STBBI stands for sexually transmitted and blood-borne infection — a term used mainly by Canadian and European public health agencies. It covers everything an STI covers (chlamydia, gonorrhea, syphilis, HIV, herpes, HPV, trichomoniasis) plus infections spread efficiently by blood contact, notably hepatitis C and hepatitis B. If you see “STBBI testing,” it simply means comprehensive STI testing that includes hepatitis screening.
Key Takeaways
- STBBI = STIs + blood-borne infections like hepatitis B and C grouped together.
- The term recognizes that some infections spread both sexually and through blood (shared needles, unscreened tattoos).
- Hepatitis C rarely spreads through sex alone but is a major blood-borne risk — which is why it belongs in the grouping.
- Public Health Agency of Canada materials use STBBI widely; U.S. sources mostly say STI.
- A practical STBBI-style panel = standard STI tests + hepatitis B and C blood screening.
Why Combine Sexual and Blood-Borne Transmission?
Several pathogens travel along both routes. HIV spreads through sexual fluid and blood. Hepatitis B is far more infectious through blood than through semen, yet it transmits readily during unprotected sex. Hepatitis C, historically a blood-route infection, is increasingly found among men who have sex with men, especially those living with HIV. Grouping them as STBBIs encourages clinicians to screen for all of them together instead of missing blood-borne risks during a purely “sexual health” visit.
Which Infections Are Considered STBBIs?
| Infection | Sexual route | Blood route |
|---|---|---|
| Chlamydia & gonorrhea | Primary | No |
| Syphilis | Primary | Possible (rare) |
| HIV | Yes | Yes |
| Hepatitis B | Yes | Yes (highly infectious) |
| Hepatitis C | Possible | Primary |
| Herpes & HPV | Skin-to-skin | No |
| Trichomoniasis | Primary | No |
What STBBI Testing Includes
A typical STBBI screen mirrors a full U.S.-style panel plus liver-virus coverage: NAAT urine or swab tests for chlamydia and gonorrhea, blood tests for HIV and syphilis, and hepatitis B surface antigen/core antibody plus hepatitis C antibody. If your previous testing never included hepatitis, adding it once is reasonable — many adults were never screened. Our testing process guide shows what each sample involves.
STBBI Prevention Overlaps Too
The combined framing shapes prevention advice: condoms reduce sexual transmission of nearly everything in the list; vaccination prevents hepatitis A and B and HPV; PrEP protects against HIV; and never sharing injection equipment blocks the blood route entirely. Treating an existing infection quickly — hep C is now cured in over 95% of cases with oral medication — stops onward spread regardless of route.
Frequently Asked Questions
Is STBBI just the Canadian word for STI?
Mostly yes, but slightly broader. STBBI explicitly folds in blood-borne infections such as hepatitis C, which a classic STI list may omit.
Do I need separate testing for STBBI vs STI?
No. Ask for a comprehensive panel that adds hepatitis B and C to standard chlamydia, gonorrhea, HIV, and syphilis tests. One blood draw typically covers everything.
Who should worry about blood-borne infections?
Anyone with past needle sharing, unregulated tattooing or piercing, blood transfusions before 1992, or partners in those categories. Routine one-time hep C screening is now recommended for most U.S. adults anyway.
Can hepatitis C be cured?
Yes. Modern direct-acting antivirals cure over 95% of hepatitis C cases in 8–12 weeks, according to WHO guidance — one of the biggest wins in modern medicine.