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首页> 外文期刊>Journal of Medical Entomology >Dynamics of Necrophagous Insect and Tissue Bacteria for Postmortem Interval Estimation During the Warm Season in Romania
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Dynamics of Necrophagous Insect and Tissue Bacteria for Postmortem Interval Estimation During the Warm Season in Romania

机译：罗马尼亚暖季期间食尸昆虫和组织细菌的事后估计动态。

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The estimation of postmortem interval (PMI) is affected by several factors including the cause of death, the place where the body lay after death, and the weather conditions during decomposition. Given the climatic differences among biogeographic locations, the understanding of necrophagous insect species biology and ecology is required when estimating PMI. The current experimental model was developed in Romania during the warm season in an outdoor location. The aim of the study was to identify the necrophagous insect species diversity and dynamics, and to detect the bacterial species present during decomposition in order to determine if their presence or incidence timing could be useful to estimate PMI. The decomposition process of domestic swine carcasses was monitored throughout a 14-wk period (10 July-10 October 2013), along with a daily record of meteorological parameters. The chronological succession of necrophagous entomofauna comprised nine Diptera species, with the dominant presence of Chrysomya albiceps (Wiedemann 1819) (Calliphoridae), while only two Coleoptera species were identified, Dermestes undulatus (L. 1758) and Creophilus maxillosus Brahm 1970. The bacterial diversity and dynamics from the mouth and rectum tissues, and third-instar dipteran larvae were identified using denaturing gradient gel electrophoresis analysis and sequencing of bacterial 16S rRNA gene fragments. Throughout the decomposition process, two main bacterial chronological groups were differentiated, represented by Firmicutes and Gammaproteobacteria. Twenty-six taxa from the rectal cavity and 22 from the mouth cavity were identified, with the dominant phylum in both these cavities corresponding to Firmicutes. The present data strengthen the postmortem entomological and microbial information for the warm season in this temperate-continental area, as well as the role of microbes in carcass decomposition.
机译：死后时间间隔（PMI）的估计受几个因素影响，包括死亡原因，死亡后尸体所在的位置以及分解过程中的天气状况。考虑到生物地理位置之间的气候差异，在估计PMI时需要了解食虫性昆虫物种的生物学和生态学。当前的实验模型是在罗马尼亚在室外暖和季节开发的。该研究的目的是确定食虫性昆虫的物种多样性和动力学，并检测分解过程中存在的细菌种类，以确定它们的存在或发生时间是否可用于估计PMI。在整个14周内（2013年7月10日至10月10日）监控了家猪尸体的分解过程，并每日记录了气象参数。食虫性昆虫动物的时间顺序包括九种双翅类，主要有白屈丝菌（Wiedemann 1819）（Calliphoridae），而只鉴定了两种鞘翅目，Dermestes undulatus（L。1758）和Creophilus maxillosus Brahm1970。细菌多样性。通过变性梯度凝胶电泳分析和细菌16S rRNA基因片段的测序，鉴定了来自口腔和直肠组织的动力学，第三龄二倍体二倍体幼虫。在整个分解过程中，区分了两个主要的细菌时间顺序组，分别以Firmicutes和Gammaproteobacteria为代表。从直肠腔中鉴定出二十六个分类单元，从口腔中鉴定出二十二个分类单元，在这两个腔中的优势门对应于硬毛。目前的数据加强了这个温带大陆地区暖季的死后昆虫学和微生物信息，以及微生物在car体分解中的作用。

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