It Is Possible The NDA Test Samples Collected From Chris was Contaminated.
Take A Look At Ways Paternity Test Samples Can Get Contaminated
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1. Eating, Drinking, Smoking, etc.
Foreign particles from food, liquids, toothpaste and tobacco byproducts don’t alter the DNA but they can mask it. The consequence is that the sample becomes degraded and therefore unusable for paternity testing. Even babies being tested shouldn’t nurse or have a bottle prior to testing.
2. Spitting on Swabs Instead of Swabbing Cheek Cells
With the new popularity of some ancestry tests, it’s easy for paternity customers to get confused between collecting cheek cells and collecting spit, or saliva. The two types of samples are definitely not interchangeable. Robots for relationship testing are designed to extract DNA from cheek cells, and cheek cells provide a more concentrated amount of high-quality DNA.
It’s critical to maintain the integrity of each swab from start to finish when you are handling swabs. If you handle the tips of the swab, especially if you are swabbing someone else, drop the swab or accidentally put swabs from two different people in the same envelope. It will be Contaminated.
4. Some Medical Procedures
The following scenarios can definitely have an effect on paternity testing results:
(a) A participant has recently had a blood transfusion.
(b) A participant has ever had a bone marrow transplant.
In both scenarios, someone else’s DNA has been introduced into a participant’s body and can remain there, either temporarily or for long periods of time. When the paternity testing sample DNA from that participant is amplified in the lab, technicians may see two separate profiles from that one individual.
5. Re-using Packaging
Cheek swabs are specially-created for DNA collection and they come sealed in plastic packaging to keep them sterile. While this packaging is perfect for unused buccal swabs, it causes problems for swabs once they’ve been used to collect DNA, because a DNA sample contains cheek cells which are inevitably mixed with some saliva. When you put a wet swab back in the plastic packaging, the sample can no longer ‘breathe,’ and mold nearly immediately starts growing. This mold can degrade or destroy the DNA on the swab so much that the DNA can’t be extracted and tested.
6 Mailing Wet Envelopes
The swabs pick up cheek cells, but also some saliva too. As a result, it’s not unusual for the paper envelopes containing samples to get a little wet. If envelopes are mailed while still damp, they can rip while en route to the lab. This unfortunately contaminates all samples.