Cross Peter, Simmons Tal
School of Forensic and Investigative Science, University of Central Lancashire, Preston PR1 2HE, UK.
J Forensic Sci. 2010 Mar 1;55(2):295-301. doi: 10.1111/j.1556-4029.2009.01277.x. Epub 2010 Feb 5.
An understanding of the factors affecting decomposition is important for the accurate estimation of postmortem interval. An experimental study on the influence of penetrating trauma on decomposition rate was carried out using the domestic pig, Sus scrofa. The results of this study were: (i) Diptera were preferentially attracted to and oviposited at natural orifices. Trauma sites were not preferentially selected for oviposition; (ii) no differences between trauma and non-trauma groups were found in time to skeletonization, weight loss (p = 0.906), total body score (p = 0.824), body temperature (p = 0.967), or changes in soil pH (p = 0.684); and (iii) the effect of investigator disturbance was significant when decomposition was measured as weight loss (p = 0.000). This study suggests that penetrating trauma of the type used in this study cannot be considered a major factor in the rate of decomposition and time to skeletonization of a gunshot trauma victim.
了解影响尸体分解的因素对于准确估计死后间隔时间很重要。利用家猪（Sus scrofa）开展了一项关于穿透性创伤对分解速率影响的实验研究。该研究结果如下：（i）双翅目昆虫优先被天然孔口吸引并在其中产卵。创伤部位并非产卵的优先选择部位；（ii）在达到白骨化的时间、体重减轻情况（p = 0.906）、全身评分（p = 0.824）、体温（p = 0.967）或土壤pH值变化（p = 0.684）方面，创伤组和非创伤组之间未发现差异；（iii）当以体重减轻衡量分解情况时，调查人员干扰的影响显著（p = 0.000）。本研究表明，本研究中使用的那种穿透性创伤不能被视为枪伤受害者分解速率和达到白骨化时间的主要因素。
