利用绯颜裸金蝇(双翅目,丽蝇科)在中国西南地区进行死亡时间推断1例

Application of Chrysomya rufifacies(Diptera,Calliphoridae)to Postmortem Interval Estimation in Southwest China:A Case Report

在人类尸体上发现的昆虫样本可为最短死亡时间(minimum postmortem interval,PMImin)推断提供重要信息。在中国重庆某废弃工厂里发现了一具女性尸体,经现场勘验和尸体检验确认为他杀死亡。由于死者不同部位的腐败程度不一致,难以确定死亡时间。通过形态学观察和线粒体DNA测序分析,确定尸体上的昆虫样本为绯颜裸金蝇。根据该种属的发育速度资料,尸体的PMImin推断为452 h。死亡时间的准确推断为案件侦查和犯罪嫌疑人起诉提供了重要的昆虫学证据,证实了在该区域特定种属的昆虫学证据对准确死亡时间的推断具有较高的实用价值,尤其适合晚期腐败尸体的PMI推断。

Insect samples found on human corpses can provide the information important to estimating the minimum postmortem interval(PMImin).A female cadaver,found in a deserted factory in Chongqing of China,was confirmed as a homicide case after the forensic investigation and autopsy.Determining the time of death was difficult due to the inconsistent degree of decomposition in different parts of the decedent.The insect specimens found on the cadaver were identified to be Chrysomya rufifacies(C.rufifacies,Macquart)by morphology and mitochondrial DNA sequence analysis.The PMImin was estimated to be 452 h,based on the developmental rate of C.rufifacies.The PMImin was estimated successfully to be almost precise,which provided an important entomological evidence for case investigation and suspect prosecution.In so doing,this highlights the usefulness of entomological evidence of specific species in the geographic area for PMI accurate estimation,especially in the case of advanced decomposed corpses.