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Sex differences in lifespan have been labelled as one of the most robust features in biology. In human populations, women live consistently longer than men, a pattern that encompasses most mammalian species. However, when expanding both the taxonomic scope beyond mammals and the range of mortality metrics the female survival advantage over males is no longer the rule. Moreover, current evidence suggests that sex differences in actuarial ageing parameters (i.e. age at the onset of ageing and rate of ageing) are far from consistent across the tree of life. This chapter first reviews current knowledge of sex differences in mortality patterns across animals and appraises how these diverse patterns can be explained by the current evolutionary framework. It then emphasizes the relevance of going beyond the differences in mortality patterns by exploring how natural and sexual selection have shaped age- and sex-specific changes in reproductive performance and body mass across the tree of life, and by identifying some possible biological pathways modulating ageing in a sex-specific way. Finally, it highlights how evolutionary theories can be relevant to understand the widespread differences in causes of death between sexes, offering a complementary approach to gain a comprehensive understanding of the evolution of sex differences in health and ageing, with likely biomedical implications.
Over the past two decades there has been a rapid expansion in our understanding of how human genetic variability impacts susceptibility and severity of disease. Through applications of genome-wide association studies, genome and exome sequencing, researchers have made thousands of discoveries of genetic variants that impact risk of common and rare disorders affecting millions of people. Although these techniques have been primarily applied to highly prevalent chronic disorders such as diabetes1 and cardiovascular disease2, infectious diseases have proven to not be immune to genome-wide association, with studies of Tuberculosis3, HIV4 and SARS-CoV25, to name but a few, identifying host susceptibility loci across the genome. Unlike non-communicable diseases, infectious diseases have the unique element of impacting not only the affected the host, but those who may be most vulnerable to acquiring the infection. Thus, genetic variants that impact one individual’s susceptibility to and severity of an infection may also have broader implications to public health, as was brought into keen focus during the COVID-19 pandemic. Therefore, as we begin to apply the knowledge gained from genomic studies in the clinic or into policy, there are unique ethical, legal, and social implications (ELSI) at the intersection of infectious diseases and human genomics. In this issue of the Journal of Law, Medicine and Ethics, Jose et al attempt to address this need by proposing a research agenda for ELSI studies at what they term the “blurred boundaries” of infectious and genetic diseases.6
Edited by
David Kingdon, University of Southampton,Paul Rowlands, Derbyshire Healthcare NHS foundation Trust,George Stein, Emeritus of the Princess Royal University Hospital
Neuropsychiatry has a long and fascinating history as a discipline at the interface between neurology and psychiatry that combines clinical observations with modern investigational techniques. Historically, organic psychiatry has focused on clinical syndromes with regional connections affecting the four cortical lobes and the corpus callosum. Behavioural neurology has developed from early observations of classical neurocognitive syndromes, including aphasia, alexia, apraxia, agnosia and Gerstmann syndrome. A number of common neurological conditions often present with specific psychiatric symptoms: traumatic brain injury, cerebrovascular disease, brain tumours, epilepsy, movement disorders, infectious diseases and autoimmune neurological disorders such as multiple sclerosis, systemic lupus erythematosus and autoimmune encephalopathies. The differential diagnosis between delirium, dementia and pseudodementia can pose significant challenges. Finally, several toxic, metabolic and endocrine disorders can have clinically relevant neuropsychiatric manifestations.
This article examines the care provided for the welfare of soldiers by the three combatant countries – China, Korea and Japan – during the East Asian War of 1592–8. Also known as the Imjin War, this large-scale military conflict can also be understood as an encounter between different state cultures and strategies of military medicine. This study focuses on cold-induced injuries, epidemic outbreaks and external wounds suffered during the war. I illuminate provision of prophylactic measures against cold by the Ming state, as well as attempts by the Sino-Chosŏn medical alliance to manage epidemics and treat wounded soldiers. I contrast these measures with the lack of similar centralised support for the Japanese forces, and examine the effect these differences had upon on military outcomes during the war. The difference in the amount of time, efforts and resources that the three combatant states devoted to sick and injured soldiers has implications not only for our understanding of the war but also for illuminating the early modern history of military medicine in East Asia. By exploring East Asian military medicine during and after the Imjin War, this article responds to recent calls for more detailed examination of histories of military medicine in premodern periods and non-European regions.
Edited by
Alexandre Caron, Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), France,Daniel Cornélis, Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) and Foundation François Sommer, France,Philippe Chardonnet, International Union for Conservation of Nature (IUCN) SSC Antelope Specialist Group,Herbert H. T. Prins, Wageningen Universiteit, The Netherlands
There are only a few infections that cause disease and mortality in African buffalo. These include rinderpest (historically – now eradicated), anthrax, bovine tuberculosis, bovine brucellosis, bovine papillomatosis and possibly Rift Valley fever. Historically, buffalo were probably the original source and maintenance hosts of several important cattle diseases, namely the SAT strains of FMD and theileriosis caused by Theileria parva. More recently, cattle-adapted strains of these two diseases have evolved, and they now cycle in several areas of sub-Saharan Africa in the total absence of buffalo. Buffalo may also be important reservoirs of trypanosomes in tsetse fly-infested areas, and may be a source of heartwater rickettsias in open systems within the distribution range of the Amblyomma vector ticks. Buffalo are susceptible to a whole range of important livestock diseases, including bluetongue, epizootic haemorrhagic disease, peste des petits ruminants, bovine ephemeral fever, bovine viral diarrhoea and anaplasmosis, but large knowledge gaps remain. Although these pathogens can infect and replicate in buffalo, buffalo appear to play little or no role in the epidemiology and maintenance of these livestock diseases. Buffalo appear to be totally refractory to several important infections of livestock like lumpy skin disease, contagious bovine pleuropneumonia and dermatophilosis. Buffalo, like most wildlife species, naturally carry a complement of ecto- and endo- macroparasites. With few exceptions, most of these parasites do not appear to deleteriously affect the health of free-ranging buffalo in any way. They may, however, become a problem in intensive ranching systems.
As nurse practitioners and physician assistants (APPs) become more prevalent in delivering pediatric care, their involvement in antimicrobial stewardship efforts increases in importance. This project aimed to create and assess the efficacy of a problem-based learning (PBL) approach to teaching APPs antimicrobial stewardship principles.
Methods:
A PBL education initiative was developed after communication with local APP leadership and focus group feedback. It was offered to all APPs associated with Lurie Children’s Hospital of Chicago. Participants completed a survey which assessed opinions on antimicrobial stewardship and included knowledge-based questions focused on antimicrobial stewardship. Prescriptions for skin and soft tissue infections associated with APPs were recorded via chart review before and after the education campaign.
Results:
Eighty APPs participated in the initial survey and teaching initiative with 44 filling out the 2-week follow-up and 29 filling out the 6-month follow-up. Subjective opinions of antimicrobial stewardship and comfort with basic principles of AS increased from pre-intervention. Correct responses to knowledge-based assessments increased from baseline after 2-week follow-up (p < 0.01) and were maintained at the 6-month follow-up (p = 0.03). Simple skin and soft tissue infection prescriptions for clindamycin went from 44.4% pre-intervention to 26.5% (p = 0.2) post-intervention.
Conclusions:
A PBL approach for APP education on antimicrobial stewardship can be effective in increasing knowledge and comfort with principles of antimicrobial stewardship. These changes are maintained in long-term follow-up. Changes in prescribing habits showed a strong trend towards recommended empiric therapy choice. Institutions should develop similar education campaigns for APPs.
In the wake of the COVID-19 pandemic, the United States is actively reshaping parts of its national security enterprise. This article explores the underlying politics, with a specific interest in the context of biosecurity, biodefense, and bioterrorism strategy, programs, and response, as the United States responds to the most significant outbreak of an emerging infectious disease in over a century. How the implicit or tacit failure to recognize the political will and political decision-making connected to warfare and conflict for biological weapons programs in these trends is explored. Securitization of public health has been a focus of the literature over the past half century. This recent trend may represent something of an inverse: an attempt to treat national security interests as public health problems. A hypothesis is that the most significant underrecognized problem associated with COVID-19 is disinformation and the weakening of confidence in institutions, including governments, and how adversaries may exploit that blind spot.
The aim of this study was to investigate the occurrence of the disease and research risk factors through sociodemographic data of children aged 0 to 15 years, with symptoms suggestive of COVID-19 in 3 Brazilian municipalities in an international border region.
Methods:
Epidemiological and RT-PCR test results were collected from the COVID-19 notification records in suspected children and adolescents from March 1 to August 31, 2020, in municipalities (Assis Chateaubriand, Tupãssi, and Formosa do Oeste) located in an international border region. The results obtained and the variables associated were subjected to statistical analysis using the Chi-Square Test (x2) or Fisher’s Exact Test, using the statistical program SPSS v. 21.0 (IBM Corp., Armonk, New York, USA) at the 5% significance level.
Results:
Among the 147 children from the 3 municipalities, 20 (13.60%) were diagnosed as positive. The predominance of cases was in male children (60.00%) and in children living in urban areas (80%). The most frequent symptoms observed in children were fever (65.00% of the cases), followed by headache (60.00%), cough (55.00%), and nasal congestion, as well as sore throat, both found in 35.00% of the cases.
Conclusion:
All these data highlight the importance and the need for more epidemiological studies, especially in children and adolescents, as COVID-19 becomes part of the child health panorama worldwide, with serious direct and indirect impacts for humans, animals, and the environment.
Socio-economic, environmental and ecological factors, as well as several natural hazards, have repeatedly been shown to drive emerging infectious-disease risk. However, these drivers are largely excluded from surveillance, warning and response systems. This paper identifies, analyses and categorises 64 warning and response systems for infectious diseases. It finds that 80% of them are “reactive” – they wait for disease outbreaks before issuing an alert and implementing mitigating strategies. Only 6% of the warning and response systems were “prevention-centred.” These both monitored and were linked to strategies that addressed drivers of disease emergence and re-emergence. This paper argues that warning systems’ failure to conceptualise emerging infectious diseases as part of an integrated human, animal and environmental system stems from inadequate multi-sectoral collaboration and governance, compounded by barriers to data sharing and integration. This paper reviews existing approaches and frameworks that could help to build and expand prevention-centred warning and response systems. It also makes recommendations to foster multi-sectoral collaboration in governance and warning systems for infectious diseases. This includes proposing solutions to address compartmentalisation in international agreements, developing One Health national focal points and expanding bottom-up initiatives.
To evaluate risk factors for poor prognosis in vocal fold leukoplakia.
Methods
Clinical data were collected for 344 patients with vocal fold leukoplakia who received surgical treatment in our otolaryngology department from October 2010 to June 2019. Univariate and multivariate logistic regression analyses of the relevant factors were conducted.
Results
Among the 344 patients, 98 exhibited recurrence and 30 underwent a malignant change. Multivariate logistic regression analysis showed that size of the lesion (p = 0.03, odds ratio = 2.14), form of the lesion under white light (p < 0.001), surgical method (p < 0.001, odds ratio = 0.28) and pathological type (p < 0.001) were independent factors that affected the recurrence of vocal fold leukoplakia. In both univariate and multivariate analyses, the sole independent risk factor for malignant transformation of vocal fold leukoplakia was pathological type (p < 0.001).
Conclusion
The outlook for vocal fold leukoplakia depends on several clinical factors, especially pathological type. The more severe the pathological type, the more likely it is to recur or become cancerous.
In this book we explore how different kinds of parasites affected the key civilizations that flourished across the world over the last 10,000 years. Ancient parasites can be recovered from mummies, skeletons, latrines, coprolites, and chamber pots. Analysis may involve microscopy, ELISA, proteomics, and recovery of DNA. A huge range of parasites can infect humans, ranging from helminths (worms), single-celled protozoa such as malaria and dysentery, and ectoparasites such as lice and fleas. Different parasites will have varying impact upon health depending upon the proportion of a society affected and the physiological consequences of infection upon the body. Here the concept of Disabilit-Adjusted Life Years (DALYs) is employed to estimate the health impact of parasites in past societies, and compare them. This should allow us for the first time to propose which past civilizations may have experienced the greatest health burden from the parasites affecting their populations.
This study investigated the frequency of ear canal protection use and looked at its influence on external auditory exostosis severity and knowledge about external auditory exostosis among windsurfers and kitesurfers on the German coast.
Method
This retrospective cross-sectional study interviewed 130 windsurfers and kitesurfers along the German coast on knowledge of external auditory exostosis, exposure time, use of neoprene hoods and earplugs, and otological complaints. Participants underwent bilateral video-otoscopic examination.
Results
Knowledge of external auditory exostosis was ‘good’ or ‘excellent’ in 78 of 130 (60 per cent) individuals and ‘poor’ or non-existent in 52 of 130 (40 per cent) individuals. Knowledge was positively correlated with hours of exposure, otological complaints and frequency of ear canal protection use. A significant negative influence of neoprene hood use on external auditory exostosis severity was shown.
Conclusion
The positive effect of external auditory exostosis knowledge on the frequency of ear canal protection and the reduction of external auditory exostosis risk implies a need for health education on this topic.
Parasites have been infecting humans throughout our evolution. When complex societies developed, the greater population density provided new opportunities for parasites to spread. In this interdisciplinary volume, the author brings his expertise in medicine, archaeology and history to explore the contribution of parasites in causing flourishing past civilizations to falter and decline. By using cutting edge methods, Mitchell presents the evidence for parasites that infected the peoples of key ancient civilizations across the world in order to understand their impact upon those populations. This new understanding of the archaeological and historical evidence for intestinal worms, ectoparasites, and protozoa shows how different cultures were burdened by contrasting types of diseases depending upon their geographical location, endemic insects, food preferences and cultural beliefs.
This research letter introduces readers to health intelligence by conceptualizing critical components and providing a primer for research within political science broadly considered. Accordingly, a brief review of the literature is provided, concluding with possible future research agendas. The aim is to elaborate on the importance of public health intelligence to national security studies, and to political science more generally.
During the emergence of SARS-CoV-2 and the COVID-19 pandemic, public health officials exercised their police powers to combat the spread of the virus. The pandemic-related legal interventions adopted throughout the United States included lockdown orders and mask mandates. However, these policies and interventions meant to promote the general welfare of the public, in defense of common good, were met with legal challenges, especially in opposition to interventions’ impact on the exercise of religion. This article provides a legal analysis of the policies meant to curb the COVID-19 pandemic with a focus on legislative and judiciary actions and their implications for religious freedom. Ultimately, we hope this article will help inform future legal analyses on conflicts between public health and religious freedom in the context of pandemic legal preparedness efforts.
This systematic literature review aimed to provide an overview of the characteristics and methods used in studies applying the disability-adjusted life years (DALY) concept for infectious diseases within European Union (EU)/European Economic Area (EEA)/European Free Trade Association (EFTA) countries and the United Kingdom. Electronic databases and grey literature were searched for articles reporting the assessment of DALY and its components. We considered studies in which researchers performed DALY calculations using primary epidemiological data input sources. We screened 3053 studies of which 2948 were excluded and 105 studies met our inclusion criteria. Of these studies, 22 were multi-country and 83 were single-country studies, of which 46 were from the Netherlands. Food- and water-borne diseases were the most frequently studied infectious diseases. Between 2015 and 2022, the number of burden of infectious disease studies was 1.6 times higher compared to that published between 2000 and 2014. Almost all studies (97%) estimated DALYs based on the incidence- and pathogen-based approach and without social weighting functions; however, there was less methodological consensus with regards to the disability weights and life tables that were applied. The number of burden of infectious disease studies undertaken across Europe has increased over time. Development and use of guidelines will promote performing burden of infectious disease studies and facilitate comparability of the results.
Due to constraints in the dedicated health work force, outbreaks in peri-urban slums are often reported late. This study explores the feasibility of deploying Accredited Social Health Activists (ASHAs) in outbreak investigation and understand the extent to which this activity gives a balanced platform to fulfil their roles during public health emergencies to reduce its impact and improve mitigation measures.
Methods:
Activities of ASHAs involved in the hepatitis E outbreak were reviewed from various registers maintained at the subcenter. Also, various challenges perceived by ASHAs were explored through focus group discussion (FGD). During March to May 2019, 13 ASHAs involved in the hepatitis outbreak investigation and control efforts in a peri-urban slum of Nagpur with population of around 9000. In total, 192 suspected hepatitis E cases reported.
Results:
During the outbreak, ASHAs performed multiple roles comprising house-to-house search of suspected cases, escorting suspects to confirm diagnosis and referral, community mobilization for out-reach investigation camps, risk communication to vulnerable, etc. During the activity, ASHAs faced challenges such as constraints in the logistics, compromise in other health-related activities, and challenges in sustaining behavior of the community.
Conclusions:
It is feasible to implement the investigation of outbreaks through ASHAs. Despite challenges, they are willing to participate in these activities as it gave them an opportunity to fulfil the role as an activist, link worker, as well as a community interface.