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Related Experiment Videos

DNA typing and blood transfusion

P Brauner1

  • 1Forensic Biology Laboratory, Israel Police National Headquarters, Jerusalem, Israel.

Journal of Forensic Sciences
|September 1, 1996
PubMed
Summary

Large blood transfusions did not alter a patient's DNA profile in a forensic case. DNA testing remains reliable for identifying individuals even after significant blood transfusions.

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Area of Science:

  • Forensic Science
  • Genetics
  • Medical Diagnostics

Background:

  • A traffic accident victim required multiple blood transfusions due to severe injuries.
  • Police sought to link the unconscious victim to a stolen vehicle using bloodstain analysis.

Observation:

  • Conventional blood group assays showed alterations due to the transfusion.
  • DNA analysis, including RFLP and PCR, did not reveal any changes from the transfused blood.

Findings:

  • DNA profiles of the victim remained consistent despite substantial blood transfusions.
  • Transfused blood did not mask or alter the recipient's endogenous DNA profile.

Implications:

  • DNA testing is a robust method for forensic identification, unaffected by large-volume transfusions.
  • This finding supports the reliability of DNA evidence in legal investigations involving transfusion recipients.

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