The effect of bleaching agents on the DNA analysis of bloodstains on different floor coverings.

Blood at crime scenes is one of the most significant traces of evidence in investigation proceedings. Cleaning up these traces with household cleaning products, often containing bleaching agents, inhibits or complicates the detection of DNA. In this study, human blood was applied onto different floor coverings (carpet, laminate, parquet, PVC, tile) and subsequently cleaned with water and bleaching agents (hydrogen peroxide, sodium hypochlorite, DanKlorix®, Vanish Oxi Action®) at different times. Samples have been collected afterwards from the floors. The samples underwent a quantitative and qualitative DNA analysis. Cleaning smooth surfaces with water is usually sufficed to prohibit retrieving a DNA profile in most of the cases. Cleaning carpets was more difficult due to their absorbent surface whereas the use of bleaching agents caused an additional reduction of verifiable DNA concentrations. Retrieving partial or complete profiles after the use of bleaching agents was only possible when cleaning with low concentrations of 3% hydrogen peroxide.

[Postmortem imaging of the lung in cases of COVID-19 deaths]. / Postmortale Bildgebung der Lunge bei COVID-19-Todesfällen.

CLINICAL/METHODOLOGICAL ISSUE: COVID-19 is a new viral disease that is associated with inflammatory pulmonary changes which can be detected in computed tomography (CT). So far postmortem CT (PMCT) has not been used as a screening instrument for the evaluation of deaths with and without autopsy. In this respect, its validity has to be proved in comparison to clinical-radiological experiences. STANDARD RADIOLOGICAL METHODS: Postmortem CT METHODICAL INNOVATIONS: So far, PMCT can be regarded as a methodological innovation that has not yet been sufficiently evaluated for pneumonia. PERFORMANCE: CT in clinical routine has a high sensitivity for pneumonia. However, to what extent postmortem artifacts are relevant to PMCT still has to be determined. ACHIEVEMENTS: There is still no standard procedure for the postmortem radiological diagnosis of COVID-19 disease. Despite postmortem artifacts, PMCT can provide valuable information about the presence of pneumonia with interstitial character, especially without autopsy. PRACTICAL RECOMMENDATIONS: PMCT is particularly useful in the assessment of suspected cases of COVID-19 pneumonia for morphological assessment in the context of monitoring deaths in the current pandemic situation.

[Complex cutaneous Leishmaniasis from the "Old World" : Therapeutic challenges in two complicated disease courses]. / Komplexe kutane Leishmaniasis der Alten Welt : Therapeutische Herausforderungen bei 2 komplizierten Verläufen.

Here we describe two complicated cases of complex Old World cutaneous Leishmaniasis due to L. infantum and L. aethiopica. Both of our patients infected with the Leishmania parasite presented with a completely different clinical picture, course of disease, and treatment response. Clinical healing was achieved after multiple courses of treatment with a variety of different antileishmanial drugs. Nephrotoxity was a limiting side effect.

Detection of blood and DNA traces after thermal exposure.

The analysis of blood traces is often of significant reconstructive and evidence-gathering importance. Perpetrators deliberately set fires to destroy evidence. There is little literature regarding the effect of fire and extreme heat on blood and the detection of blood. Blood and DNA are believed to be no longer traceable after exposure to a temperature of 1000 °C. This study exposed different objects of a standardized procedure to temperatures of 300, 700, and 1000 °C. It documented the influence of heat on blood traces through the use of luminol. DNA analysis confirmed that fewer DNA profiles can be created with increasing temperature. However, even after exposure up to a max. of 1000 °C, it was still possible to produce a complete DNA pattern from approx. 60% of the samples. Consequently, crime scenes that have been destroyed by fire should be evaluated with the same attention to detail as the unburned areas.

[Hereditary cardiac amyloidosis with transthyretin mutations. A cause of sudden death ]. / Hereditäre kardiale Amyloidosen mit Mutationen des Transthyretin. Ursache des plötzlichen Todes.

Hereditary amyloidoses present a clinically and genetically heterogeneous group of autosomal dominant diseases. The most frequent form is associated with mutations of the transthyretin gene. The type of mutation determines the process, the organs primarily involved as well as the time of onset of the disease. Life expectancy is generally limited by the degree of cardiomyopathy. The cases of two male patients who died suddenly and unexpectedly are presented. In both cases, autopsy revealed a biventricular cardiac hypertrophy. Cardiac amyloidosis was diagnosed by means of histologic and genetic analysis. Early diagnosis is essential for those affected, since liver transplantation still represents the only effective treatment. This illustrates the benefit of autopsy investigations for surviving relatives, who may themselves be affected by the disease.

[SARS-CoV-2-associated deaths in adult persons up to 50 years of age]. / SARS-CoV-2-assoziierte Todesfälle von erwachsenen Personen bis 50 Jahre: Eine retrospektive Auswertung der COVID-19-assoziierten Todesfälle im Jahr 2020 im Institut für Rechtsmedizin Hamburg, Deutschland.

INTRODUCTION: Several evaluations of deaths in persons of advanced age associated with SARS-CoV­2 can be found in the international literature. The aim of this work was the evaluation of deaths associated with SARS-CoV­2 of persons of younger or middle age (up to 50 years) at the Institute of Legal Medicine in Hamburg, Germany, with presentation of frequency, comorbidities and disease courses. MATERIAL AND METHODS: A total of 735 SARS-CoV-2-associated cases of decedents with registered addresses in Hamburg were evaluated in 2020 at the Institute of Legal Medicine in Hamburg, Germany, using various examination methods. The selection and performance of the respective methods was based on the consent given by the relatives. In addition, more autopsies of decedents with a registered address outside Hamburg and positive SARS-CoV­2 detection were performed. RESULTS AND CONCLUSION: Of the 735 decedents 9 with a registered Hamburg address and 3 of the deaths studied with an external registered address (n = 12; 7 men and 5 women) were aged 50 years or younger, with an average age of 39.8 years. Essentially, there were cardiovascular, neurological, and malignant pre-existing diseases, as well as obesity. The SARS-CoV­2 was detected post-mortem for the first time in two cases; these were found to have a virus-independent cause of death. Of the individuals 7 died from COVID-19 pneumonia, 3 individuals from the consequences of the necessary intensive medical treatment.Several studies have demonstrated an association between obesity and severe SARS-CoV-2-related disease progression, particularly in younger patients and this was confirmed in the legal medicine study population.

COVID-19 lungs in post-mortem computed tomography.

Post-mortem computed tomography (PMCT) is a rapid and noninvasive diagnostic tool for important contributions to the identification of pulmonary findings in the deceased with pneumonia, including cases of coronavirus disease 2019 (COVID-19). Although computed tomography (CT) shows a high sensitivity for pneumonia in living persons, it is relatively unspecific for COVID-19 pneumonia clinically. Typical CT findings for viral pneumonia therefore require confirmation by PCR tests (polymerase chain reaction tests), even if lung infections with severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2) show characteristic patterns, most frequently ground glass opacities (GGO) and a combination of GGO and air space consolidations. In the consecutive autopsy series of SARS-CoV­2 deaths from Hamburg, Germany, the most frequent cause of death was and still is COVID-19 pneumonia. Typical findings were frequently found in the PMCT in SARS-CoV-2-associated deaths, which were taken into account when classifying the death as COVID-19.

Evidence for systematic autopsies in COVID-19 positive deceased: Case report of the first German investigated COVID-19 death.

Forensic medicine and pathology involve specific health risks, whereby health workers are dealing with microorganisms, cells or parasites, which are referred to as biological agents. Biological agents are divided into four categories according to § 3 of the Biological Agents Ordinance. The newly identified coronavirus, severe acute respiratory syndrome, coronavirus 2 (SARS-CoV-2) that has spread rapidly around the world is placed into category 3 of the Biological Agents Ordinance, meaning pathogens that can cause serious illnesses in humans and may pose a risk to workers. The Robert Koch Institute, the German government's central scientific institution in the field of biomedicine issued the announcement, that aerosol-producing measures (including autopsies) of SARS-CoV­2 infected bodies should be avoided, despite the fact that autopsies are an important source of understanding the pathomorphological course of new diseases. The first German case of death due to a proven SARS-CoV­2 infection is presented with global multifocal reticular consolidation in the post-mortem computed tomography (CT) scan, a macroscopic and microscopic viral pneumonia and viral RNA of SARS-CoV­2 in pharyngeal mucosa and lung tissue.

[The first COVID-19 hotspot in a retirement home in Hamburg]. / Der erste COVID-19-Hotspot in einer Hamburger Senioreneinrichtung: Präventionskonzept, Letalität und Obduktionsbefunde.

Background: Coronavirus disease 2019 (COVID-19), a disease caused by the new coronavirus (SARS-CoV-2), is a particular threat to old people. At the end of March 2020, the first and so far largest outbreak of the disease occurred in a retirement home in Hamburg. Methods: Analysis of procedures in dealing with a residential unit affected by SARS-CoV­2, accommodating a risk group of 60 seniors with dementia is presented as well as a detailed presentation of post-mortem examination results of all 8 deceased tested positive for SARS-CoV­2. Results: Out of 60 residents, 39 were infected by SARS-CoV­2. Due to preventive procedures it was possible to stop further spreading of the infection to other residential areas. In all 8 fatal cases, the autopsy diagnosis was death due to COVID-19. Autopsies revealed all COVID-19 patients to have a fatal (broncho)pneumonia and signs of relevant pre-existing cardiac, renal and pulmonary conditions in all cases. In 75% (n = 6) of the cases a fresh venous thrombosis was found. In 66.7% (n = 4) of the cases thrombotic events were combined with peripheral pulmonary artery thromboembolisms. Conclusion: The cohort of SARS-CoV­2 infected residents of a nursing home is characteristic for clinical and epidemiological features of the new coronavirus disease. Due to a centralized evaluation of all fatalities at the Institute of Legal Medicine in Hamburg, a detailed examination of all deceased positive for SARS-CoV­2 was possible. Thereby, increased case fatality rates of approximately 20% could in all cases be assigned to a relevant number of pre-existing comorbidities of multiple organ systems, which was consistent with the clinical data available.

[Alcohol, the aged and traffic]. / Alkohol, Alter und Verkehr.

The roadworthiness of older people is affected by internal, neurological or orthopedic diseases and by the medication. These factors have an effect on alcohol tolerance. Therefore, alcoholization in elderly drivers needs specific attention. A retrospective evaluation of all alcoholized traffic participants > 60 years of age between 2003-2008 in Hamburg is described. The data analysis gives information about the alcohol level in various age groups, the resulting neurological/physiological deficits, chronic illnesses and the medications taken. The proportion of elderly people involved in a traffic delinquency has increased. However, the absolute number of old drunk drivers has decreased. Seniors are represented significantly less often concerning alcohol in traffic than other age groups.

Criminal corpse dismemberment in Hamburg, Germany from 1959 to 2016.

Cases of corpse dismemberment are rare, but occur most frequently in urban agglomerations. A distinction is made between defensive and offensive corpse dismemberment. This systematic review retrospectively assesses the phenomenology of 51 cases of corpse dismemberment (30 defensive and 21 offensive), which occurred in a period of 57 years and were subject to medico-legal autopsies performed at the Departement of Legal Medicine in Hamburg, Germany. The victims' gender ratio was 1.7:1 female to male. In most cases, the perpetrators were middle-aged men from the close social environment, who had no psychiatric primary illnesses, no experience in the medical sector, and had not worked professionally as a butcher. In 80% of the cases it was possible to establish the cause of death; the most frequent cause was injuries sustained through sharp force (15 cases). The cases are discussed within the context of the existing international literature on corpse dismemberment.

Ovarian hormones and binge eating: exploring associations in community samples.

BACKGROUND: Significant associations between changes in ovarian hormones and binge eating are present across the menstrual cycle in women with bulimia nervosa. However, no study has examined these relationships in a non-clinical sample, despite the need for these data for designing risk-factor studies. METHOD: In study 1, we modified several continuous measures of binge eating and identified those that were most sensitive to menstrual-cycle fluctuations in a non-clinical sample of 10 women who completed measures for 35 days. In study 2, we explored associations between ovarian hormones and binge-eating scores in nine women who completed these same measures for 65 days and provided daily saliva samples for assays of estradiol and progesterone concentrations. RESULTS: In study 1, the Emotional Eating subscale of the Dutch Eating Behavior Questionnaire exhibited superior reliability and was most sensitive to predicted menstrual-cycle changes in binge eating (i.e. increased scores in the mid-luteal/premenstrual compared with follicular/ovulatory phases). In study 2, this scale showed predicted inverse associations with estradiol and positive associations with progesterone across the menstrual cycle that could not be accounted for by changes in negative affect. CONCLUSION: Associations between ovarian hormones and binge eating are robust and present in clinical and non-clinical samples. Findings support the ability to examine the role of ovarian hormones as risk factors for binge eating in large-scale prospective studies and twin studies.

Microbial decomposition of elm and oak leaves in a karst aquifer.

Dry Chinquapin oak (Quercus macrocarpa) and American elm (Ulmus americana) leaves were placed in four microcosms fed by groundwater springs to monitor changes in dry mass, ash-free dry mass, and microbial activity over a 35-day period. Oxygen microelectrodes were used to measure microbial activity and to estimate millimeter-scale heterogeneity in that activity. Oak leaves lost mass more slowly than elm leaves. Generally, there was a decrease in total dry weight over the first 14 days, after which total dry weight began to increase. However, there were consistent decreases in ash-free dry mass over the entire incubation period, suggesting that the material remaining after initial leaf decomposition trapped inorganic particles. Microbial activity was higher on elm leaves than on oak leaves, with peak activity occurring at 6 and 27 days, respectively. The level of oxygen saturation on the bottom surface of an elm leaf ranged between 0 and 75% within a 30-mm area. This spatial heterogeneity in O(2) saturation disappeared when the water velocity increased from 0 to 6 cm s. Our results suggest that as leaves enter the groundwater, they decompose and provide substrate for microorganisms. The rate of decomposition depends on leaf type, small-scale variations in microbial activity, water velocity, and the length of submersion time. During the initial stages of decomposition, anoxic microzones are formed that could potentially be important to the biogeochemistry of the otherwise oxic aquifer.