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Detecting multiple DNA human profile from a mosquito blood meal
K C N Rabêlo1,2, C M R Albuquerque3, V B Tavares4
1Laboratório de Imunopatologia Keizo Asami, Universidade Federal de Pernambuco, Recife, PE, Brasil kaynaracecilia@yahoo.com.br.
Genetics and Molecular Research : GMR
|October 6, 2016
Summary
Hematophagous mosquitoes from crime scenes can yield human DNA profiles for forensic investigations. This study demonstrates successful DNA profiling from mosquitoes containing mixtures of up to four individuals' genetic material.
Area of Science:
- Forensic Science
- Entomology
- Genetics
Background:
- Crime scene investigations often yield mixed DNA samples from multiple individuals.
- Identifying perpetrators relies on effective trace evidence analysis.
- Hematophagous insects at crime scenes represent a potential source of human DNA.
Purpose of the Study:
- To assess the feasibility of using mosquitoes (Aedes aegypti) for human DNA profiling in forensic contexts.
- To determine the efficacy of DNA recovery from mosquitoes fed on mixed human blood samples.
- To evaluate the impact of blood acquisition time on DNA profile quality.
Main Methods:
- DNA extraction from single Aedes aegypti mosquitoes.
- Analysis of short tandem repeat (STR) loci and amelogenin for human identification.
- Testing DNA profiles from mosquitoes at 24, 48, and 72 hours post-blood meal.
- Utilizing DNA mixtures from four individuals.
Main Results:
- Successful human DNA profiles were obtained from mosquitoes up to 24 hours after feeding.
- Mosquitoes could yield profiles from mixed DNA samples containing up to four individuals.
- The time elapsed since the blood meal affected DNA recovery.
Conclusions:
- Hematophagous mosquitoes can serve as valuable biological evidence at crime scenes.
- Mosquito DNA analysis can aid in identifying human genetic material from multiple individuals.
- This method offers a novel approach to forensic investigation and suspect identification.
