Apport de l'immunoelectrophorese pour l'expertise des taches de sang en medecine legale

Conclusive evidence was obtained in this study that immunoelectrophoresis could be used in the identification of blood-stains in two particular cases: for diagnosis or approach to diagnosis of the age of a blood-stain, and for diagnosis of the human origin of a blood-stain that had been treated with petroleum products.Although many aspects should be investigated in more detail, it is certain that this method can be employed in combination with other methods.     

The forensic application of allozyme electrophoresis to the identification of blowfly larvae (Diptera: Calliphoridae) in southern Australia

Most known carrion-breeding species of blowflies in southern Australia are of the genus Calliphora. The morphological similarity of the immatures of these species means that correctly identifying them poses a challenge for forensic entomologists. This study investigates the potential of allozyme analysis to assist with this task. Molecular profiles of third-instar larvae and adults representing four of these carrion-breeding species, Calliphora stygia, C. dubia, C. hilli hilli, and C. vicina, were compared at 42 allozyme loci. The two life stages were found to display almost identical allozyme profiles in each species (93% of loci were expressed in both life history stages), enabling the reliable identification of larvae in these four species. Integration of these results with data from a previous study indicates that allozyme analysis would also be suitable for rapid, species-level identification of the larvae of six other carrion-breeding Calliphora species occurring in southern Australia. This is the first report of the application of allozyme data to the identification of forensically important blowflies.     

Venous air embolism in homicidal blunt impact head trauma. Case reports

From 1992 through 1997, there were 41 deaths by homicidal blunt impact head trauma in Hillsborough County, Florida. Twenty-one cases were excluded from the study because of putrefaction or survival beyond the emergency department doors, leaving 20 cases for the study. One of the 15 nonputrefied victims found dead at the scene and 1 of the 5 victims pronounced dead in the emergency department had definite venous air embolism. Victim 1 was found dead, bludgeoned with a concrete block, and had open vault and comminuted basilar skull fractures. The dura forming the right sigmoid sinus at the jugular foramen was lacerated. A preautopsy chest radiograph and examination under water documented gas in the pulmonary artery and right ventricle. Victim 2 was bludgeoned with a steel stake and was pronounced dead on arrival in the emergency department. He had open comminuted vault fractures, a transverse basilar skull fracture, and lacerations of the brain. Direct examination and preautopsy chest radiography revealed air in the right side of the heart. A third victim, with basilar fractures, had a small gas bubble in the pulmonary artery not detected by the case pathologist. A fourth victim, with a basilar skull fracture, had an unusual radiographic finding that was thought to be air in the posteromedial aspect of the lower lobe of the left lung but could not be excluded as an air embolus. Optimal postmortem documentation of venous air embolism includes the demonstration of the embolus and the site of air ingress. This study demonstrates that venous air embolism occurs in some victims of homicidal bludgeoning and suggests that when significant, it is easily demonstrated in the absence of putrefactive gas formation. The presence of venous air embolism can serve as evidence that a victim was alive and breathing at the time of the infliction of head wounds. In the belief that venous air embolism might be underdiagnosed in many medical examiner offices, the authors have sought to bring attention to the entity by publishing their experience with it in cases of bludgeoning.     

The political consequences of alienation-based and indifference-based voter abstention: Applications to Presidential Elections

We present a unified model of turnout and vote choice that incorporates two distinct motivations for citizens to abstain from voting: alienation from the candidates, and indifference between the candidates. Empirically, we find that alienation and indifference each motivated significant amounts of voter abstention in the 1980–1988 U.S. presidential elections. Using model-based computer simulations—which permit us to manipulate factors affecting turnout—we show that distinguishing between alienation and indifference illuminates three controversies in elections research. First, we find that abstention because of either alienation or indifference benefited Republican candidates, but only very modestly. Second, presidential elections involving attractive candidates motivate higher turnout, but only to the extent that abstention stems from alienation rather than from indifference. Third, paradoxically, citizens’ individual-level tendencies to abstain because of alienation are strongly affected by their evaluations of the candidates’ policies, whereas aggregate turnout rates do not depend significantly on the candidates’ policy platforms.     

Workplace Relations: Friendship Patterns and Consequences (According to Managers)

This article examines orientations toward workplace friendship. Based on a survey of senior managers in cities with populations over 50,000, it addresses the following questions: Do senior managers promote, condone, or discourage workplace friendship? What risks and benefits of workplace friendships do these managers perceive? What policies and strategies that affect workplace friendship are found in organizations? How do these organizational efforts affect perceptions of employee performance? This article finds that, despite the risks, orientations in favor of workplace friendships are widespread, and many jurisdictions engage in efforts to promote them.     

The Provider/Purchaser Split: A Report from New Zealand

This article focuses on a narrow topic: the provider/purchaser split. It discusses the theoretical arguments justifying the separation of state agencies providing goods and services from the agencies which purchase those services on behalf of government. It also discusses some of the main criticisms of the theory and briefly reviews application of the theory to reform of New Zealand's state sector provision of policy advice, health care and scientific services.     

Navigating the Future: A Case Study of Growing Victoria Together

In an increasingly volatile, uncertain and complex world governments internationally are seeking new frameworks to think about future directions which can guide policy choices that can be turned into realities. This article presents an insiders' case study of the initial development of the Victorian Labor government's Growing Victoria Together, launched in November 2001; it expresses the vision, policy priorities and its key progress measures. It has been developed to guide medium-term policy choices, communicate directions to citizens and engage stakeholders to think collaboratively about the future. The article notes the emerging international interest in alternatives to public policy paradigms based on economic rationality, market decision-making and organisational managerialism and outlines the steps and actions involved in developing its public release and the first stages of implementation. It concludes by reflecting on lessons which can be learned from this experience for exploring new strategic policy frameworks.     

Distinguishing Absentee Students from Regular Attenders: The Combined Influence of Personal,Family, and School Factors

In the present study, the relationship between student attendance and personal characteristics of the student, the student's family relations, and school variables were examined in a sample of 54 high school students. Consistent with earlier reports, t-tests revealed statistically significant relationships between school absence and many student, family, and school variables. The data were also analyzed using a stepwise discriminant analysis. The results showed that the absentee and regular attending students could be distinguished based on a combined set of 6 variables representing each of the three domains of student, family, and school characteristics. The results further revealed that several variables that were statistically significant in the univariate analyses failed to be retained in the discriminant analysis, suggesting that these variables did not contribute sufficient unique variance to warrant their inclusion in the discriminant function. The implications of school absence as a multifactored problem is discussed with respect to assessment and treatment effectiveness.     

Malaria deaths in the United States: case report and review of deaths, 1979-1998

Malaria is the world's most important parasitic disease, accounting for an estimated 300 to 500 million new cases and between 1.5 and 2.7 deaths annually. The majority of these deaths occur in sub-Saharan Africa where malaria is endemic and are the result of infection with Plasmodium falciparum. The number of deaths in the United States due to malaria is comparably much lower and involves so-called "imported" cases in which U.S. travelers acquire the infection upon travel to endemic areas and subsequently return to the United States or in which infected foreign citizens travel to the United States. There were a total of 118 deaths due to malaria in the United States between 1979 and 1998 with an average of 5.9 deaths per year. Specific epidemiological data provided by the CDC regarding the 40 deaths that occurred between 1992 and 1998 yielded the following results. Deaths occurred in patients ranging from 9 months to 89 years of age (median, 53 years). Thirty-eight (95%) of these were due to P. falciparum and two (5%) due to P. vivax. Anti-malarial chemoprophylaxis was taken in 40% of cases, not taken in 45% of cases, and unknown in 15% of cases. Twenty-four (60%) of the cases involved U.S. travelers to endemic areas, of whom 59% traveled to Africa, 25% to South America, 8% to India, 4% to Haiti, and 4% to unspecified areas. The remaining cases included eleven foreign travelers to the U.S. (27.5%), three induced cases (7.5%), and two undetermined cases (5%). Thirty-nine (98%) of the cases were diagnosed antemortem and only one case was known to have come to the attention of the medical examiner/coroner. An illustrative case report demonstrates many of the features associated with fatal malaria infections in the United States. The case involves a U.S. student who was studying in Africa and who, by report, had not taken antimalarial chemoprophylaxis. Despite seeking medical attention, the patient was not diagnosed with P. falciparum infection and cerebral malaria until the time of medico-legal autopsy, where the classic gross and microscopic features of cerebral malaria were identified. This case represents one of the few cases of P. falciparum infection in the United States not diagnosed antemortem. Given the worldwide prevalence of the disease, increasing international travel, and rapidly developing drug resistance, malaria will continue to be an important disease and should be considered in cases of sudden, unexplained deaths. By reviewing the major epidemiological features of malaria-related deaths in the United States and by presenting the major gross and microscopic features of cerebral malaria, an attempt is made at raising the awareness of the forensic community to the potential of malaria-related deaths.