Experimental study on primary transfer and secondary transfer of DNA / 中国法医学杂志

ABSTRACT

Objective To study primary transfer and secondary transfer of exfoliated cells by handshaking and touching. Methods Firstly, volunteers wash hands , then shake hands between two volunteers, after that each volunteer touch the cleaned glass. Finally, pick up the DNA from the glass. Results STR loci that can be extracted from glasses. Under the same conditions, the number of STR loci obtained by primary transfer is more than that obtained by the secondary transfer. Conclusion Primary transfer and secondary transfer of exfoliated cells could happened by handshaking and touching. Therefore, in forensic work, we should pay great attention to the pollution problems caused by DNA transfer.