infection is common.
PCR is highly sensitive and specific.
Yes, based on sexual activity and risk.
Yes, partner testing is strongly recommended.
It confirms infection and supports appropriate treatment and follow-up.
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