NO, in this instance the control line did not show up, therefore the test is invalid. For a positive test, only the control line will be visible. Check the cross-reactant guide under the heading of METHAMPHETAMINE and look for the possible cross-reactant drug. Pseudoephedrine is listed as a possible cross-reactant for Methamphetamine. Retest the person 4-5 days after they have not taken the medication.

It is possible to get a false positive test result. This happens when a doctor or laboratory has not performed a confirmatory antibody test before giving people their results. When a person has an antibody test, the lab usually runs two different kinds of tests. One is called an EIA test which is highly sensitive. It can sometimes overreact, so a positive result with the EIA is usually followed up with a RIBA test which is a sophisticated, highly-specific, antibody test. See similar questions...

A positive test result may mean that your dog has bladder cancer. However, there are conditions other than bladder cancer that can cause a positive result. A positive test result will be used in conjunction with signs, symptoms, and possibly other diagnostic tests such as ultrasound to make a definitive diagnosis for your dog. See similar questions...

Unlike home pregnancy tests where a line in the result window indicates a positive, OPKs are only positive if the test result line in the same color or darker than the reference line. Refer to the instructions in your test kit to be sure you know which window is which, and whether the line has to be as dark (Clearplan) or darker (OvuQuick). See similar questions...

NO! These tests are unlike pregnancy tests. The results are only positive if the test line is equal to or darker than the control line. There are some women who will ovulate without getting a "true" positive. Some women will only have a nearly positive test. If you see a nearly positive test, it MAY be a good idea to have intercourse because ovulation will probably occur soon. See similar questions...

Yes, a false positive test means the test looks as if it is positive, but it is really negative. This happens more often in people who have a low risk for the disease. It is important to confirm the test result a second time. See similar questions...

Refer to your Drug Free Policy for guidelines on adulterated specimens. We recommend not to interpret the drug test results and either retest the urine or collect another specimen. 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...

individual with two copies of the risk variants will receive a positive result for deCODE MI™, and those with only one or no copy of the risk variants will receive a negative result for the test. Back to top of page See similar questions...

A positive test does not mean that your child has TB. Your child will be referred to the RISE TB Clinic for a chest x-ray and further medical evaluation to determine if they need treatment. All care at the RISE clinic including tests (e.g. x-rays) and treatments (e.g. medications) are paid for by the Department of Health. The school nurse and the Department of Health staff will help arrange your appointments at the RISE clinic. See similar questions...

Perhaps the most common excuse subjects give to explain their positive marijuana test might be, "I was around some people who were smoking pot." Research has shown, however, that casual exposure to marijuana smoke will not produce a positive test. A person really has to work at being exposed to "passive" smoke to create a positive test. See similar questions...

It depends on the poppy seeds. Evidently some poppy seeds are more potent than others, and eating just one or two rolls containing potent poppy seeds may result in a positive opiate test. But other rolls containing less potent poppy seeds may have no effect on a drug test. New confirmation procedures are being discussed that will be able to discern between drugs such as heroin and poppy seeds, therefore eliminating the possibility that poppy seeds could cause a positive test. See similar questions...

Prompt medical care may delay the onset of AIDS and prevent some life-threatening conditions. A licensed health care provider with experience in treating HIV should be seen, even if there are no symptoms. There are now many medications to treat HIV infection. A TB (tuberculosis) test should be done. TB infection can be present with­out showing any symptoms. Undetected TB can cause serious illness, but it can be successfully treated if caught early. See similar questions...

You will need to obtain a chest x-ray and be evaluated to determine if you have active Tuberculosis. Chest xrays will be provided at no cost; referral will then be made to your private health care provider or to a health department clinic. See similar questions...

Only a pink test line indicates a positive result. A gray or green test line could indicate an improper sample extraction, improper test procedure, or invalid strip. Please call Tech Service for troubleshooting if this result is reached. See similar questions...

Some women have a fade-in pattern where the test will get darker for a day or two before the positive result. This generally isn't anything to worry about, and may have the benefit of a bit of advanced noticed. If you find you have a fade-in pattern, you should begin having intercourse when the fade-in pattern starts. See similar questions...