STI Screening: What a “Full Panel” Actually Covers

“I had the full panel” is one of the most common sentences in sexual health, and it almost never means what the person saying it thinks it means. There is no standard “full panel.” What you were tested for depends on where you went, what you were asked, and what you said.

This matters because the gaps are predictable. Two of the most common infections are routinely tested only at the sites people do not think to mention.

What a routine screen usually includes

A typical screen for someone with no symptoms covers four infections, and it is a reasonable place to start.

What is usually in, and what usually is not

Infection	In a routine screen?	What it takes
Chlamydia	Yes	Urine, or a swab from the relevant site
Gonorrhea	Yes	Urine, or a swab from the relevant site
HIV	Yes	Blood
Syphilis	Usually	Blood
Hepatitis B and C	Sometimes, depending on risk	Blood
Herpes	No, unless there are symptoms	A swab of a sore
HPV	Not as a standalone test for most people	Cervical screening, where applicable
Trichomonas, mycoplasma	Usually only with symptoms	Urine or a swab

The herpes row surprises people most. Blood tests for herpes are not recommended as routine screening, because a positive result in someone with no symptoms is difficult to interpret and frequently causes distress without changing anything.

The gap that matters most: where the swab was taken

Chlamydia and gonorrhea are site-specific. A urine sample tests the genital site and nothing else. If exposure has included oral or anal sex, throat and rectal swabs are the only way those sites get tested, and a substantial proportion of infections are found there and nowhere else.

Those swabs are not automatic. They are taken when the clinician knows to offer them, which depends on the sexual history being asked and answered. That conversation is the difference between a screen that means something and one that does not.

Timing: why testing too early gives a false answer

Tests do not detect an infection the moment it is acquired. They detect either the organism once there is enough of it, or your antibody response once it has developed. Both take time, and the interval differs by infection.

• Chlamydia and gonorrhea are usually detectable within one to two weeks
• HIV tests vary by generation; modern tests detect most infections within a month, and confirmation at three months is still standard practice
• Syphilis may take up to twelve weeks to become reliably detectable; see why syphilis testing matters again
• Hepatitis B and C also have windows of weeks to months; see what a positive hepatitis B test means
• A test taken the day after a specific exposure tells you about your status before that exposure, not after it

This is why a negative result is always dated. If there has been a recent exposure, the useful question is not “was it negative” but “how long after was it taken.”

Home testing kits have made screening far easier to access, and they are a genuine improvement on not testing at all. Their limits are the same limits as any screen: a kit tests the sites you sample, so a urine-only kit leaves the same gap a urine-only clinic visit does, and a positive result still needs a clinic for treatment and partner notification.

If something needs treating urgently, that is separate

Screening is for people without symptoms. Symptoms change the approach entirely: discharge, pain passing urine, sores, unusual bleeding or pelvic pain are reasons to be seen now rather than to book a routine screen.

Prevention is also a separate conversation. Our article on how PrEP works covers HIV prevention for people who test negative, and HIV treatment today covers what a positive result now means, which is very different from what most people assume.

How often, if you have no symptoms

Screening frequency is a risk question rather than a moral one, and the honest answer is that it depends on how many partners and what kind of sex, not on how careful you feel you have been.

• At least once for HIV for every adult, as a routine health measure
• Annually for anyone with a new partner in the past year
• Every three to six months where there are multiple or anonymous partners
• At each visit while taking PrEP, which builds screening in
• In pregnancy, where several infections are screened as standard; see infections and vaccines in pregnancy
• After any partner tells you they have tested positive, regardless of schedule

Nothing on that list requires a reason to be given. Asking for a screen is a routine request and clinics treat it as one.

Getting the most from the appointment

1. Say what kinds of sex you have had, including oral and anal — it determines which swabs are taken
2. Say when the most recent exposure was, so timing can be judged
3. Ask explicitly which infections are being tested for
4. Ask whether throat and rectal swabs are included
5. Ask how you will get the results, including negative ones
6. Ask whether a repeat test is needed because of timing

None of that requires disclosing more than you want to. It is clinical information, it is confidential, and it exists to make the test worth taking.

Telling a partner

If something is found, partners from the relevant period need testing and often treatment. This is the part people dread most, and it is the part clinics are most practiced at helping with — including anonymous notification, where a partner is told they should be tested without being told by whom.

Untreated, several of these infections cause lasting harm: pelvic inflammatory disease and infertility from chlamydia and gonorrhea, and the staged progression of syphilis. Reinfection from an untreated partner is also the most common reason a treated infection comes straight back.

You can reach us through the contact page, and our article on when to see an infectious disease specialist covers what a specialist assessment adds where infections recur or results are unclear.

Frequently asked questions