Nonreactive indicates that the serum tested does not have detectable antibodies to HIV-1. There are several reasons for this: Person is in the window period immediately after infection when antibodies are not yet being produced. Person is in the final disease stages when the immune system is no longer capable of producing detectable antibody. See similar questions...

Generally, reactive means positive for the presence of the analyte being detected in a test system and nonreactive means negative for the presence of the analyte being detected in the test system. See similar questions...

It is important to bear in mind that common diseases, such as atrial fibrillation and stroke, occur as a result of the interplay of both environmental (including lifestyle and other health and medical conditions) and inherited risk factors. As a result, having a specific genetic risk factor for a common disease does not mean that one will necessarily develop the disease; and not having a certain risk variant does not eliminate the possibility of developing the disease. See similar questions...

It is very important to realize that because there are a number of risk factors of atrial fibrillation, including both genetic and lifestyle/health factors, receiving a negative result for the deCODE AF? test does not mean that one is at low or no risk of AF. Back to top of page See similar questions...

There are 4 possible test results: "negative", "positive", "indeterminate", or "result not available." A "negative" test result means antibodies to the hepatitis C virus were not found in your test sample and it is extremely unlikely that you have been infected with the hepatitis C virus. See similar questions...

When you receive your test results, you will see a table with a string of numbers in the boxes. Each number represents one of the markers on the strand of y-DNA that was tested. Now you want to understand what these numbers mean in comparison to other people's test results. There are several possible results. See similar questions...

It means a laboratory could not confirm the presence of Hepatitis C antibodies in a particular blood sample. It could mean that an individual may be in the process of converting from being negative to being positive. It could also be due to other medical factors. In either case, it is recommended that the individual be re-tested. See similar questions...

In 2-5% of individuals who have recently received an influenza vaccination, there may be a temporary false positive EIA. See similar questions...

An insufficient blood result refers specifically to the Home Access® Hepatitis C Check Test system. It means that the Hepatitis C test could not be performed on the blood sample that was sent to the laboratory. This happens most often because there was not enough blood to test, there were white spots in the circle, or the blood did not soak through all the way to the back. See similar questions...

If a person types your web site address, or the URL to any particular page within your web site, directly into their browser's address bar, or if your site is their homepage when they open the browser, there will not be a referral for that visit because the visitor is not coming from someplace prior to hitting your site, they are coming directly to your site. There are also some scripts that can be used to block referral information when a visitor navigates from one web site to another. See similar questions...

The most commonly used syphilis tests screen for an antibody to the syphilis organism. Lupus patients sometimes have a very similar antibody. This similar antibody, the antiphospholipid antibody (aPL), can cause an incorrect positive result on a syphilis test. If the doctor suspects that the patient may not really have syphilis, he may choose to then run a different, more complicated and expensive test that checks specifically for the syphilis organism. See similar questions...

NO! OptiGen test results are meant to be used in a responsible breeding program. This does not mean that carrier or affected dogs should never be bred. It does mean that carrier and affected dogs with other desirable traits can be bred, but only to a certified, genetically “Normal/Clear" dog in order to prevent the genetic disease. We can't make specific recommendations about how people should handle their dogs. See similar questions...