Rapid Strep Test (Strep Throat Testing)

A rapid strep test is a quick throat swab that checks whether a sore throat is caused by strep bac­te­ria, which need antibi­otics. It is done in the office or at imme­di­ate care, takes just sec­onds, and gives results in about 10 to 15 min­utes. There is no prepa­ra­tion and no recov­ery, and treat­ment can start the same visit.

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What is a rapid strep test?

A rapid strep test is a sim­ple, fast test that checks for strep, the bac­te­ria that cause strep throat. A provider swabs the back of the throat, and a small test device or strip looks for signs of the bac­te­ria, giv­ing an answer in min­utes. It is one of two com­mon strep tests: the rapid test, which is quick, and a throat cul­ture, which takes longer but can catch cas­es the rapid test misses.

Why is a rapid strep test done?

The test answers one impor­tant ques­tion: is this sore throat caused by strep, or by a virus? That mat­ters because strep is a bac­te­r­i­al infec­tion that is treat­ed dif­fer­ent­ly than most viral sore throats. Test­ing helps you or your child get the right care and helps avoid antibi­otics when they are not need­ed. Con­firm­ing strep also lets treat­ment start quick­ly, which eas­es symp­toms, low­ers the chance of spread­ing it, and helps pre­vent the rare com­pli­ca­tions of untreat­ed strep. For the symp­toms and treat­ment of strep itself, see the strep throat page, which cov­ers it in depth.

Rapid strep test vs. throat cul­ture: what’s the difference?

There are two ways to test for strep, and they often work togeth­er. Here is how they compare:

In short, the rapid test gives a fast answer, and a cul­ture is the back­up, espe­cial­ly for chil­dren, when a quick result comes back neg­a­tive but strep is still suspected.

How do I prepare?

There is almost noth­ing to do to get ready. No fast­ing, no med­ica­tions to stop, and no spe­cial steps; your child can eat and drink nor­mal­ly before­hand. It helps to bring a few details: when symp­toms start­ed, whether there has been a fever, and any known strep expo­sure at school or home. That is it.

What hap­pens dur­ing the test?

The test takes just a few sec­onds. A provider gen­tly rubs a soft swab over the back of the throat and the ton­sils to pick up a sam­ple. It can cause a brief gag, but there is no nee­dle, no numb­ing, and no pain. The swab is checked right there for a rapid result, and if a cul­ture is need­ed, the same kind of sam­ple is sent to the lab.

What do the results mean?

Results are straight­for­ward, and what hap­pens next depends on them:

• A pos­i­tive rapid test means strep is present, and your provider will pre­scribe antibiotics.
• A neg­a­tive rapid test means no strep was detect­ed. For chil­dren and teens, the provider often sends a throat cul­ture to be sure, since rapid tests can occa­sion­al­ly miss strep and the risk from miss­ing it is worth the extra step. If the cul­ture is also neg­a­tive, the sore throat is almost cer­tain­ly viral and will get bet­ter on its own.

Some offices use a new­er rapid mol­e­c­u­lar test that is accu­rate enough that a cul­ture back­up is not need­ed, even in chil­dren. Your provider will explain which test was used and the plan based on the result.

Are there any risks?

There are essen­tial­ly no risks. The swab can briefly trig­ger the gag reflex, which is unpleas­ant for a sec­ond but harm­less. There is no recov­ery and noth­ing to watch for after­ward; you or your child can head right back to their day.

Fre­quent­ly asked questions

How accu­rate is a rapid strep test?

Very accu­rate when it is pos­i­tive: a pos­i­tive result reli­ably means strep. It is a lit­tle less sen­si­tive on the neg­a­tive side, mean­ing it can occa­sion­al­ly miss strep, which is why chil­dren and teens with a neg­a­tive rapid test often get a throat cul­ture to con­firm. New­er rapid mol­e­c­u­lar tests are accu­rate enough that they usu­al­ly do not need a cul­ture backup.

Does my child need a throat cul­ture if the rapid test is negative?

Often yes, for chil­dren and teens. Because a rapid test can miss some cas­es and untreat­ed strep can rarely lead to com­pli­ca­tions, guide­lines rec­om­mend con­firm­ing a neg­a­tive rapid result with a throat cul­ture in kids. If your office uses a rapid mol­e­c­u­lar test, a sep­a­rate cul­ture may not be need­ed. Your provider will let you know.

Does the strep test hurt?

No. The swab touch­es the back of the throat for just a sec­ond or two and can make a child gag briefly, but it does not hurt; there is no nee­dle and no numb­ing. It is over almost as soon as it starts, and many kids are sur­prised by how quick it is.

Can I test for strep at home?

Home rapid strep tests exist, but for chil­dren it is best to test with a provider, who can swab cor­rect­ly, send a cul­ture if the rapid test is neg­a­tive, and start the right antibi­ot­ic if it is pos­i­tive. A neg­a­tive home test can give false reas­sur­ance. When in doubt, espe­cial­ly with fever and a very sore throat, get your child seen.

Where can my child get a strep test in Chicagoland?

Duly Health and Care pedi­a­tri­cians and imme­di­ate care cen­ters across the Chica­go sub­urbs offer rapid strep test­ing, often with results and treat­ment in the same vis­it. You can book a pedi­atric vis­it online, or use imme­di­ate care for a sore throat that comes up after hours or on a weekend.

Why choose Duly for strep testing?

A sore throat with a fever is one of the most com­mon rea­sons fam­i­lies come in, and a quick strep test takes the guess­work out of what to do next. Duly pedi­a­tri­cians, pri­ma­ry care providers, and imme­di­ate care cen­ters can swab, get a rapid result, con­firm with a cul­ture when need­ed, and start antibi­otics the same vis­it if it is strep, or reas­sure you when it is not. Either way, you leave with a clear answer and a plan.

With pedi­atric, pri­ma­ry and imme­di­ate care cen­ters across the Chica­go sub­urbs, plus easy online sched­ul­ing, get­ting test­ed and treat­ed is fast and simple.

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Med­ical­ly reviewed by Alli­son Crouch­er, DO · Last reviewed June 2026