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Application of Trace Biological Evidence Collection Kit in DNA Examination of Trace Bloodstain Samples from the Scene / 法医学杂志
Journal of Forensic Medicine ; (6): 65-68, 2021.
Article in English | WPRIM | ID: wpr-985195
ABSTRACT
Objective To evaluate the effects of DNA examination of trace bloodstain samples from the scene collected with Trace Biological Evidence Collection kit. Methods Venous blood was made into bloodstains on the ground. The trace bloodstain samples were collected with Trace Biological Evidence Collection kit and common methods, respectively. DNA examination of trace bloodstain samples (50 from each group) was conducted on the constant temperature shaker for 2, 24, 48, 72, and 96 h, respectively, and the examination results of every group were compared. Results When the trace bloodstain samples were placed on the constant temperature shaker for 24, 48, 72, and 96 h, the DNA detection rates in the group which used Trace Biological Evidence Collection kit (100.00%, 100.00%, 100.00%, 96.00%) were significantly higher than those in the group using common methods (62.00%, 26.00%, 10.00%, 0), the differences had statistical significance (P<0.05). When the trace bloodstain samples were placed on the constant temperature shaker for 2 h, the differences of DNA detection rates between the two groups had no statistical significance ( P>0.05). Conclusion The Trace Biological Evidence Collection kit can effectively improve DNA detection rate and extend detection time limit for trace bloodstain samples from the scene that have been stored for a relatively long time.
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Full text: Available Index: WPRIM (Western Pacific) Main subject: Temperature / Blood Stains / DNA / Forensic Medicine Language: English Journal: Journal of Forensic Medicine Year: 2021 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Temperature / Blood Stains / DNA / Forensic Medicine Language: English Journal: Journal of Forensic Medicine Year: 2021 Type: Article