Clients call us all the time with questions about what we can and cannot use for DNA testing. Well, we can DNA test almost anything. There are a few questions we ask when clients have DNA samples for testing:
- How old is the sample?
- Who do you believe handled the sample?
- How is the sample being stored?
The answer to question 3 is almost always, “in a plastic bag”. It seems folks thinks the airtight quality of plastic bags makes them a safe bet for the storage of DNA samples. The truth is, almost all DNA samples should be stored in a paper bag and in a cool, dry place. Paper is breathable, so it prevents natural moisture buildup that can lead to bacteria growth. Bacteria is not good for DNA.
If you want to store a DNA sample, keep it in a paper bag or envelope. Store it in a cool dry place. Room temperature is usually fine and will keep the DNA viable for years. Keep in mind, if you intend to store the DNA sample for a very long period of time, colder is better. Here is a brief article about DNA storage.
If the DNA sample is yours, then it it alright to handle it. However, if the sample is from someone else you should make sure to wear gloves.
One other thing to mention is that these storage tips are for relationship testing needs. There are more stringent storage guidelines depending on your intentions for the DNA.
Feel free to visit our discreet DNA testing page for more information about non-standard DNA samples. Give us a call if you have questions about how to store or transport them.
