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Doctor insights on: Serologic Test For Syphilis

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Will STDs be detected in urinalysis, syphilis serology tests?

Will STDs be detected in urinalysis, syphilis serology tests?

Depends.: In an normal urinalysis they do not test for stds. But you can use the same urine sample to test for chlamydia or gonorrhea. When they take blood for the syphilis test, the can also test for HIV and hep c, but not for chlamydia or gonorrhea. In summary, to have a "full std panel", you need to give both blood and urine. ...Read more

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Dr. Hunter Handsfield
537 doctors shared insights

Syphilis (Definition)

A sexually transmitted infection that can cause serious health problems if ...Read more


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Can RPR test for syphilis give false negative?If syphilis is highly suspected should I retest for it ?

Can RPR test for syphilis give false negative?If syphilis is highly suspected  should I retest for it ?

Prozone effect: False (-) in RPR syphilis testing occurs when there is a prozone effect. Why? It's because the concentration of syphilis antibodies is so high, it interferes with the antigen-antibody interactions that result in a (+) reaction. A false (-) result can also occur during primary syphilis since not enough time has passed to allow high enough antibody levels for a (+) reaction to occur. ...Read more

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Can an HIV antibody screening test be positive but the western blot negative?

Can an HIV antibody screening test be positive but the western blot negative?

Yes: There are 2 reasons for this kind of result: (1) a false positive, or (2) early infection before seroconversion. In someone at low risk for HIV without symptoms, another negative WB in 1 month means there's no infection. In someone at risk or with symptoms of acute infection, a viral load can be helpful. The new 4th generation antigen/antibody tests will eliminate this problem. ...Read more

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Can a vdrl test detect hiv?

Can a vdrl test detect hiv?

VDRL is for syphilis: No - HIV testing is a separate test. VDRL is a test for syphilis. If you've had an exposure, you might be getting tested for multiple diseases. Hopefully your doctor explained that... It's always good to be safe -that's the best key to health. Syphilis is treatable and can be cured. HIV can be well managed with daily medicines, but can be fatal over time if not diagnosed. Hope this helps. ...Read more

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Would HPV cause a false positive HIV ELISA test?

Would HPV cause a false positive HIV ELISA test?

It shouldn't: Hpv shouldn't cause a false positive elisa. But see what the follow up western blot shows. ...Read more

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Would ghonnorea or clamidia cause false positive HIV ELISA test?

Would ghonnorea or clamidia cause false positive HIV ELISA test?

Possible: The elisa test can be affected by different infections, causing a false-positive result. After any positive elisa, a follow-up test is performed by a 'western blot' which takes longer to perform, but gives a more sensitive answer. If you or someone you know had a positive HIV by elisa, they absolutely need the follow-up testing (including a full std/sti work up). ...Read more

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Does a Positive ANA Antibodies, IFA test mean I could have an STD? What STDs are Positive ANA test? Is an ANA Antibody test a standard test for STDs?

Does a Positive ANA Antibodies, IFA test mean I could have an STD? What STDs are Positive ANA test? Is an ANA Antibody  test a standard test for STDs?

Antinuclear antibody: Antinuclear antibody testing is useful for someone with signs and symptoms of an autoimmune disease - anemia, arthritis, kidney disease, inflammation of the heart and lungs. It is not a test for STDs. However, a test for syphilis, the VDRL, was once used as a test for autoimmune disease! Please call your doctor to explain your ANA. Usually they are of no medical significance. ...Read more

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Is RNA PCR test for HIV accurate?

Is RNA PCR test for HIV accurate?

Yes: The nucleic acid test for HIV becomes positive about 20 days after exposure to the virus. ...Read more

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What can cause false positive ELISA HIV tests?

What can cause false positive ELISA HIV tests?

Unknown: There is not any real or valid answer to this. It is unknown. The only known reason would be previous participation in a specific HIV vaccine trial where some form of antibody response. But in one who have not so participated the answer is unknowable. ...Read more

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Can syphilis cause a positive ANA test?

Can syphilis cause a positive ANA test?

No: However lupus can cause the screening test for syphilis (the rpr) to be falsely positive. ...Read more

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What is a tpha quantitative blood test? Can this test detect latent stage syphilis?

What is a tpha quantitative blood test? Can this test detect latent stage syphilis?

Yes it can: The TPHA test (Treponema pallidum hemagglutination) is a confirmatory test for syphilis. Usually it is done only after a positive screening test, such as the VDRL, RPR, or an EIA test. If you have had negative results on one of these plus the TPHA, you can be 100% certain you don't have syphilis and probably never did. ...Read more

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Can negative test results be trusted for a prostitute with HIV antibody rapid test and HIV duo test?

Can negative test results be trusted for a prostitute with HIV antibody rapid test and HIV duo test?

Not necessarily: If the person just acquired the infection, she or he may be carrying the virus that will not be detected by either antibody or antigen tests. Testing for viral nucleic acid is the earliest way to detect HIV infection. ...Read more

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Tested positive for Lyme disease IgM but my western blot test came back negtive?

Tested positive for Lyme disease IgM but my western blot test came back negtive?

Then it's not Lyme: Lyme disease can be tricky -and you want to make sure you see someone like an Infectious Diseases doctor who knows how to treat it. The diagnosis is actually based on clinical findings, and the lab testing is generally 'supportive'. Since you're Western blot is negative, then it's very unlikely you have Lyme. There are other diseases that could cause 'Lyme-like' symptoms -and good to get evaluated ...Read more

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How could syphilis test be negative and anticardiolipin autoantibody be positive? Do some syphilis tests only look for antibodies to t. Pallidum?

How could syphilis test be negative and anticardiolipin autoantibody be positive?  Do some syphilis tests only look for antibodies to t. Pallidum?

Different types of: Tests. There are two different types of tests, one being RPR and it has more false positives due to auto-antibodies. Tests specific for treponemal antigens are more specific. ...Read more

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Can ANA test be false negative for lupus?

Lupus: Has specific criteria for diagnosis, ANA is just one of them and canot be relied on by itself for a diagnosis. ...Read more

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What causes false positive HCV antibody test results?

What causes false positive HCV antibody test results?

Misinformed?: Who told you that your hep c test was false? If you have no viral load that means you cleared an infection. Are you sure you are getting the right advice? ...Read more