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Doctor insights on: False Positive Thc Urine Test

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Positive HIV screener test at blood donation... Negative IFA and Negative NAT... False positive?

Positive HIV screener test at blood donation... Negative IFA and Negative NAT... False positive?

Yes: The initial screening test for HIV is very sensitive, but not very specific. The back up screening tests are much more specific for HIV. ...Read more

Urine (Definition)

Urine is the product of the kidneys, which is produced to eliminate the waste products of metabolism, manage body fluid balance, &maintain acid-base balance. The blood is first filtered by the kidneys, and the composition of the resulting fluid is then altered depending on the body's needs. It is composed of mostly water, and breakdown products from blood cells impart ...Read more


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Will an unrefrigerated urine sample cause an EtG test to test false positive?

Will an unrefrigerated urine sample cause an EtG test to test false positive?

No: ETG detects a metaboloite of alcohol. The modification occurs in the liver. If glucose is present in the urine that could get fermented into alcohol, but not into Etg as that requires an action by the liver. ...Read more

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Hcg 50 positive blood test two negative urine please help.

Hcg 50 positive blood test two negative urine please help.

Recheck blood: You need to have the blood levels checked again. You expect the level to about double in 2 days with a normal pregnancy. ...Read more

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False positive stress test reason?

False positive stress test reason?

Body habitus: Most common cause of false positive stress test is body habitus. This commonly affects women because the heart rhythm needs to be picked up through their breast tissue. ...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

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Mantoux test positive?

Mantoux test positive?

Work up needed: At the very least it may suggest that you have been exposed to tuberculosis. You should visit with your doctor to have questions asked about whether or not you have TB symptoms to suggest infection such as do you have a cough? Unexplained night sweats? Unexplained weight loss, fevers or chills and fatigue? You also need to have a chest x ray performed - since organism is usually inhaled. ...Read more

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Are false positive herpes test likely?

Are false positive herpes test likely?

No: A positive antibody means you're infected with herpes. That doesn't mean you're developing outrbreaks, but it does mean that you at least have latent herpes somewhere in your body. A positive culture or pcr for herpes means you have an active lesion. ...Read more

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Can miso soup cause false positive on etg urine test?

Can miso soup cause false positive on etg urine test?

No: If you have had a false positive for alcohol (ethyl glucuronide) or a drug abuse, and you know you did not use any drug, get a lawyer. Labs do make errors. There are a few problems with the ethyl glucuronide test. Or you may have an enemy who spiked your food. I'm sorry if this has happened. Good luck with this. ...Read more

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False posotive for drug test what can causr a false positive for THC on an institant drug test

False posotive for drug test what can causr a false positive for THC on an institant drug test

A lot of products.: A screening drug test is not perfect. A site i would recommend for a list of over the counter medications and the associated false positives is: http://www.Askdocweb.Com/falsepositives.Html. ...Read more

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Preg test positive but blood test negative missed period?

Preg test positive but blood test negative missed period?

Timing: It is possible that the urine pregnancy test detected HCG that was in the urine even as a pregnancy was failing (impending miscarriage) but by the time a blood test was done, the miscarriage had already occurred and the levels of the HCG pregnancy hormone were cleared. Alternatively, it could have just been a false (+) urine pregnancy test. ...Read more

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Does urine test show std?

Does urine test show std?

Not routine tests: Routine urine testing does not look for stds. However urine can be tested for gonococcal and chlamydia dna which are stds. ...Read more

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Positive quantiferon gold test but negative xray?

Positive quantiferon gold test but negative xray?

See below: It means that you have been exposed to tb. A chest x-ray that is positive would indicate either past or active infection. ...Read more

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Ana screen, ifa positive a (negative) means?

Ana screen, ifa positive a  (negative)   means?

Nothing by itself: One person in four tests positive. The vast majority of these people have no problems. The clinical picture is key, and how high the titer is may be helpful. ...Read more