Assessing the consistency of shedder status under various experimental conditions

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Assessing the consistency of shedder status under various experimental conditions

Jansson, Linda (author): Lund University,Lunds universitet,Teknisk mikrobiologi,Centrum för tillämpade biovetenskaper,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Applied Microbiology,Center for Applied Life Sciences,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Swedish National Forensic Center,Swedish Police Author, Natl Forens Ctr, SE-58194 Linkoping, Sweden; Lund Univ, Sweden

Siti, Chiara (author): Lund University,Lunds universitet,Teknisk mikrobiologi,Centrum för tillämpade biovetenskaper,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Applied Microbiology,Center for Applied Life Sciences,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Lund Univ, Sweden

Hedell, Ronny (author): Swedish National Forensic Center,Swedish Police Author, Natl Forens Ctr, SE-58194 Linkoping, Sweden

Forsberg, Christina (author): Swedish National Forensic Center,Swedish Police Author, Natl Forens Ctr, SE-58194 Linkoping, Sweden

Ansell, Ricky (author): Linköpings universitet,Linköping University,Biologi,Tekniska fakulteten,Swedish Police Author, Natl Forens Ctr, SE-58194 Linkoping, Sweden

Hedman, Johannes (author): Lund University,Lunds universitet,Teknisk mikrobiologi,Centrum för tillämpade biovetenskaper,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Applied Microbiology,Center for Applied Life Sciences,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Swedish National Forensic Center,Swedish Police Author, Natl Forens Ctr, SE-58194 Linkoping, Sweden; Lund Univ, Sweden; Naturvetarvagen 14, Sweden

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ELSEVIER IRELAND LTD, 2024
2024
English.
In: Forensic Science International: Genetics. - : ELSEVIER IRELAND LTD. - 1872-4973 .- 1878-0326. ; 69

Related links:: http://dx.doi.org/10... (free); show more...; https://lup.lub.lu.s...; https://doi.org/10.1...; https://urn.kb.se/re...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

Shedder status is defined as the propensity of an individual to leave DNA behind on touched items or surfaces and has been suggested as one of the major factors influencing DNA transfer. However, little is known about whether shedder status is a constant property of an individual across multiple measurements or when the environmental conditions are changed. We have assessed DNA depositions of six males on 20 occasions to acquire a reference data set and to classify the participants into high, intermediate, or low shedders. This data set was also used to investigate how the probability of a correct shedder status classification changed when the number of DNA deposition measurements increased. Individual sweat rates were measured with a VapoMeter and data regarding hygiene routines were collected through a questionnaire on each sampling occasion. Next, we investigated how changes in the experimental conditions such as seasonal variation, hygiene routines, the temperature of the touched object, and repeated handling of an object influenced the DNA shedding. Additionally, we assessed DNA collected from the face and from T-shirts worn by the six participants to explore whether shedder status may be associated with the relative amount of DNA obtained from other body parts. Our results indicate that shedder status is a stable property across different seasons and different temperatures of handled objects. The relative DNA amounts obtained from repeatedly handled tubes, worn T-shirts, and from faces reflected the shedder status of the participants. We suggest that an individual's shedder status is highly influenced by the DNA levels on other body parts than hands, accumulating on the palms by frequently touching e.g., the face or previously handled items harboring self-DNA. Assessing physiological differences between the participants revealed that there were no associations between DNA shedding and individual sweat rates.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP -- Annan medicin och hälsovetenskap -- Rättsmedicin (hsv//swe)
MEDICAL AND HEALTH SCIENCES -- Other Medical and Health Sciences -- Forensic Science (hsv//eng)
NATURVETENSKAP -- Biologi -- Genetik (hsv//swe)
NATURAL SCIENCES -- Biological Sciences -- Genetics (hsv//eng)

Keyword

DNA deposition
DNA transfer
Forensic DNA Analysis
Shedder classification
Shedder status
Sweat
DNA deposition; DNA transfer; Forensic DNA Analysis; Shedder classification; Shedder status; Sweat

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art (subject category)
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By the author/editor: Jansson, Linda; Siti, Chiara; Hedell, Ronny; Forsberg, Christ ...; Ansell, Ricky; Hedman, Johannes

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MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Other Medical an ...; and Forensic Science

NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Genetics

Articles in the publication: Forensic Science ...

By the university: Lund University; Linköping University

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