Reported are 2 autopsy cases in which Y-chromosomal microsatellite short tandem repeats DYS19, DYS389I and II, DYS390, and DYS393 could be haplotyped with vaginal swabs by using a Chelex 100-based DNA extraction method and dual-round polymerase chain reaction. The extraction of DNA from vaginal swabs by using this method was as efficient or more efficient than using proteinase K and phenol-chloroform extraction or the alkaline lysis methods. Y-chromosomal microsatellite short tandem repeats haplotyping based on the dual-round polymerase chain reaction method provided genotypes from all the loci determined. Although amplification of Y-chromosomal microsatellite short tandem repeats loci is not directly involved in the existence of spermatozoa, it is considerably advantageous for male individualization from body fluid mixture stains in criminal cases.
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