大鼠尸體細(xì)菌群落演替與PMI推斷意義
[Abstract]:Objective to explore the variation and regularity of bacterial succession during the decay of rat natural body cavity in insect isolation environment. To explore the changes of bacterial flora and quantity during corrupting and to evaluate the potential value of estimating the time of death (postmortem interval, PMI) by bacterial succession. Methods female adult SD rats were used in animal experiments. The rats were killed by transection of vertebrae and placed in isolation environment. The bacteria were cultured by fixed point sampling, semi-quantitative counting and isolation and identification. The changes of colony composition and succession at different time points were analyzed. Results Staphylococcus and Neisseria had a better indication of early death time (Early PMI), while Lactobacillus had a stronger significance in predicting late death time (Late PMI). From the point of view of sampling site, the independence and particularity of vaginal succession showed higher practical value than other sampling points. Conclusion 1) the succession of bacterial communities in cadavers is regular over time. 2) Staphylococcus and Neisseria have indicative effect on early death time. 3) Lactobacillus can indicate the late death time.
【學(xué)位授予單位】:中南大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2013
【分類(lèi)號(hào)】:D919.4
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