Can Dried Blood Be Used for DNA Testing?
Dried blood on a collection card, bandage, gauze or fabric may contain recoverable DNA. Because condition and history vary widely, dried blood is handled as a special sample and reviewed before submission.
Sample type: Laboratory assessment required · Typical suitability: Case dependent
What affects a dried blood sample
Recovery generally depends on the size of the stain, how completely it dried, how long ago it was deposited, and whether it was stored cool, dry and away from light. Moisture and mould are common reasons material degrades.
Because blood is a biological material, packaging and transport requirements apply. We will confirm what is appropriate for your situation before anything is shipped.
Before you send dried blood
Do not mail a dried blood sample until acceptance has been confirmed in writing along with packaging and shipping instructions.
What helps a sample
- Ensure the stain is completely dry before storage.
- Store in paper or a breathable envelope, never sealed plastic.
- Keep it cool, dry and out of direct sunlight.
- Newborn screening cards and medical samples may have additional consent requirements.
FAQ
Questions about dried blood samples
No sample can be guaranteed to produce a usable DNA profile. Laboratory analysis is performed by qualified, accredited laboratory partners, and acceptance of any report by a third party is not guaranteed.