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J Forensic Sci. 2017 Jan;62(1):192-196. doi: 10.1111/1556-4029.13222. Epub 2016 Dec 1.

Informativeness of NGS Analysis for Vaginal Fluid Identification.

Author information

1
Department of Movement, Human and Health Sciences, Public Health Unit, University of Rome "Foro Italico", Piazza Lauro De Bosis, 6, 00135, Rome, Italy.
2
Reparto Investigazioni Scientifiche di Roma, Carabinieri, Viale di Tor di Quinto, 119, 00191, Rome, Italy.

Abstract

The identification of vaginal fluids in forensic examinations plays an important role in crime scene reconstruction. Molecular detection of vaginal bacterial communities can lead to the correct discrimination of body fluids. These kinds of studies can be performed through multiplex real-time PCR using primers for a specific selection of bacteria. The availability of next-generation sequencing (NGS) protocols provided for the extension of the analysis to evaluate the prokaryotes present in specimens. In this study, DNA was extracted from 18 samples (vaginal, oral, fecal, yoghurt) and analyzed by real-time PCR and NGS. The comparison between the two approaches has demonstrated that the information developed through NGS can augment the more conventional real-time PCR detection of a few key bacterial species to provide a more probative result and the correct identification of vaginal fluid from samples that are more forensically challenged.

KEYWORDS:

bacteria; body fluids; forensic science; metabarcoding; mfDNA; multiplex PCR

PMID:
27907225
DOI:
10.1111/1556-4029.13222
[Indexed for MEDLINE]

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