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Q: Why do you need a positive and negative in an ELISA test?
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How can you tell which is positive and which is negative on a speaker hookup?

Depending on colours of course black is usually negative and the other colour (generally red but depends) is positive. Get a D-cell Battery. Now get two pieces of speaker wire. hold one wire on the positive terminal of the battery and hold the other on the negative side of the battery. touch the wires to the positive and negative posts on the speaker. if the cone moves out ward the positive and negative are correct if it moves inward then the positive and negative are reversed (out of phase.) this simple test will allow you to see which terminal is which. Get a D-cell Battery. Now get two pieces of speaker wire. Hold one wire on the positive terminal of the battery and hold the other on the negative side of the battery. Touch the wires to the positive and negative posts on the speaker. If the cone moves outward the positive and negative are correct if it moves inward then the positive and negative are reversed (out of phase.) this simple test will allow you to see which terminal is which.


Can you have aids negative or positive?

Not exactly. "HIV positive" means that someone's test for HIV antibodies came back positive, i.e. that the antibodies are present and that the person has at least been exposed to, and is almost certainly infected with, the virus. AIDS, however, is a syndrome, or condition. There isn't a specific test for it, so the terms "positive" and "negative" have no real meaning. AIDS means that not only is the person infected, but the infection has progressed to the point that they are showing symptoms. You can be "HIV positive" (the test showed antibodies) or "HIV negative" (the test did not show antibodies), but not "AIDS positive" or "AIDS negative". Everyone with AIDS is (or should be, since HIV is the virus that causes AIDS) "HIV positive", but it's possible to be "HIV positive" for a considerable length of time before eventually developing AIDS.


What is the value of chi square test positive or negative?

There must be some value otherwise nobody would do them. On that basis, the value must be positive.


What if the pregnancy test is nor positive nor negative?

Make sure you peed on the strip then redo. if still neither you have a 50-50 shot.


If a function is negative at a test number it will reach zero before it reaches an asymptote?

Not necessarily. f(x) = -1-x2 is negative for any test value of x, it is asymptotically negative infinity, but it is NEVER zero.

Related questions

What is non reactive HIV test result?

Negative result. Take the Western Blot to confirm. A non reactive HIV test is a negative HIV test. There is no reason to confirm this with a Western Blot. Western Blots are only used to confirm a positive ELISA.


Can a positive pregnancy test turn negative?

No , but a negative test can be a false positive .


Can you test positive and test negative at the er?

It is possible to have inconclusive test results, but not to test both positive and negative at the same time.


The first test given to determine that presence of HIV?

The ELISA test is usually the first test given; quick results and inexpensive. See the related link.


Can your test come out positive then negative?

If it's a pregnancy test the answer is no, A test can come back negative even though its positive. But if it's positive, it's positive 99% of the time.


What test would be ordered after ELISA test shows a patient is HIV positive?

The Western blot test is used to confirm the results


If you are HIV positive is there a way you can do to test negative for a job?

It would be almost impossible to test negative if a person is HIV positive.


When testing for HIV a test produces more accurate results than the ELISA test?

The Western blot test is often used as a confirmatory test after a positive ELISA result for HIV. It is more specific but can also produce false positive results due to its high sensitivity. Consulting a healthcare provider for interpretation of test results and appropriate follow-up is important in HIV testing.


Negative pregnancy test but urinated on it again and it went positive?

This happened to me when I got pregnant with my third child. The first test was negative and the second positive. From what I understand, a pregnancy test can give a false negative but rarely gives a false positive.


What does it mean if you have an abnormal HIV blood test?

If the Elisa was abnormal/inconclusive, the lab will do a Western blot. If that's positive for antibodies to HIV, it means you've been exposed. if the Western blot is negative, you're in the clear.


What colour does a pregnancy test go when positive?

Pink- Positive Blue-Negative


How rare is it for a pregnancy test to come out positive when other are negative?

It depends on the levels which the test takes. Some tests are high sensitive where others need more hcg to bring up a positive result.