Valley Medical’s vTOX DNA verification testing captures the size and presence of twelve specific genomic features referred to as short tandem repeats (STR). Due to inheritance and random events during replication, every individual has a unique size and frequency of these STRs. The test also measures the length of the Amelogenin gene, which is different between males and females.
Yes, the samples from patients who submit fake urine will either have no human DNA present or have non-matching DNA. If patients try to mix their sample with others, our test will detect an impossible number of alleles and the result will fail.
This test specifically and exclusively measures short tandem repeat (STR) regions that do not contain any relevant genetic risk factors or clinically relevant results. The results of this test can only be used for the matching of human samples.
No, the DNA samples we collect are safely disposed of after the initial analysis. We store only select DNA data, not the genetic material itself.
The genetic results of this test are compared to the patient’s reference sample profile. This validates the patient’s sex type as well as the twelve standard U.S. Core Loci to ensure sample identification.
Valley Medical’s vTOX DNA verification is extremely accurate. The probability of a random match occurring are at most 1 in 150,000,000,000.
While a cheek swab is only necessary on the initial visit, vTOX DNA-verification testing is conducted for every urine sample we receive. This ensures patient validity and eliminates the need for more invasive sample verification methods, such as viewed collections.
vTOX DNA-verification testing takes the same amount of time as our standard toxicology analysis. Results will be reported within 36 hours of samples being received in our laboratory.