Human Bloodstains on Biological Materials

What is it about?

To assess whether biological substrates can affect the morphology of human erythrocytes in bloodstains, three fragments of different biological material (bone, shell, and wood) were smeared with peripheral human blood. Afterward, the bloodstains were directly examined with a scanning electron microscope following a procedure initially standardized to be used in uncoated human bloodstains on stone.

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Why is it important?

The obtained results suggest that scanning electron microscopy is suitable for examining untreated (i.e. without previous preparation) bloodstains on biological substrate and that the morphology of erythrocytes in human bloodstains is not affected by the biological nature of the substrate.