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[Comparative studies of the practical use of different sperm samples]
1Institut für Rechtsmedizin der Universität Erlangen-Nürnberg.
Archiv Fur Kriminologie
|January 1, 1988
Summary
The phosphatase test offers the highest sensitivity for detecting seminal stains, while the choline test provides sufficient sensitivity. Other tested methods showed poor sensitivity and specificity for forensic analysis.
Area of Science:
- Forensic Science
- Biochemistry
Background:
- Accurate identification of seminal stains is crucial in forensic investigations.
- Evaluating the sensitivity and specificity of various detection techniques is essential for reliable results.
Purpose of the Study:
- To comparatively analyze the sensitivity and specificity of six different techniques for detecting seminal stains.
- To assess the reliability of these methods when applied to various biological samples and common food items.
Main Methods:
- Six distinct searching techniques were employed to test for seminal stains.
- The damp filter paper method was used to investigate stains from seven body secretions/excretions, 13 fruits, and 17 vegetables.
Main Results:
- The phosphatase test demonstrated the highest sensitivity, followed by the choline test (sufficient sensitivity).
- Spermine, gamma-glutamyltranspeptidase, and zinc tests exhibited insufficient specificity.
- False positive results were observed for the phosphatase test (kiwi, cauliflower, pea, potato) and choline test (cauliflower, pea, broccoli, leek, tomato).
Conclusions:
- The phosphatase test is the most sensitive method for seminal stain detection, despite some cross-reactivity.
- The choline test offers adequate sensitivity but also shows cross-reactivity.
- Several other tested methods lack the necessary specificity for reliable forensic application.