Journal of Forensic Medicine

›› 2016, Vol. 32 ›› Issue (1): 1-6.DOI: 10.3969/j.issn.1004-5619.2016.01.001

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Bacterial Succession on Rat Carcasses and Applications for PMI Estimation

ZHANG LIN1, GUO JUAN-JUAN1, T?L?T·SIYIT2, PENG YU-LONG1, XIE DAN1, GUO YA-DONG1, YAN JIE1, ZHA LAGABAIYILA1, CAI JI-FENG1   

  1. （1. Department of Forensic Science, School of Basic Medical Sciences, Central South University, Changsha 410013, China; 2. Department of Investigation, Xinjiang Police College, Urumchi 830011, China）
  • Online:2016-02-25 Published:2016-02-28
  • Contact: CAI Ji-feng, professor, major in forensic pathology and entomology; E-mail: cjf_jifeng@163.com
  • About author:ZHANG Lin （1986—）, postgraduate, major in forensic pathology; E-mail: lyre2008@126.com
  • Supported by:

    the National Natural Science Foundation of China （81373249 and 81571855）, the Science and Technology Committee of Shanghai Municipality （KF1203）, the Fundamental Research Funds for the Central Universities of Central South University （2015zzts276） and the Graduate Student Education Innovation Projects of Central South University （160020009）

Abstract: Abstract: Objective To investigate the bacterial succession on rat carcasses and to evaluate the use of bacterial succession for postmortem interval （PMI） estimation. Methods Adult female SD rat remains were placed in carton boxes. The bacterial colonization of circumocular skin, mouth and vagina was collected to be identified using culture-dependent biochemical methods. The changes in community composition were regularly documented. Results The bacterial succession in three habitats showed that Staphylococcus and Neisseria were predominated in early PMI, especially Staphylococcus aureus and Neisseria lactamica in 6 hours after death. Lactobacillus casei developed on the 3-4 days regularly, and kept stable at a certain level in late PMI. Conclusion The involvement of normal and putrefactive bacteria in three body habitats of rat remains can be used for PMI estimation.

Key words: forensic pathology, bacteria, postmortem interval, rats

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