排序方式: 共有25条查询结果,搜索用时 15 毫秒
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目的应用mt DNA中COI(348bp)、COII(637bp)及16Sr DNA(513bp)基因序列鉴定贵阳地区常见尸食性蝇类的种属。方法收集贵阳地区常见尸食性蝇类标本,经形态学分类鉴定后提取胸肌DNA,扩增COI(348bp)、COII(637bp)及16Sr DNA(513bp)基因片段,测序后用DNAMAN 4.0序列分析软件进行序列拼接,NCBI中的BLAST、MEGA 5.2软件包对所得序列分析建立种内及种间进化分歧率,并构建系统发育树。结果 COI种间平均进化分歧率为12.55%,种间范围在3.0%~18.6%,种内范围在0%~0.7%;COII种间平均进化分歧率为13.73%,种间范围在5.3%~21.6%,种内范围在0%~0.6%;16Sr DNA种间平均进化分歧率为4.54%,种间范围在0.4%~7.6%,种内范围在0%~0.4%。结论 COI、COII及16Sr DNA可用于尸食性蝇类的种属鉴定,该方法可作为传统分类方法的补充手段。 相似文献
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目的了解北京地区目前尸食性蝇类数目及常见尸食性蝇类的季节分布。方法采用动物尸体或组织诱捕和饲养的方法采集尸食性蝇类标本,对其进行分类保存后进行观察和统计。结果北京地区尸食性蝇类为4科9亚科21属46种,其中有12种是北京新记录种。尸食性蝇类具有区域性分布和季节性分布的特性。结论北京地区尸食性蝇类及常见的尸食性蝇类季节分布数据,可为相关研究提供参考依据。 相似文献
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目的探讨改良后十六烷基三甲基溴化铵(cetyltriethylammnonium bromide,CTAB)法对常见嗜尸性昆虫虫体不同部位mtDNA的提取效果。方法随机采集放置在呼和浩特地区室外草地家兔尸体上丽蝇科的丝光绿蝇[Lucilia sericata(Meigen)]、埋葬甲科的Nicrophorus fossor(Erichson)各13例,采用改良CTAB法分别提取每只昆虫头部、胸肌、腿部、翅膀4个部位的mtDNA,核酸蛋白测定仪检测DNA纯度及质量浓度,琼脂糖凝胶电泳检测其PCR产物,测定PCR产物序列,上传GenBank。结果 13例丝光绿蝇[Lu-cilia sericata(Meigen)]的胸肌均提取到了DNA,10例头部样本、6例腿部样本、4例翅膀样本得到DNA;13例Nicrophorus fossor(Erichson)胸肌DNA均提取成功,5例头部样本、8例腿部样本及3例翅膀样本提取出DNA。结论改良CTAB法可用于对嗜尸性昆虫胸肌及其他部位进行DNA的提取。 相似文献
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Alexandre Ariel da Fonseca de Souza B.Sc. Cássio Thyone Almeida de Rosa B.Sc. Luciano Chaves Arantes M.Sc. José Roberto Pujol-Luz Ph.D. 《Journal of forensic sciences》2020,65(3):1012-1015
Ants are one of the first insects to find an exposed cadaver and can be present during all stages of decomposition. Although these organisms are not commonly used in postmortem interval estimates, they are to be taken into account on criminal investigations involving human corpses, since they can leave bite marks that can be mistaken for antemortem or perimortem injuries, which could be misleading when ascertaining the occurrence of abuse or physical altercation during a crime. A few studies report the action of ants on human cadavers and even though leaf-cutting ants of the genus Atta are frequently encountered in succession studies that use animal carcasses, there are no records of these fungus-growing species on human corpses. Atta is a genus restricted to the New World, ranging from northern Argentina to southern United States and acts as one of the most conspicuous neotropical herbivores. In this study, we report three cases of violent death that illustrate the impact of ants, especially those of the genus Atta, in a forensic setting. We compare the patterns displayed by postmortem bite injuries caused by leaf-cutter ants and other common species with less robust mandibles. We also present the capability of Atta ants to create artifacts by cutting victim’s clothes in a crime scene, contributing to the knowledge of ant-mediated confounding factors in crime scene investigation. 相似文献
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目的 观察补益脾胃法结合虫类药对中后期脊髓损伤患者神经功能恢复的影响。方法 将40例脊髓损伤中后期患者随机分为治疗组和对照组,每组20例,对照组予综合康复治疗和甲钴胺片口服,治疗组予综合康复治疗和龙芪强肌饮及虫类药煎服,观察比较治疗前后两组患者美国脊髓损伤协会(American spinal injury association,ASIA)感觉功能、运动功能评分,功能独立性测量(the functional independent measure,FIM)评分以及体感诱发电位(somatosensory evoked potential,SEP)潜伏期。结果 两组治疗后ASIA感觉功能评分、运动功能评分,FIM评分均明显高于治疗前(P<0.05),SEP潜伏期低于治疗前(P<0.05)。两组治疗前后ASIA感觉功能评分、运动功能评分,FIM评分,SEP潜伏期差值比较,差异均有统计学意义(P<0.05)。结论 补益脾胃法结合虫类药能有效促进中后期脊髓损伤患者神经功能的恢复。 相似文献
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Graziela M. Biavati M.Sc. Fernando H. De Assis Santana M.Sc. José R. Pujol‐Luz Ph.D. 《Journal of forensic sciences》2010,55(6):1603-1606
Abstract: Although the Cerrado is the second major Brazilian biome, few studies have been undertaken about its entomofauna. Blowflies have an important role in forensic entomology, helping in the determination of postmortem intervals. The main goal of this exploratory study was to identify and to catalog the blowfly species associated with a pig carcass. The study was conducted in a pasture in Brasília, Distrito Federal. A pig (Sus scrofa) was killed with a .22 caliber shot in the frontal region of the head. Adult blowflies were surveyed daily from June 1 through 30, 2004. A total of 14,910 adult calliphorids were collected, representing eight species: Chrysomya albiceps, C. megacephala, Cochliomyia macellaria, Chloroprocta idioidea, Hemilucilia semidiaphana, H. segmentaria, Lucilia cuprina, and L. eximia. C. albiceps was the most frequent species, amounting to 94.76% of the catch. Five decomposition stages were observed, and for calliphorids, the most attractive stage was the bloated one. 相似文献
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Tal Simmons Ph.D. Peter A. Cross M.Sc. Rachel E. Adlam M.Sc. Colin Moffatt Ph.D. 《Journal of forensic sciences》2010,55(4):889-892
Abstract: This article reports results of a comparative study of decomposition rates of wild rabbit (Oryctolagus cuniculus) which were either (i) buried after exposure to insect activity, (ii) buried without exposure, (iii) kept above ground behind an insect screen, or (iv) continuously exposed above ground in a field experiment. Results showed that dipteran oviposition occurred consistently in groups i and iv only. Decomposition rates (measured by Total Body Score every c. 50 accumulated degree days [ADD]) of rabbits kept behind the screen and those buried without exposure showed no difference (p = 0.450). This was significantly slower than those buried after exposure (p = 0.0016) which was in turn significantly slower than those continuously exposed (p << 0.001). Temperatures collected from animals showed the presence of feeding larvae increased intra‐abdominal temperatures to >5°C above ambient. The findings support the assertion that insect presence is the primary agent affecting decomposition rate via tissue consumption and also the heat they generate. 相似文献
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