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微生物群落的变化使用猪作为死后间隔估计模型

Fan Yang¹, Xiangyan Zhang², Sheng Hu¹

¹Institute of Forensic Science, Ministry of Public Security, Beijing 100038, China.

|November 25, 2023

概括

在分解过程中微生物群落的变化可以帮助估计死后间隔 (PMI). 研究人员在细菌继承中发现了可预测的模式,这表明PMI决定的新法医工具.

科学领域:

法医微生物学法医微生物学
分解生态学分解生态
微生物的继承.

背景情况:

微生物群落在分解过程中发生变化,为死后间隔 (PMI) 估计提供了潜力.
尸体分解释放液体,改变周围的土壤微生物群.

研究的目的:

为了研究猪尸体分解过程中微生物群落的继承.
探索微生物生物标志物在PMI估计中的潜力.

主要方法:

在分解过程中对猪尸体和底层土壤中的微生物群落进行分析.
使用随机森林 (RF) 模型来评估基于细菌的PMI估计准确性.
在破裂前阶段和破裂后阶段之间比较微生物多样性和社区组成.

主要成果:

像Firmicutes和Bacteroidota这样的细菌系主导了早期的衰变,而Proteobacteria在晚期的衰变中增加.
细菌的丰富性通常会随着长时间的分解而减少.
在破裂前和破裂后阶段之间观察到微生物多样性的显著差异,分别具有明显的无氧和有氧生物标志物.
瓦戈科库斯 (Vagococcus) 属在不同季节之间显示出一致的增长趋势.

结论:

在分解过程中微生物的继承是可以预测的.
细菌属可以作为可靠的生物标志物来估计PMI.
这些发现支持微生物分析作为PMI确定法医工具的发展.

关键词:

法医科学法医科学法医科学微生物社区的微生物社区.死亡后间隔估计估计.破裂破裂破裂破裂

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