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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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is there such thing as a false positive pregancy test

is there such thing as a false positive pregancy test

False + pregn. tests: There is such a thing as a false positive urine pregnancy tests; there are lab errors; there a disorders of the liver, ovaries and other organs which can produce HCG or molecules similar to HCG; there are some molecules which may interfere with the pregnancy test performance or some reactives...False positive blood pregnancy tests may also occur but are much rarer. ...Read more

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Is there such thing as a false positive ive heard of a false negative if a test is positive its means pregnant right?

Is there such thing as a false positive ive heard of a false negative if a test is positive its means pregnant right?

Statistics: There are few, if any, tests that are 100% accurate. We measure accuracy by considering a test sensitive or specific. A highly sensitive test rarely misses a condition (few false negatives). A highly specific test rarely mistakes another condition for the one it's testing (few false positives). Repeating the test, with a different kit, will help raise the accuracy of your finding. ...Read more

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Is it true that the qualitative blood hCG test is as good as a urine test? It only tests positive with a 25mlu?

Is it true that the qualitative blood hCG test is as good as a urine test? It only tests positive with a 25mlu?

Probably close: The modern upt is very sensitive. 25mlu is very low, like just after implantation ( i'm not sure how long but just a couple of days. I recommend people skip the period before the upt, however. Otherwise you can be chasing it too hard causing extra stress. Pregnancy rates are about 10-20% per month; good luck with everything. ...Read more

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Is a viral culture as accurate as a blood test for hsv2?

Is a viral culture as accurate as a blood test for hsv2?

It depends...: Both types of test have pro and cons. When there is an active, fresh outbreak less than 2-3 days in duration, culture (or even better, a PCR test for HSV DNA) is generally best. When no lesions are present, or if healing and culture or DNA is negative, blood test is the only option. However, the blood tests aren't perfect; some positive results are false, especially if only weakly positive. ...Read more

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If there is a cross- reactivity during an elisa test is it possible to end up with a false negative as a result?

If there is a cross- reactivity during an elisa test is it possible to end up with a false negative as a result?

False positives: Cross-reactivity can cause false positives (meaning that the test is positive but the actual substance tested for isn't there). The happens when an antigen (virus, protein or bacterium) is so similar structurally that it reacts with the same antibody that the test is designed for. For example, the antibody test for latex allergy can sometimes cross react with a protein in bananas! Crazy, huh? ...Read more

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Is a urine HIV test just as effective as a blood HIV test?

Is a urine HIV test just as effective as a blood HIV test?

No: Probably less sensitive. I'd want a blood test, but would accept an oral fluid test. ...Read more

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Is there anything that could cause a false positive drug test for fentanyl?

Is there anything that  could cause a false positive drug test for fentanyl?

No: Conventional urine drug screens (uds) look for metabolites from naturally occurring opioids (like morphine and codeine), but fentanyl is a synthetic opioid which is metabolized to different products. These products are not picked up by uds. ...Read more

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Is a urine test as effective as a blood test for chalmadya my partner tested slightly positive for chalmadya in a blood test

Is a urine test as effective as a blood test for chalmadya my partner tested slightly positive for chalmadya in a blood test

Test for different : Items. A positive blood test tells that a person was infected at one time, not necessarily infected at the time of the test. A urine test looks for the actual microorganism and if positive means that the person is currently infected. ...Read more

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Is it a really high chance a positive test for amphedimine and a week later benzodiazepine be false positives?

Is it a really high chance a positive test for amphedimine and a week later benzodiazepine be false positives?

Low chance: So there was a positive test for amphetamines, and then a week later for benzodiazepines. You wonder about the chances that both could be false positives. The chances would be quite small. ...Read more

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What causes a chlamydia test to be a false negative?

What causes a chlamydia test to be a false negative?

It's just random: Tests miss 5-10% of infections, more by urine, less by urethral or vaginal swab. Maybe other possibilities as well. Chlamydia clears on its own in a few weeks to months, so current testing is negative. Or s/he received an antibiotic for chlamydia (and didn't admit it) or for another infection, curing chlamydia or interfering with the test. Partner(s) of infected person need Rx, even w/ neg tests. ...Read more

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How typical is a false positive on a pregnancy test?

How typical is a false positive on a pregnancy test?

Rare.: Pregnancy test focus more on getting positives right when they say they are positive. Nevertheless it happens, blood pregnancy tests and urine pregnancy tests performed in doctors office may be a better second step if in doubt. ...Read more

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If SED rate is over 140 could it be a false positive? Is a false positive common?

If SED rate is over 140 could it be a false positive? Is a false positive common?

Terminology: Sed rate is an observation and is not diagnostic of any disease, so in that sense, it can not be false positive. High Sed rate is usually an indication of inflammation. ...Read more

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Is it possible to get a positive pregnancy test followed by a negative one?

Is it possible to get a positive pregnancy test followed by a negative one?

Yes.: If the test is done improperly you can get any result. If you were pregnant and had a spontaneous miscarriage it may change. ...Read more

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Can overidrel give false positives even in a blood test it would be a week since conception i had positive tests as well as a blood test n a negative?

Can overidrel give false positives even in a blood test it would be a week since conception i had positive tests as well as a blood test n a negative?

Please clarify: No, Ovidrel will not give a false positive. To give you the best answer possible, i would need clarification of your statements. You imply that the urine tests were positive, but the blood test was negative? ...Read more

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Are there medications that would give a false positive in a hair strand test for THC?

Are there medications that would give a false positive in a hair strand test for THC?

Look up Protonix (pantoprazole): (pantoprazole sodium). OTC cold medications often trigger positive drugs tests for amphetamines. And, in the non-medication arena, don't eat Hemp Salad Oil. Had a government employee who loves the stuff turn up positive for cannabis and got referred to a psychologist (me). It was nice talking to him but he needed a change in diet, not rehab... ...Read more

Dr. H. Hunter Handsfield
1,171 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