Alternative DNA Testing When Standard Cheek Swabs Are Not Available
Unusual DNA Sample Testing
Rhode Island Fingerprinting provides professional coordination support for unusual DNA sample testing when a standard cheek swab is unavailable. All unusual DNA samples must go through laboratory viability review to determine whether enough usable DNA is present for testing.
Viability Testing Required Before DNA Testing
Unusual DNA Sample Process
Unusual DNA samples must be processed through a laboratory viability review first. This determines whether the submitted sample contains enough usable DNA to proceed with relationship testing. Turnaround Time: Approximately 5 business days after sample acceptance and laboratory review. Important: Any unusual DNA sample from a deceased tested party must be handled under chain-of-custody with Next of Kin participation.
Lower Complexity Alternative DNA Samples
Category A Unusual DNA Samples
Bone Marrow Fresh bone marrow sample. Sample condition and collection timing may affect testing eligibility. Blood on Paper Blood collected on paper such as Whatman, Matrix, or similar paper. Semen Fresh semen sample or vaginal swab containing semen. Turnaround Time: Approximately 5 business days after viability review.
Moderate Complexity Alternative DNA Samples
Category B Unusual DNA Samples
Blood Stain on Fabric Blood stains on fabric may be reviewed for DNA testing. This may include bandages, gauze, facial tissues, napkins, or similar materials. Nail Clippings Nail clippings may be submitted for review. Approximately 5–10 clippings may be needed. Cigarette Butts Cigarette butts may be reviewed for DNA testing. Quantity may depend on type, brand, and sample condition. Diabetic Test Strips Diabetic test strips may be reviewed for DNA testing. Approximately 5–6 strips may be needed. Tissue / Organ Tissue or organ samples may be reviewed through chain-of-custody testing only. Sample viability may depend on age, storage conditions, and whether the individual was embalmed. Chewing Gum Chewing gum may be reviewed for DNA testing. Sugarless gum is preferred. Ear Swab Ear swabs may be reviewed for DNA testing. Fetal Demise Fetal tissue may be reviewed for DNA testing. Special handling and chain-of-custody requirements may apply. Semen Stain on Fabric Semen stains on fabric may be reviewed. The stained area should be indicated on the fabric. Toothbrush A toothbrush may be reviewed for DNA testing if used by the tested individual. Umbilical Cord Umbilical cord samples may be reviewed. A reference sample from the mother may be needed, and the cord should be dried. Turnaround Time: Approximately 5 business days after viability review.
Advanced Alternative DNA Samples
Category C Unusual DNA Samples
Dental Floss Used dental floss may be reviewed for DNA testing. Pacifier A pacifier may be reviewed for DNA testing if used by the tested individual. Tooth A tooth may be reviewed for DNA testing. Hair With Roots Hair must include roots. Approximately 7–10 pieces are recommended. Shed hair or cut hair generally will not work. Razor A full blade or disposable razor may be submitted. Debris can be placed in an envelope when applicable. Mucus Mucus samples may be reviewed when collected from facial tissue, Kleenex, napkin, or paper towel. Condom Condom samples may be reviewed depending on storage condition. Swabbing inside of the condom may be required. Tissue in Paraffin Paraffin block or slides may be reviewed for DNA testing. Turnaround Time: Approximately 5 business days after viability review.
Low-Level DNA Recovery Samples
Trace DNA Sample Testing
Soda Can / Drinking Glass / Plastic Cup Used drinking containers may be reviewed for DNA testing. The contact area should be clearly marked when possible. Feminine Hygiene Product Tampons or feminine hygiene products may be reviewed for DNA testing. Drinking Straw Used drinking straws may be reviewed for DNA testing. Envelope Flaps Envelope flaps may be reviewed. Viability may depend on age and how the envelope was sealed. Turnaround Time: Approximately 5 business days after viability review.
Specialized DNA Collection & Laboratory Coordination
Fetal Demise DNA Testing
DNA testing may be available using eligible fetal demise tissue specimens when standard collections are unavailable. Special handling, viability review, laboratory approval, and chain-of-custody procedures may apply. Turnaround Time: Approximately 5 business days after viability review.
Chain of Custody & Next of Kin Participation Required
Deceased Individual DNA Testing
DNA testing involving a deceased individual requires chain-of-custody procedures and legal Next of Kin participation before testing can proceed. Examples may include tissue samples, teeth, hair with roots, umbilical cord samples, fetal demise specimens, and other eligible biological samples.
Restricted Sample Types
Samples Not Accepted For DNA Testing
The following sample types are not accepted for unusual DNA testing: • Fixed samples / formalin-fixed samples • Food • Vomit • Stool samples • Urine
Before Submitting A Sample
Unusual DNA Sample Submission Requirements
• Sample must be suitable for DNA viability review • Certain samples require minimum quantities • Certain samples require special packaging • Chain-of-custody procedures may apply • Next of Kin authorization may be required for deceased individual samples • Laboratory acceptance is subject to viability review • Additional documentation may be required depending on specimen type • Turnaround times begin after laboratory acceptance and review • Submission does not guarantee that usable DNA will be recovered
Professional DNA Sample Review & Collection Support
Need Help With An Unusual DNA Sample?
Schedule a consultation to review your sample type, chain-of-custody requirements, viability testing needs, and next steps.
Alternative DNA Testing & Specialty DNA Sample Review
Unusual DNA Sample Testing in Rhode Island
Rhode Island Fingerprinting provides professional coordination support for unusual DNA sample testing, alternative DNA samples, fetal demise DNA testing, deceased individual DNA testing, toothbrush DNA testing, hair with roots DNA testing, tooth DNA testing, umbilical cord DNA testing, cigarette butt DNA testing, dental floss DNA testing, razor DNA testing, envelope flap DNA testing, trace DNA sample testing, and chain-of-custody DNA testing throughout Rhode Island, Massachusetts, Connecticut, and eligible nationwide workflows.
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