On the reform of the personnel training mode of forensic medical undergraduates / 中华医学教育探索杂志

There are many problems in the training mode of traditional forensic undergraduates, such as the lag of curriculum setting, the lack of interdisciplinary and the lack of practical training. Based on the teaching practice of forensic undergraduates in Central South University, this study puts forward the following four reform schemes: ①advancing the setting of forensic medicine curriculum to strengthen the integration of specialized courses with basic medicine and clinical medicine courses; ②increasing related courses to intensify interdisciplinary teaching; ③introducing online teaching mode of virtual simulation to enrich the content of undergraduate forensic medical education; ④expanding the scope of joint classroom teaching inside and outside the school to realize the two-way rapid update of practical and theoretical resources. The purpose of this paper is to provide new ideas and directions for training forensic talents who are more suitable for the development of the times.

Genetic Polymorphisms of 21 STR Loci in Hunan Province-based Han Population / 法医学杂志

ObjectiveTo investigate the genetic polymorphisms of 21 short tandem repeat(STR)loci (D3S1358, D13S317, D7S820, D16S539, Penta E, D2S441, TPOX, TH01, D2S1338, CSF1PO, Penta D, D10S1248, D19S433, vWA, D21S11, D18S51, D6S1043, D8S1179, D5S818, D12S391 and FGA). Methods A total of 560 blood samples were collected from unrelated healthy individuals of Han population in Hunan Province. Chelex-100 extraction method was applied to the extraction of genomic DNA, and an AGCU EX22 Kit and 9700 STR amplification was used in amplification reactions. The products were separated and analyzed on 310 Genetic Analyzer.ResultsA total of 248 alleles were observed, the al-lelic frequencies ranging from 0.001 to 0.518. Observation of genotype distributions for each locus showed no deviations from Hardy-Weinberg equilibrium exceptPentaE(P=0.023). The combined pow-er of discrimination, combined power of exclusion, and combined matching probability of the 21 STR loci were approximately 0.999 999 999 999 999 999 999 999 8, 0.999 999 998, and 1.36×10-25, respectively. ConclusionThe 21 STR loci show high polymorphisms in the Han population, which can provide valu-able data and a theoretical basis for forensic individual identification and paternity testing.

Diagnosis of Amniotic Fluid Embolism with Blood Samples by Liquid-based Cy-tology Technique / 法医学杂志

Objective To establish the diagnosis of am niotic fluid em bolismwith blood sam ples by liq-uid-based cytology technique and to study the validity of m ethod. Methods The blood sam ples were collected from patients who suffered from am niotic fluid em bolism. The com ponents of am niotic fluid in blood samples were examined with blood smear by two direct smear methods(supernatant smear, sedi-ment smear) and two liquid-based cytology methods(autom atic smear, manual smear). The positive de-tection rate of each m ethod was calculated. Results The positive detection rates of two liquid-based cy-tology methods(84.6% and 92.3%, respectively) were m uch higher than those of two direct methods(53.8% and 61.5%, respectively). Conclusion The liquid-based cytology technique could im prove the positive detection rate of am niotic fluid em bolism.

Genetic Polymorphism of Nine Non-CODIS STR Loci in Hu-nan Province-based Chinese Han Population / 法医学杂志

Objective To determine the allelic frequency distribution and genetic parameters of nine non-CODIS DNA index systems of the short tandemrepeat (STR ) loci (D2S1772, D6S1043, D7S3048, D8S1132, D11S2368, D12S391, D13S325, D18S1364, and GATA198B05). Methods A total of 353 blood samples were collected, extracted, amplified, and analyzed fromunrelated healthy individuals of Han na-tionality in Hunan Province, China. Results O ne hundred and fourteen alleles were observed in the pop-ulation with corresponding allelic frequencies ranged from0.001 0 to 0.323 0. For all the nine non-CODIS STR loci, the observed genotypic data showed no significant deviations fromthe Hardy-W einberg equi-librium. The Ho, He, PIC, D P, and PE of the studied non-CODIS STR loci ranged from0.108 0 to 0.195 0, 0.805 0 to 0.892 0, 0.770 0 to 0.860 0, 0.925 0 to 0.966 0 and 0.607 0 to 0.780 0, respectively. Conclusion N ine non-CODIS STR loci have high degrees of polymorphisms, which may be useful in in-dividual forensic identification and parentage testing in forensic practice.

Tuberculous Abdominal Aortic Aneurysm with Alimentary Tract Hemorrhage：A Case Report with Medico-legal Impli-cations / 法医学杂志

An autopsy case of sudden death induced by alimentary tract hemorrhage was presented, which was caused by the unexpected rupture of clinically unrecognized tuberculous abdominal aortic a-neurysm (TAAA). The initial diagnosis was made of the syndrome of coronary heart disease and hyper-tensive disease. The detailed autopsy showed that the alimentary tract hemorrhage was caused by a sud-den rupture of the mass after posture changing was ascertained as the cause of death. The diagnosis of TAAA was determined by the autopsy findings. Analysis for the medical dispute of TAAA was de-scribed, and the difficulty of the diagnosis and medico-legal implications were also discussed.

Identification of forensically important arthropods on exposed remains during summer season in northeastern Egypt / 中南大学学报(医学版)

OBJECTIVE@#To document the arthropod succession pattern and to identify forensically important species in northeastern Egypt (32° 15' E and 30° 36' N) for the first time.@*METHODS@#Carcasses were exposed in an open area for 60 days during summer season. Ambient daily temperature (maximum and minimum) and relative humidity (RH) were recorded and existing keys were used for identification of different species.@*RESULTS@#During the period of study, the mean of maximum and minimum temperatures were 34.85 °C and 29.2 °C respectively, while the mean of RH was 53.5%. Four stages of decomposition were observed: fresh, bloat, decay and dry. The most abundant orders were found to be Diptera, Coleoptera and Hymenoptera. Arthropods were collected belonging to 4 families of Diptera: Muscidae, Fanniidae, Calliphoridae and Sarcophagidae. While there were 2 families of Coleoptera: Dermestidae and Histeridae. Monomorium species was the only Hymenoptera family in this study.@*CONCLUSION@#The present work provided a basis for further studies dealing with insect colonization of carcasses in different seasons and locations in Egypt.

Identification of common Sarcophagidae by short cytochrome oxidase I fragment / 中南大学学报(医学版)

OBJECTIVE@#To identify the common Sarcophagidae with a 278 bp fragment of cytochrome oxidase I in mitochondrial DNA and to obtain an unambiguous and rapid identification method for Sarcophagidae in forensic investigations.@*METHODS@#Nineteen Sarcosaprophagous flies were collected from 16 locations in 12 Chinese provinces. All specimens were comprised of 4 species. The mtDNA of flies was extracted with SDSPK extraction method. Polymerase chain reaction was conducted in an Eppendorf 5331 thermal cycler. The PCR products were purified and sequenced and the obtained sequences were uploaded to GenBank. A neighbor-joining tree was constructed with MEGA4.0 package.@*RESULTS@#The 19 Sarcosaprophagous flies were well clustered. The intraspecific variation within species varied from 0% to 3%, while the interspecific variations between species varied from 8% to 12%.@*CONCLUSION@#Congeneric species can be separated by the short fragment (278 bp region in the cytochrome oxidase subunit I gene), which will be instrumental for implementation of the Chinese Sarcophagidae database and lay a foundation for post mortem interval estimation in future forensic cases.

Construction and function of forensic interest group for medical students of eight-year-program / 中华医学教育探索杂志

The aim of the eight year medical education program is to cultivate high-leveled and high qualified clinical and research personnel.Constructing forensic interest group for medical students of eight year program can not only cultivate the students' English learning,innovative thinking and practice ability,which is their Achilles heel but also combine eight year medical education with forensic science teaching reform.

To investigate the role of forensic science in 8-year-program medical education / 中华医学教育探索杂志

Eight-year-system medical education is a kind of elite education. The object of this education model is to train medical personnel with medical doctorate. Forensic science is a highly practical medical discipline, closely related with the clinical medicine. This paper performs some explorations of the role of forensic science in 8-year-program medical education. Eight-year-program medical education should be combined with the high practicality of forensic science. For the Eight-year-program students, we should focus on cultivating their creative ability, practical ability, and sense of self-protection.

Sequencing of mitochondrial DNA cytochrome oxidase subunit I gene in sarcosaphagous flies from 14 provinces in China / 中南大学学报(医学版)

OBJECTIVE@#To detect the 278 bp region of gene of the cytochrome oxidase subunit I (COI) in mitochondral DNA (mtDNA) of sarcosaphagous flies, identify the species of sarcosaphagous flies, and provide reference for forensic application.@*METHODS@#Samples were collected in Baotou and Chifeng of Inner Mongolia, Tianjin, Nanning, Fuzhou, Linyi of Shandong, Shijiazhuang, Yinchuan, Lanzhou, Huairou of Beijing, Xinxiang and Nanyang of Henan, Datong of Shanxi, Wuhu of Anhui, Quzhou of Zhejiang, Changsha, Zhuzhou and Yongzhou of Hunan. A total of 38 flies were randomly collected from rabbits, dogs and pigs which were set outdoors, then the flies' mitochondrial DNA (mtDNA) were extracted by the improved small insects DNA homogenate method. Amplification was conducted by Perkin-Elmer 9600 thermal cycler, then vertical non-denaturing 7% polyacrylamide gelectrophoresis. PCR products were purified using the nucleic acid purification kit. Sequences of both strands were obtained by direct sequence of the double-stranded PCR product using one of the PCR primers and the ABI PRISM big dye terminator cycle sequencing dit. Sequence reactions were electrophorsed on ABI Model 3730 DNA Sequencers. A UPGMA tree was contrasted using the maximum composite likelihood method in MEGA4.@*RESULTS@#The 38 sarcosaphagous flies belonged to 3 families(Muscidae, Calliphoridae, and Sarcophagidae), 10 genuses (Musca Linnaeus, Hydrotaea Robineau-Desvoidy, Aldrichina Townsend, Hemipyrellia Townsend, Achoetandrus Bezzi, Protophormia Townsend, Chrysomya Robineau-Desvoidy, Lucilia Robineau-Desvoidy, Helicophagella Enderlein, and Boettcherisca Rohdendorf), and 12 species [Musca domestica (Linnaeus), Hydrotaea (Ophyra) capensis (Wiedemann), Lucilia caesar (Linnaeus), Lucilia illustris (Meigen), Aldrichina graham (Aldrich), Hemipyrellia ligurriens, Achoetandrus (Chrysomya) rufifacies (Macquary), Protophormia terraenovae (Robineau-Desvoidy), Chrysomya megacephala (Fabricius), Lucilia sericata (Meigen), Helicophagella melanura (Meigen), and Boettcherisca peregrine (Robineau-Desvoidy)].@*CONCLUSION@#The genus of the sarcosaphagous flies can be identified by 278 bp gene sequence analysis of CO I in mtDNA. This method is rapid, convenient and precise.