Cigarette Butts, Hair, and Other Unusual Samples
Tuesday, May 30th, 2006Sometimes patients ask us if we will perform DNA testing on samples other than buccal swab samples. For example, one woman writes:
I have an opportunity to test the person I think might be my son’s dad. This may be the only time I have this chance…My son is 13, almost 14, and has no idea who his father is—nor does the man. I would just like to know for medical reasons. I think hair is going to be hard to get, but what about cigarettes?
The preferred sample for paternity testing is the buccal swab sample, because it contains enough viable DNA for a paternity test. However, patients may consider using unusual samples when one of the parties they would like to test is deceased, missing, or otherwise unavailable for testing. To perform a DNA test on an unusual sample such as a cigarette butt, hair, or a toothbrush, we must first perform what is called a viability test. This test determines whether the sample contains sufficient DNA for testing.
If the viability test shows that the unusual sample does contain enough DNA, the sample can then be used in a DNA test. In the scenario above, for example, the cigarette butt could be used as the alleged father’s sample for a paternity test. To get the other samples needed for the test, we would send a free Beta Self-Collection™ Kit to the mother so she could collect her own and her son’s samples using buccal swabs.
On the other hand, the viability test could show that the sample does not contain sufficient DNA. At this point, the person who collected the unusual sample would have to consider other possible samples for use in a DNA test.
If you are in a similar situation and would like to learn more about unusual samples, please visit our Viability Testing page or call one of our knowledgeable testing specialists at 1-800-798-3810.
