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Doctor insights on: Is There Such A Thing As A False Positive Chlamydia Test

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Is there such a thing as a false positive chlamydia test?

Is there such a thing as a false positive chlamydia test?

Yes: All tests have both false positives (meaning you don't really have it) and false negatives (meaning you really do have it). Chlamydia testing is very accurate but yes a false test is possible. You can always requests a retest and the test can be done through a different lab for confirmation. ...Read more

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Chlamydia (Definition)

Chlamydia is a curable sexually transmitted infection that is caused by the bacteria chlamydia trachomatis. This bacteria infects mucous membranes of the urethra, vagina, cervix, anus, rectum, eyelid, and throat. Chlamydia may be asymptomatic but some patients experience pain or burning during urination, nausea, fever, vaginal discharge, ...Read more


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If you think you had a false positive chlamydia test, have already taken the medication to treat it, can you re-test or is it too late?

If you think you had a false positive chlamydia test, have already taken the medication to treat it, can you re-test or is it too late?

You can retest: If you have been treated with proper dose of antibiotics, chances are the test will be negative most of the time if treatment is successful. ...Read more

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What are percentages of false positive chlamydia test? Can swabs/samples get contaminated? I want to get retested because I don't believe it

What are percentages of false positive chlamydia test? Can swabs/samples get contaminated? I want to get retested because I don't believe it

False positives are: much rarer than false negative tests. No harm in re-testing, as long as you don't wait too long without treatment if you really need it. Chlamydia infection is women is usually asymptomatic, so you can have it without any symptoms. It is usually best to be on safe side and treat it. You can also infect your partner, so no sex until you get treated or get negative test. ...Read more

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Is it possible to receive 2 false positive chlamydia test results through a swab because of BV and nexplanon birth control?

Is it possible to receive 2 false positive chlamydia test results through a swab because of BV and nexplanon birth control?

No: If the chlamydial test was done in an appropriate culture media, swabbed properly, and sent to a approved laboratory, no. BV and Nexplanon have no impact on the quality of the test result. ...Read more

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Is a chlamydia test 100% accurate? How would you know if you have a false positive?

Is a chlamydia test 100% accurate? How would you know if you have a false positive?

90 - 95% accurate: However false positives do occur so that you can be retested & 2nd positive test would be definitive. You are free & clear if repeat is negative & 2 weeks have passed since encounter where you might have acquired it. ...Read more

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I tested positive for chlamydia, but my boyfriend tested negative in two different tests. Did I have a false positive?

I tested positive for chlamydia, but my boyfriend tested negative in two different tests. Did I have a false positive?

Not necessarily: It's common to find chlamydia in only one person in a couple. False pos tests are rare; probably your test is accurate but bf's tests maybe false neg. Or you had it first and he was not yet infected. Or he had chlamydia that cleared before he was tested. Or he could have been treated but not told you; or maybe an antibiotic for something else that cured his chlamydia. You both must be treated. ...Read more

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My fiance's test results came back neg. for chlamydia. Ive only been with him for 3 years, How possible is it that my test is a false-positive?

My fiance's test results came back neg. for chlamydia. Ive only been with him for 3 years,  How possible is it that my test is a false-positive?

Unlikely: The actual frequency of false positives and false negatives varies with the type of test, but in general, false negative Chlamydia test results are more common than false positives. I would believe your "positive" and treat it. If you two are sexually active, I would treat him, too, since his test may be false negative. ...Read more

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1 positive chlamydia test, then 2nd and 3rd were negative w/ swabs and urine to be sure as it didnt seem right. Advice on how false positives happen?

1 positive chlamydia test, then 2nd and 3rd were negative w/ swabs and urine to be sure as it didnt seem right. Advice on how false positives happen?

Type of test done: The most accurate and most common chlamydia tests use nucleic acid amplification and almost never are falsely positive. There is also a "DNA probe" test, less costly and still done by some labs, which sometimes give false pos results. However, even here the large majority of positves are true. If two partners have neg and pos results, usually the negative is false. Both partners need treatment. ...Read more

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Can a chlamydia test come back false positive?

Can a chlamydia test come back false positive?

I guess.: Laboratory errors are not unheard of; a repat test can clear up the confusion. ...Read more

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Ispossible to false negative test chlamydia after treatment? Tested positive, received treatment but retest 2 wks after b/c I felt I still had symptom

Ispossible to false negative test chlamydia after treatment? Tested positive, received treatment but retest 2 wks after b/c I felt I still had symptom

May be healing: The burning and some drip can persist for a few weeks after the microbes are gone. The testing also probably isn't altogether reliable. Yet another possibility is eating spicy stuff, especially those little peppers -- these can mimic chlamydial urethritis ...Read more

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Can you get chlamydia any other way besides sexual contact? Or is there a chance a chlamydia test can come out false positive?

Can you get chlamydia any other way besides sexual contact? Or is there a chance a chlamydia test can come out false positive?

Poss, not likely: Chlamydia is spread usually by sexual contact, but it is an organism and can be spread less commonly in other ways, like skin contact. If you get the highly accurate dna test, not too likely this is falsely positive, more likely you need to be treated. But if in doubt, i always say get another test! ...Read more

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No false results NAAT. 4 neg tests/retests for chlamydia before/during pregnancy. Now 2 positive after birth no sex of any kind at all between how?

No false results NAAT. 4 neg tests/retests for chlamydia before/during pregnancy. Now 2 positive after birth no sex of any kind at all between how?

A few possibilities: It is hard when people have one positive and one negative result on a test. Possible interpretations are: 1. The neg tests were false and the + test is correct 2. The neg tests were true and the + test is incorrect 3. Both are correct and you acquired it between tests. You and your doctor who know you can determine that best course of action. Consider testing your partner. ...Read more

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Can you get a false positive on a urine test for chlamydia?

Can you get a false positive on a urine test for chlamydia?

Very unlikely: Urine test for chlamydia has comparable sensitivity and specificity as cervical or urethral specimens which are high if NAAT was use as a test (Nucleic acid amplification tests (NAATs). ...Read more

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Can you get a false positive on a chlamydia test while being on biaxin (clarithromycin) antibiotics? Tk u dr!

Can you get a false positive on a chlamydia test while being on biaxin (clarithromycin) antibiotics? Tk u dr!

Nope: Clarithromycin (Biaxin®) cannot make a chlamydia test falsely positive. If you have a positive test while taking the drug, it means you have (or had) chlamydia. After cure of chlamydia with antibiotics, it takes 1-2 weeks for the test to become negative. However, clarithro has not been studied much against chlamydia. For more reliable treatment, ask your doc about azithromycin or doxycycline. ...Read more

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Is it possible that a chlamydia test could be false positive my partner isn't infected and he's the only one and I have BV and uti?

Chlamydia: Nope. The real common problem is false negatives. It is hard to get a positive when someone has the infection deeper than can be reached by the swab!. ...Read more

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Waited 7-10 post treatment. Now, how many days before I can take proof of cure (poc) test for chlamydia? Don't want false positive.

Waited 7-10 post treatment. Now, how many days before I can take proof of cure (poc) test for chlamydia? Don't want false positive.

Variable, but...: In general, repeat testing in 2-4 weeks after treatment. In reality, no test can gives a 100% sensitivity & specificity reflecting some inherent features of laboratory procedures, personal health/immunity, drug effectiveness, etc. Besides, many chlamydia-infected may go unnoticed due to lacking symptoms. More? Ask doc timely. More? Contact wwwlhealthtap.com/dr-Lin with RQPWJC to login. Best wish.. ...Read more

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I was treated for chlamydia on 3/16 with 1g azithromycin. I was retested on 4/7 and my test was still positive. Could this be a false positive result?

I was treated for chlamydia on 3/16 with 1g azithromycin. I was retested on 4/7 and my test was still positive. Could this be a false positive result?

Unlikely: The usual repeat testing and treatment interval per the Center for Disease Control is three weeks meaning that the test should have been negative by now unless you had incomplete treatment or were reinfected by a partner who wasn't treated. It is appropriate to be retreated because the risks of letting this go are far worse. ...Read more

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Good evening doctor. My partner of 4 years and I recently went to get tested for stds and he came up positive for chlamydia. I came out negative. He swears it's only been me for 4 years. Is there a possibility that the test could've been a false positive?

Good evening doctor. My partner of 4 years and I recently went to get tested for stds and he came up positive for chlamydia. I came out negative. He swears it's only been me for 4 years. Is there a possibility that the test could've been a false positive?

False Positive: No test is 100%. There will be false positives and false negatives. You can always get another test. That being said, if you both have been monogamous for the past 4 years why the tests? Just food for thought. Additionally, if you have had antibiotics recently it could gave cured any infection you had. Remember men usually have no symptoms. ...Read more

Dr. H. Hunter Handsfield
1,159 doctors shared insights

Chlamydia Infection (Definition)

A sexually transmitted infection caused by a bacteria. Genital symptoms include burning on urination, vaginal or penile discharge, pain with sexual intercourse or ...Read more