[ABO blood group typing in forensic autopsies]

Area of Science:

• Forensic Science and Medicine
• Immunogenetics

Context:

• The ABO blood group system is prevalent and its antigens are found on erythrocytes and other tissues, offering stability even under harsh conditions.
• Determining ABO blood groups from post-mortem samples is challenging due to sample degradation (hemolysis, putrefaction, mummification, skeletonization).

Purpose:

• To review the advantages and disadvantages of various ABO blood grouping methods used in forensic autopsies.
• To highlight the importance of species identification before ABO genotyping to avoid cross-contamination with animal DNA.

Summary:

• This presentation examines hemagglutination, absorption-elution, histochemical techniques, and ABO genotyping for forensic ABO blood grouping.
• It emphasizes the necessity of understanding ABO antigen distribution and performing species identification to ensure accurate human ABO genotyping.

Impact:

• Provides a comprehensive overview of ABO blood grouping techniques in forensic contexts.
• Stresses the critical need for species verification to maintain the integrity of human DNA analysis in forensic casework.