Health Risk Management Research Articles

Occupational health risk recognition, evaluation, and management of radiation workers in Gansu province, China

ObjectiveIn order to protect the health of radiation workers, scientific management of radiation workplace protection is implemented, and occupational health risks of radiation workplaces in Gansu Province, China are identified and evaluated through monitoring. MethodsThe basic situation of occupational health management of radiological workers in 1366 radiological diagnosis and treatment institutions was investigated, and 596 monitoring hospitals were selected for occupational health monitoring. Using a 2-IN∗2-in NaI (Tl) scintillation spectrometer and its supporting software, internal thyroid irradiation monitoring was performed. Fifty-one underground workers in a deep mine iron mine were selected to monitor the effect of high radon exposure. Results11 (6%) monitored hospital interventional radiology staff detected lead outside the aprons between 5 mSv and 20 mSv during a single monitoring period; In nuclear medicine, radiation monitoring in the thyroid detected 3(15%) people with doses between 5 mSv and 20msv.The chromosome aberration rate and Detection rate of posterior pole subcapsular opacification of interventional radiation group and nuclear medicine group was higher than that of conventional radiation group, and the difference between interventional radiation group and conventional medicine group was statistically significant. Abnormal detection of tumor markers in serum after sustained radon exposure accounted for 39.2% of NSE(neuron-specific enolase), 22.5% of SCC(squamous cell carcinoma associated antigen), and 5.9% of CyFRA21-1(cytokeratin 19 fragment), respectively, chest low-dose CT showed plaque and stripe shadow in 21 cases (41.2%) and nodules in 16 cases (31.4%). ConclusionIndividual dose monitoring found that radiation workers engaged in interventional radiology were exposed to higher doses and had higher occupational risks. The results of occupational health examination show that there is a certain degree of radiation injury in interventional radiology and nuclear medicine workers. Nuclear medicine radiation monitoring results show that some workplaces have radioactive contamination. The radon exposure of deep mine miners has a higher occupational risk of lung cancer caused by high radon.The analysis of chromosome aberration is an important index of occupational health monitoring of radiation workers.

Analysis of The Implementation of The Occupational Safety and Health Management System at Bhayangkara Kendari Hospital

Background: The occupational safety and health management system is part of the overall management system in the context of controlling work-related risks in order to create a safe, efficient and productive workplace. The aim of this research is to analyze the implementation of the occupational safety and health management system in hospitals. According to the management report of the Occupational Safety and Health committee at Bhayangkara Kendari Hospital in 2023, it was stated that the hospital had not carried out occupational risk management as part of the hospital’s occupational safety and health planning. Method: This research is a qualitative descriptive research method. There were 11 informants in the research. The sampling technique used was purposive sampling. Results: The results of the research show that Bhayangkara Kendari Hospital has implemented an Occupational Safety and Health Policy and Occupational Safety and Health risk management planning, but the results obtained in the Implementation of Occupational Safety and Health, Monitoring and Evaluation in the Hospital’s Occupational Safety and Health program do not meet standards. Optimal Occupational Safety and Health. Conclusion: Bhayangkara Kendari Hospital has implemented the Hospital Occupational Safety and Health policy in accordance with Minister of Health Regulation No. 66 of 2016 with a commitment to implementing Occupational Safety and Health, but is hampered by the unavailability of special health services. There are still health workers who provide health services without using personal protective equipment, and there are still those who violate the KTR and there are no monthly and annual evaluation reports on Hospital Occupational Safety and Health. This research can be used as reference material for hospitals to optimally implement Hospital Occupational Safety and Health to increase the knowledge of health workers in implementing occupational safety and health by familiarizing themselves with occupational safety and health cultural behavior.

Intelligent Systems Integrating BIM and VR for Urban Subway Microenvironmental Health Risks Management

With the rapid development and construction of urban subways, various risks associated with human health and wellbeing within subway microenvironments have seriously increased. However, only a few intelligent systems have been validated as suitable for facilitating the management of subway environments. Field tests can be time-consuming and inefficient, and questionnaires often lack true intuitiveness for participants. Therefore, to enhance subway environment management, this study proposed intelligent systems that integrate building information modeling (BIM) and virtual reality (VR) for managing health risks in urban subway microenvironments. The systems were developed using Revit 2021, Navisworks 2020, Unity 2019, MYSQL 8.0, and Visual Studio 2019. Additionally, they were applied in scenarios for environmental assessment and passenger coping capability enhancement, differentiated into an expert visual-based health risk assessment system and a gamified simulation system for passenger risk prevention. The feasibility of the approach was validated with the case of Xinzhuang subway station of Line 3 in Nanjing, China. The findings revealed that the assessment system enabled experts to have a better and straight understanding of subway microenvironmental health risks and the gamification simulation system significantly enhanced the passengers’ coping capacity. The integration of BIM and VR, with its design features such as visibility, optimization, and simulation, compensated for BIM’s lack of providing an immersive experience for systems. The intelligent systems introduced in this study present novel models for environmental assessment and passenger training, catering to both subway operators and researchers. The innovative systems serve as a cornerstone in guaranteeing the health and safety of public transportation operations.

Food, bodies, health (risks): the biopolitics of organic materiality testing in the context of diet-associated health risk management practices

This article analyses the apparatus of practices dedicated to reducing long-term diet-associated health risks so as to question how risk is framed and worked upon in everyday risk governance contexts. In 2020–2021, I conducted 10 semi-structured interviews with public & environmental health researchers and programme managers at both federal (Canada) and provincial (Quebec) levels, as well as with clinical practitioners (clinical physician, dietician). I also used these interviews and the information provided by my interviewees to gather a corpus of materials comprised of clinical protocols, empirical guidelines, governmental screening programmes, and more. In the analysis, I contrast testing practices dedicated to preventing and controlling chronic conditions associated with food ingestion such as type 2 diabetes, with others dedicated to predicting and preventing health conditions associated with the ingestion of pesticides and contaminants. I use Foucauldian discourse analysis methods as well as Sheila Jasanoff’s (1999) “songlines of risk” in her analysis of environmental risk assessment practices to analyse how the risk mitigation practices under study integrate different approaches to risk and thus different ways of caring for health and bodies. This leads me to a discussion on the biopolitical approach to risk and health that informs these practices and the apparatus they constitute, contributing to orienting where the onus of the responsibility lies when it comes to managing or preventing diet-associated health conditions. I argue that the apparatus plays a role in invisibilizing the environmental factors in disease causation and reinforcing the individualisation of health (responsibility) rather than its collectivisation.

Understanding how young people transitioning from out-of-home care acquire and develop independent living skills and knowledge: A systematic review of longitudinal studies.

Young people leaving state care often experience hardship in many areas of their life. At a population level, their outcomes in early adulthood are poorer compared to general populations. Effective preparation for leaving care and post-care support systems is vital to improving outcomes. Individual and systemic support for young people to acquire Independent Living Skills (ILS) in the following eight ILS domains have been identified: Financial Management, Knowledge of Accessing Available Supports, Managing Housing, Education Planning, Job Seeking, Health Risk Management, Domestic and Self-help Task, and Managing Relationships. This systematic review aims to identify, summarise, and appraise longitudinal studies that address ILS across these ILS domains to understand better how outcomes could be improved. Seven databases (CINAHL, Embase, ProQuest, PsychINFO, PubMed, Scopus, and Web of Science) were searched on 20th July 2023. In total, twenty-seven studies published between 1994 and 2022 from various countries met the eligibility criteria. The included studies reported on 2-4 waves and adopted different methodological approaches. Study quality was scored using Qualsyst. Study characteristics and details of the interventions are presented in tables. Studies cover overlapping ILS domains, which are mapped in a matrix. Results revealed that nearly three-quarters (74% or 20 out of 27) of studies explored four or fewer of the eight ILS domains. The most frequent ILS domain covered was 'Knowledge of Accessing Available Supports' (19/27 studies). The main conclusion considers the concept of independence as a misnomer, with ILS covering multiple, intersecting, and interdependent domains, which ultimately help and hinder one another. Further research is required to adopt a more comprehensive approach encompassing all the domains to better inform policy, programs, and practice. A limitation is that a meta-analysis was not conducted for this review. This study registered a 'Protocol' with OSF Registries (DOI: 10.17605/OSF.IO/MJ3ZX) on June 5th, 2022.

Virulent properties and genomic diversity of Vibrio vulnificus isolated from environment, human, diseased fish.

The incidence of Vibrio vulnificus infections, with high mortality rates in humans and aquatic animals, has escalated, highlighting a significant public health challenge. Currently, reliable markers to identify strains with high virulence potential are lacking, and the understanding of evolutionary drivers behind the emergence of pathogenic strains is limited. In this study, we analyzed the distribution of virulent genotypes and phenotypes to discern the infectious potential of V. vulnificus strains isolated from three distinct sources. Most isolates, traditionally classified as biotype 1, possessed the virulence-correlated gene-C type. Environmental isolates predominantly exhibited YJ-like alleles, while clinical and diseased fish isolates were significantly associated with the nanA gene and pathogenicity region XII. Hemolytic activity was primarily observed in the culture supernatants of clinical and diseased fish isolates. Genetic relationships, as determined by multiple-locus variable-number tandem repeat analysis, suggested that strains originating from the same source tended to cluster together. However, multilocus sequence typing revealed considerable genetic diversity across clusters and sources. A phylogenetic analysis using single nucleotide polymorphisms of diseased fish strains alongside publicly available genomes demonstrated a high degree of evolutionary relatedness within and across different isolation sources. Notably, our findings reveal no direct correlation between phylogenetic patterns, isolation sources, and virulence capabilities. This underscores the necessity for proactive risk management strategies to address pathogenic V. vulnificus strains emerging from environmental reservoirs.IMPORTANCEAs the global incidence of Vibrio vulnificus infections rises, impacting human health and marine aquacultures, understanding the pathogenicity of environmental strains remains critical yet underexplored. This study addresses this gap by evaluating the virulence potential and genetic relatedness of V. vulnificus strains, focusing on environmental origins. We conduct an extensive genotypic analysis and phenotypic assessment, including virulence testing in a wax moth model. Our findings aim to uncover genetic and evolutionary factors that drive pathogenic strain emergence in the environment. This research advances our ability to identify reliable virulence markers and understand the distribution of pathogenic strains, offering significant insights for public health and environmental risk management.

Practitioners’ perspectives on health and safety risk management in the Ghanaian oil and gas industry

Risk management has been regarded as one way to improve workplace health and safety conditions. However, very little research has been published on the perspectives of practitioners on safety risk management in general and the Ghanaian oil and gas industry in particular. This study bridges this literary gap by presenting findings from an online survey that investigated the perspectives of practitioners on safety risk management processes of the Ghanaian oil and gas industry. The results of 219 respondents indicated that a disparity existed between the risk methods the practitioners were required to use by their companies and the risk management methods the practitioners preferred to use, and this was verified through statistical testing. Whereas the practitioners were required by their organisations to use quantitative methods, they preferred to use qualitative methods, indicating a difference between work as planned/imagined and work as done. It was further observed that risk management tools/techniques were mostly used proactively, with a limited reactive application during accident investigations. This suggests the limited/lack of integration of risk management into accident investigation processes. Furthermore, feedback from the respondents indicated the narrow use of bowtie analysis in the Ghanaian mining industry as over 60 % of the practitioners had received no training and could not use bowtie analysis. The practitioners’ responses generally showed that whereas current risk management processes in the Ghanaian oil and gas industry had some strengths, some weaknesses exist which offer improvement opportunities. These have been discussed throughout the paper.

Addressing risks to mental health from climate change: a policy capacity analysis of England

ABSTRACT Climate change and mental health are inextricably linked crises that demand urgent responses within the health sector and beyond. Mental health challenges associated with climate change are wide-ranging. They include depression, anxiety and post-traumatic stress resulting from increased exposure to extreme weather events, generalized climate anxiety and indirect impacts. However, there is a significant adaptation gap when it comes to addressing the mental health risks posed by climate change. Lack of capacity is frequently cited as a barrier to adaptation, yet ‘capacity’ covers many facets. This article examines the capacities of policy systems to design and implement adaptation initiatives for addressing the increasing risks to mental health posed by climate change. Focusing on England (UK) as an illustrative case study, this article deploys a policy capacity framework and draws on semi-structured interviews and policy document analysis. It identifies the ways that analytical, operational and political policy (in)capacities manifest across relevant policy areas, which include health, flood and coastal erosion risk management, spatial planning, natural environment and emergency management. Our analysis reveals that despite some strengths in analytical and political capacity, strained operational capacity is exacerbating and reinforcing adaptation gaps. We also demonstrate some of the complex interactions between different types of capacities that both enable and hamper adaptation. This article demonstrates the value of analysing policy capacity, and its potential in identifying and designing the necessary interventions to help circumvent a growing mental health crisis under climate change. Key policy insights In England, efforts to adapt to risks to mental health under climate change are supported through strong analytical capacity, involving research and knowledge generation, education and training, particularly in the mental health sector and Flood and Coastal Erosion Risk Management (FCERM). There is, however, room for improvement. Relatively strong political capacity, including advocacy and the role of policy champions, have led to increasing legitimation of the issue and fostered a growing policy landscape. However, some discernible gaps remain. There are significant weaknesses in operational capacity, restricting coordinated, preventative adaptation. This is partly due to significant resource constraints, and historic and current fragmentation within and between the health sector and others.

Risk Rationalities in Welfare State Policy and Practice in Indonesia: A Phenomenological Study of National Health Insurance in a Rural Community

The body of research examining the welfare systems of the Global South has expanded, yet there remains a lack of knowledge regarding the implications of modernising the welfare system in rural agrarian societies. A research gap in this area led us to conduct a live-in observation and 17 interviews with peasants in Merjosuro village—a rural area in Central Java, Indonesia—to examine how farmers’ rationality affects the perception of social risks and the decision-making process regarding health risks management. The study has two key findings. The first finding reveals that differences in the rationality of risk between policymakers and the Merjosuro community are the reason why the community does not participate in the National Health Insurance (JKN). The second finding indicates that the monthly contributory system promoted by JKN is incompatible with the livelihoods in an agrarian society characterised by unstable and irregular income depending on harvest time. Overall, the case in Merjosuro highlights the understudied phenomena of expanding modern-formal social policies within more traditional community-based informal welfare arrangements, which were found to have limited the pace of transformation of the welfare state expansion in the examined case. Additionally, the study has practical implications for rethinking contextualised designs of welfare state policies and practices for the Global South.

Blood Lead Levels in the Population Living in Algeria: A Cross-Sectional National Study.

Lead poisoning, is currently recognized as a real public health problem, The WHO classifies lead as one of 10 chemicals of serious public health concern. In Algeria and North Africa, to date, no study on the evaluation of lead impregnation has been carried out at the national level. The main objective of this work is to assess the exposure of the general Algerian population to lead. A cross-sectional study was carried out over the entire Algerian national territory, on a population aged between 3 and 74years old. The survey lasted three years, A questionnaire, a clinical examination and a blood sample were carried out for each individual. Generalized linear regression models were used to determine the factors influencing lead levels measured in blood samples. The study population, spread over 39 wilayas and 121 districts, consists of 3674 individuals. The mean lead levels were 28.27μg/L, the median was 22.22μg/L, and the 95th percentile was 73.83μg/L, Blood lead levels were influenced differently by age, gender, wilaya of residence, dietary habits such as consumption of canned food and the way in which water is conserved for daily consumption. The use of kohl has been confirmed as a potential source of lead exposure. In Algeria, a blood lead value of 75µg/L serves as the Reference Exposure Value, guiding public health responses and risk management strategies, Recommendations have been issued to reduce the blood lead levels of the general population in Algeria in terms of limitation of lead in the sources of exposure, installation of an effective health monitoring system.

Pathological and pharmacovigilance monitoring as toxicological imputations of azithromycin and its residues in broilers.

The importance of monitoring antimicrobial residues in food is underlined by increasing worries about food safety and public health. The potential toxicity of azithromycin (Az) on broilers and its impact on chicken meat residues require further investigation. This study assesses Az's toxicity effects and associated risks in broiler chickens through evaluation. One hundred and twenty chicks were distributed into four equal groups randomly. Each group received different daily oral doses of Az: 200 mg/kg for Az1, 100 mg/kg for Az2, and 50 mg/kg for Az3. The FAz group was given plain water. High-performance liquid chromatography was used to measure Az residue levels in muscle and liver. Oxidative markers (malondialdehyde [MDA], superoxide dismutase [SOD], catalase [CAT]), liver and kidney function tests, and histopathological examination were conducted. The levels of alanine aminotransferase and aspartate aminotransferase increased in Az1 and Az2 groups from 8 h to 3 days and decreased slightly in Az2 by 7 days, while they remained normal in Az3. The levels of uric acid and creatine in the Az1 and Az2 groups increased from 8 h to 3 days and subsequently decreased in Az2 by the 7th day. Az1 group showed the highest increase in MDA levels within 7 days. With higher Az doses, SOD and CAT levels showed a more significant decrease post-treatment. 9.1 μg/kg Az1 liver had the highest residues, whereas none were detected in muscle. At higher doses, Az caused significant liver and kidney damage, whereas lower doses had negligible effects. Muscle tissue contains fewer Az residues than liver. Assessing risks and ensuring compliance with regulations necessitate constant surveillance of Az residues in food. The health implications and risk management insights necessitate further investigation into the long-term effects of Az residues.

Региональные аспекты оценки результативности и эффективности риск-ориентированной модели контрольно-надзорной деятельности в сфере обеспечения санитарно-эпидемиологического благополучия населения

This research is relevant since it is important to assess performance and effectiveness of activities performed by Rospotrebnadzor bodies and organizations in RF regions. The aim of this study was to assess performance and effectiveness of control and surveillance activities performed by a territorial office of Rospotrebnadzor given the current reduction in scheduled inspections. Control and surveillance activities performed by the Rospotrebnadzor Rostov Regional Office in 2023 were selected as the research object. They were aimed at improving the quality of the environment for the region population and indirectly at reducing population incidence and mortality associated with exposures to harmful risk factors represented by ambient air, water, and soil pollution etc. The study was accomplished relying on methodical instruments developed by the Federal Scientific Center for Medical and Preventive Health Risk Management Technologies and approved by the RF Chief Sanitary Inspector. The basic methodology establishes rules for calculating economic losses associated with population mortality and incidence (children, working age population and population older than working age) caused by environmental exposures. Calculations were based on the results of instrumental measurements of the environment quality in cities in the Rostov region and the results of scheduled and off-schedule control activities performed by the Rospotrebnadzor Rostov Regional Office in 2023. It was established that control and surveillance activities performed by the Service managed to prevent approximately 1760 deaths and more than 152.4 thousand diseases, which could actually occur should the Service fail to perform its regulatory actions. The total prevented economic losses equaled approximately 2.1 billion rubles in 2023. Economic effectiveness was established relying on prevented losses of the gross regional product and equaled 7.25 rubles per 1 spent ruble in 2023 prices. There are several promising trends in the scientific and methodical support provided by practical activities performed by Rospotrebnadzor. They include development and implementation of methodical approaches to assessing effectiveness of prevention activities; searching for new approaches to assessing performance and effectiveness of other activities accomplished by the Service (licensing, registration of new and hazardous chemicals and products, etc.).

Regional aspects in assessment of performance and effectiveness of the risk-based model for control and surveillance activities in provision of sanitary-epidemiological wellbeing of the population

This research is relevant since it is important to assess performance and effectiveness of activities performed by Rospotrebnadzor bodies and organizations in RF regions. The aim of this study was to assess performance and effectiveness of control and surveillance activities performed by a territorial office of Rospotrebnadzor given the current reduction in scheduled inspections. Control and surveillance activities performed by the Rospotrebnadzor Rostov Regional Office in 2023 were selected as the research object. They were aimed at improving the quality of the environment for the region population and indirectly at reducing population incidence and mortality associated with exposures to harmful risk factors represented by ambient air, water, and soil pollution etc. The study was accomplished relying on methodical instruments developed by the Federal Scientific Center for Medical and Preventive Health Risk Management Technologies and approved by the RF Chief Sanitary Inspector. The basic methodology establishes rules for calculating economic losses associated with population mortality and incidence (children, working age population and population older than working age) caused by environmental exposures. Calculations were based on the results of instrumental measurements of the environment quality in cities in the Rostov region and the results of scheduled and off-schedule control activities performed by the Rospotrebnadzor Rostov Regional Office in 2023. It was established that control and surveillance activities performed by the Service managed to prevent approximately 1760 deaths and more than 152.4 thousand diseases, which could actually occur should the Service fail to perform its regulatory actions. The total prevented economic losses equaled approximately 2.1 billion rubles in 2023. Economic effectiveness was established relying on prevented losses of the gross regional product and equaled 7.25 rubles per 1 spent ruble in 2023 prices. There are several promising trends in the scientific and methodical support provided by practical activities performed by Rospotrebnadzor. They include development and implementation of methodical approaches to assessing effectiveness of prevention activities; searching for new approaches to assessing performance and effectiveness of other activities accomplished by the Service (licensing, registration of new and hazardous chemicals and products, etc.).

Exploring the continuing effects of COVID-19 on tertiary screen production education in Australia

ABSTRACT This article considers how the COVID-19 pandemic impacted tertiary-level screen production education in Australia. Six university educators across four Australian states present a series of critical thematic reflections, interrogating their lived experiences of teaching screen production courses during periods impacted by COVID-19 lockdowns and social distancing requirements. The analysis reveals the pandemic amplified areas like concept development and fundamental production skills using mobile devices, while more advanced technical skills and student collaboration suffered due to remote learning conditions. Managing health risks through COVID-safe protocols became a major priority. Student storytelling shifted towards shorter individual projects exploring themes of isolation, though some collectives producing anthology series also emerged. While some pandemic-driven changes like online meetings have persisted, the authors identify an ongoing need to foster students’ interpersonal skills and technical proficiency developed through collaborative, hands-on learning experiences. The diverse reflections highlight common challenges but also differences across states based on varying COVID-19 conditions and restrictions. Overall, the authors argue for balanced, responsive approaches going forward to equip graduates with frameworks to navigate screen industry shifts alongside changing student expectations around delivery modes.

Artificial Intelligence in Occupational Health and Safety Risk Management of Construction, Mining, and Oil and Gas Sectors: Advances and Prospects

Artificial Intelligence in Occupational Health and Safety Risk Management of Construction, Mining, and Oil and Gas Sectors: Advances and Prospects

Kegiatan Pengukuran Antropometri Pada Populasi Lanjut Usia Sebagai Deteksi Dini Obesitas Dan Komplikasi Terkait Obesitas

Obesity, characterized by excessive accumulation of body fat, increases susceptibility to chronic disease and adversely impacts overall quality of life. Elderly people often exhibit higher fat mass and lower muscle mass and bone density, influenced by reduced physical activity, hormonal changes, and metabolic adjustments. Visceral fat accumulation is of particular concern because of its association with metabolic syndrome, insulin resistance, diabetes, hypertension, and cardiovascular disease. This activity uses the PDCA (Plan-Do-Check-Act) framework to screen for obesity in the elderly using Body Mass Index (BMI) and waist circumference measurements. Activities were held at St. Fransiskus Assisi, Jakarta involving 36 participants. The study revealed that 16 participants (44.5%) and 30 people (83.3%) were obese and centrally obese, respectively. Early detection and intervention through anthropometric measurements are very important in managing health risks related to obesity in the elderly, so as to improve their quality of life and reduce morbidity and mortality.

Covid-19 and Well-Being of Tertiary Students in One State University: Basis for Social Counseling Program

Researchers explores the manifestation of students in covid-19 impact to their well-being and its significant relationship. The results served as the foundation for the Social Counseling Program. This study utilized descriptive research design and used validated survey type questionnaire. The non-random sample approach of respondents which was composed of 882 students of one State University having various campuses. The results showed that the covid-19 impact in terms of health risk, health protocols, and online learning management is strongly manifested in the lives of the students. Meanwhile, the well-being in terms of positive emotions, engagement, relationship, meaning and achievement (PERMA) is also manifested. Consequently, the study found a substantial association between the covid-19 influence and the Seligman Theory of well-being. Meanwhile, health procedures have a strong association with tertiary students' well-being, albeit with a limited degree of correlation. With this, it is recommended to evaluate the university's guidance and counseling services and interventions for students in the new normal contexts. Create appropriate interventions that will address learners' difficulties and worries about academic obstacles and overall life demands, particularly at a time of pandemic.

The risk of contact between visitors and Borrelia burgdorferi-infected ticks is associated with fine-scale landscape features in a southeastern Canadian nature park

BackgroundInfectious diseases are emerging across temperate regions of the world, and, for some, links have been made between landscapes and emergence dynamics. For tick-borne diseases, public parks may be important exposure sites for people living in urbanized areas of North America and Europe. In most cases, we know more about the ecological processes that determine the hazard posed by ticks as disease vectors than we do about how human population exposure varies in urban natural parks.MethodsIn this study, infrared counters were used to monitor visitor use of a public natural park in southern Quebec, Canada. A risk index representing the probability of encounters between humans and infected vectors was constructed. This was done by combining the intensity of visitor trail use and the density of infected nymphs obtained from field surveillance. Patterns of risk were examined using spatial cluster analysis. Digital forest data and park infrastructure data were then integrated using spatially explicit models to test whether encounter risk levels and its components vary with forest fragmentation indicators and proximity to park infrastructure.ResultsResults suggest that, even at a very fine scales, certain landscape features and infrastructure can be predictors of risk levels. Both visitors and Borrelia burgdorferi-infected ticks concentrated in areas where forest cover was dominant, so there was a positive association between forest cover and the risk index. However, there were no associations between indicators of forest fragmentation and risk levels. Some high-risk clusters contributed disproportionately to the risk distribution in the park relative to their size. There were also two high-risk periods, one in early summer coinciding with peak nymphal activity, and one in early fall when park visitation was highest.ConclusionsHere, we demonstrate the importance of integrating indicators of human behaviour visitation with tick distribution data to characterize risk patterns for tick-borne diseases in public natural areas. Indeed, understanding the environmental determinants of human-tick interactions will allow organisations to deploy more effective risk reduction interventions targeted at key locations and times, and improve the management of public health risks associated with tick-borne diseases in public spaces.

Simulating microplastics path in human airways

Simulating microplastics traveling through human airways will help inform targeting treatments, management of health risks, and raise awareness about the potential dangers.

Long-Term Co-Circulation of Host-Specialist and Host-Generalist Lineages of Group B Streptococcus in Brazilian Dairy Cattle with Heterogeneous Antimicrobial Resistance Profiles.

Group B Streptococcus (GBS) is a major cause of contagious bovine mastitis (CBM) in Brazil. The GBS population is composed of host-generalist and host-specialist lineages, which may differ in antimicrobial resistance (AMR) and zoonotic potential, and the surveillance of bovine GBS is crucial to developing effective CBM control and prevention measures. Here, we investigated bovine GBS isolates (n = 156) collected in Brazil between 1987 and 2021 using phenotypic testing and whole-genome sequencing to uncover the molecular epidemiology of bovine GBS. Clonal complex (CC) 61/67 was the predominant clade in the 20th century; however, it was replaced by CC91, with which it shares a most common recent ancestor, in the 21st century, despite the higher prevalence of AMR in CC61/67 than in CC91, and high selection pressure for AMR from indiscriminate antimicrobial use in the Brazilian dairy industry. CC103 also emerged as a dominant CC in the 21st century, and a considerable proportion of herds had two or more GBS strains, suggesting poor biosecurity and within-herd evolution due to the chronic nature of CBM problems. The majority of bovine GBS belonged to serotype Ia or III, which was strongly correlated with CCs. Ninety-three isolates were resistant to tetracycline (≥8 μg/mL; tetO = 57, tetM = 34 or both = 2) and forty-four were resistant to erythromycin (2.0 to >4 μg/mL; ermA = 1, ermB = 38, mechanism unidentified n = 5). Only three isolates were non-susceptible to penicillin (≥8.0 μg/mL), providing opportunities for improved antimicrobial stewardship through the use of narrow-spectrum antimicrobials for the treatment of dairy cattle. The common bovine GBS clades detected in this study have rarely been reported in humans, suggesting limited risk of interspecies transmission of GBS in Brazil. This study provides new data to support improvements to CBM and AMR control, bovine GBS vaccine design, and the management of public health risks posed by bovine GBS in Brazil.