NASCAR: Jeremy Mayfield hearing delayed
The U.S. Court of Appeals has rescheduled the Nov. 8 hearing for suspended driver Jeremy Mayfield's appeal in his case against NASCAR. The court cited "scheduling reasons" for taking the case off the Nov. 8 docket but didn't offer details. The former owner/driver is suing NASCAR for breach of contract, defamation and unfair trade practices.
Mayfield has not competed in NASCAR since failing a drug test in May 2009. NASCAR said a random test came up positive for methamphetamines; Mayfield says it was a false positive from a combination of prescription medication for attention-deficit-hyperactivity disorder and over-the-counter allergy medication.
The case likely won't be heard until Dec. 6-9, although it could move to Oct. 25-28. A three-judge panel will decide whether Mayfield has enough evidence for his case to continue.
In May 2010, Judge Graham Mullen dismissed the claims and said Mayfield could not sue NASCAR because of waivers he signed to compete in Sprint Cup. The judge also questioned the strength of Mayfield's evidence.
Drug Testing And False Positives - News
Mayfield has not competed in NASCAR since failing a drug test in May 2009. NASCAR said a random test came up positive for methamphetamines; Mayfield says it was a false positive from a combination of prescription medication for
It is a far different thing than unreliability, which would be something that would promote a false positive, something you absolutely cannot have in the context of drug testing. There has been zero indication from anyone since sort of the dawn of this
In April this year, the Society of Hair Testing (SoHT) confirmed that dual testing on hair for alcohol misuse provides accuracy rates of over 94%, with less than 1% risk of a false positive, and just 5.75% risk of a false negative.
In a properly controlled lab environment, a second test is done to verify any positive tests in order to reduce the risk of false-positives or contamination. Testing for human growth hormone, however, is done via blood samples.
She says the public should not be lulled into a false sense of security after only one person tested positive in the April to June testing period. There were 423 tests given in the quarter. From April 2010 to February 2011, 955 tests were given with
Immunoassay Drug Test | Dreaming Life
What is an Immunoassay Drug Test?It’s a drug test based on identifying the antibodies that bind to specific drugs or drug metabolites in a urine sample.
Popular immunoassays are inexpensive and usually used to pre-screen a sample before subjecting it to more expensive (and reliable) tests.
Basic Principles of Immunoassay Drug Testing
An immunoassay is a test that can identify specific substances in a sample of multiple substances. ( Source )
For example, in a urine sample.
Identification is based on the following principles:
Antibodies, called an antigen, will bind to specific a molecule or group of molecules. Identification of drugs based on the ability to identify antibodies that bind to specific molecules – either drugs or drug metabolites – in the sample.There are different ways to identify the antibody/antigen and thus test for drugs in a sample.
Next we’ll look at those different methods used to make this identification.
This is the most popular and widespread test used by employers and at home drug testing kits. If you have to take a urine test for a job, most likely it will be for an EMIT test. In the case of marijuana, the cut off level is usually 50 ng/ml. Note that if results indicate the presence of drugs in a sample, the testing rarely steps here: the EMIT is merely used to pre-screen a wide amount of samples for the cheapest price. Those samples that test positive are then sent in for further testing using a more expensive yet more reliable technique.The EMIT uses an enzyme as its method of detection.
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