Do not attempt to interpret results after the five minute test reaction time. Depending on the concentration of hCG in the test specimen, positive results may be observed in as little as 40 seconds. However, to confirm negative results, the complete reaction time of 5 minutes is required. A positive result can only be determined within this time interval.

Urine drug test may have picked up an over-the-counter medication or prescription. The confirmatory test will determine the difference in the substance detected.

Yes. If you have a cat which tests positive on the ELISA test, you should immediately have an IFA test done. If it tests negative on the IFA test, you should have your cat retested with the ELISA test in 3 months. If a cat does not test negative again in roughly three months, chances are it will always test positive. Vets and virologists have devised an entire classification scheme of the different types of infected cats (transiently infected, persistently infected, etc.

To increase the chance of conception, it is best to have intercourse the day of the LH surge as well as following three days after. A faint line (or a faint positive test band) does not indicate a positive result for an LH surge. While the presence of a faint line on a pregnancy test may indicate a positive result, a faint line on an OPK is always negative. Please refer to the images on our instruction pages to interpret results.

Unfortunately, yes. Although false negatives are not very common, they do occur, because no test is 100% accurate all of the time. Unlike FIV, FeLV tests test for antigens, not antibodies, so maternal antibodies are not an interfering problem and kittens can be tested at any age. To be absolutely sure a cat is not FeLV+ you should test it twice, a few weeks apart (the cat should remain isolated from other cats during this period; too, otherwise there is little point in doing a second test).

It is still recommended that the plasma metanephrine test be performed to confirm or eliminate the diagnosis of pheochromocytoma, particularly if the symptoms are episodic. The 24 hour urine tests are not always successful at picking up intermittently secreting tumors. Symptoms vary greatly with each patient. Sterotyped textbook cases of Pheochromocytoma are rare. Symptoms can include:

Mixed test results means the FSH level in your body is not consistently high. Because your FSH levels are changing, your may be in perimenopause. Consider repeating the test in 6 to 12 months. Talk to your doctor about your test results if you have concerns about your health.

False negative results are more common than false positives - and are primarily due to inaccuracies in timing of the test or carelessness in the test procedure itself. Please follow test instructions with circumspection and precision. A false negative result can also stem from using a diluted urine sample and/or from taking a test too early in pregnancy. First morning urine contains the most concentrated presence of hCG - which makes it the ideal sample for pregnancy testing.

With Autosomal Dominant PKD, the only form of PKD so far identified and confirmed in cats, two genetic negative parents cannot produce a genetically positive offspring unless that offspring is a fresh mutation. See the discussion on autosomal-dominant inheritance below for further details.

It is of the utmost importance to your life that you seek out a doctor qualified to treat this disease. Your doctor will guide you to counseling, support groups and assistance services specifically for people that are HIV positive. You should also discuss the necessary changes to your life-style so as to not further endanger yourself and others. Your life is not over. You can live a longer, more fruitful life if you seek and receive treatment early in the disease process.

There are many things you can do to help protect your health if you test positive for HIV. Seeking health care early and maintaining a healthy lifestyle can help a person stay healthy. Some specific things you can do if you're positive for HIV are: See a doctor, even if you feel well. If possible, see a doctor who is familiar with treating people with HIV. Health care providers can inform you on what tests and drug treatment are right for you.

Should the test be negative it is extremely important that you read and understand the following: There is a period of time (TWENTY-EIGHT DAYS prior to the test) that the AIDS virus is invisible to not only Discreet, but to the ELISA and Western Blot HIV antibody tests as well.

Yes, because it takes some time for your body to produce Hepatitis C antibodies, there is a period of time when recent infections may not be detected.

If you are pregnant, have recently been pregnant or have reached menopause, you may get a misleading result. This may also be true if you are taking fertility drugs or are receiving injections which contain hCG or LH.

Test results outside the specified time frame are invalid. An evaporation line can appear that can be mistaken for a positive result. It is advised to wait and test again another day.

A positive result will always be indicated by the presence of a distinct color band in the 'test' region of the pregnancy test strip or midstream test (accompanied by the presence of the 'control' band). If the test is faint (in comparison to the control band), the test may be positive, though the presence of hCG in the woman's body - or urine sample - may be low. The presence of hCG doubles every two days in a pregnant woman.

Being negative can be very positive. There is a difference between being nihilistic and being negative in the sense of being cautious and critical before believing a claim or accepting an explanation for something. A nihilist denies the value of everything. Many religious people are nihilists since they deny the value of anything in this world. The leaders of religions often reject family, reproduction, the joys of the body, the pleasures of art and nature.

No. The test for HIV can only tell you if you have been infected or not. Transmission of the virus does not necessarily occur every time exposure occurs. The only way for an individual to tell if he/she has been infected with HIV is to be tested. If you are unsure of your partner's status, you may want to consider talking to him/her about it and using protection (latex condoms or dental dams) to reduce your risk.

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.