scholarly journals ‘Pollen potency’: the relationship between atmospheric pollen counts and allergen exposure

Aerobiologia ◽  
2021 ◽  
Author(s):  
Lachlan J. Tegart ◽  
Fay H. Johnston ◽  
Nicolas Borchers Arriagada ◽  
Annabelle Workman ◽  
Joanne L. Dickinson ◽  
...  
Keyword(s):  
Public Health ◽  
Evidence Base ◽  
Global Public Health ◽  
Pollen Monitoring ◽  
Pollen Counts ◽  
Public Health Burden ◽  
Specific Proteins ◽  
Atmospheric Pollen ◽  
The Relationship ◽  
Monitoring Practice

AbstractPollen allergies are responsible for a considerable global public health burden, and understanding exposure is critical to addressing the health impacts. Atmospheric pollen counts are routinely used as a predictor of risk; however, immune responses are triggered by specific proteins known as allergens, which occur both within and on the surface of the pollen grain. The ratio between atmospheric pollen counts and allergen concentrations (‘pollen potency’) has been shown to be inconsistent, with potentially important implications for pollen monitoring practice. Despite this, there has been no previous synthesis of the literature and our understanding of the factors that influence pollen potency remains poor. We conducted a scoping review with the aim of deriving a current understanding of: (a) the factors that influence pollen potency; (b) its variation through time, between taxa and by location; and (c) the implications for pollen monitoring practice. Our synthesis found that pollen potency is highly variable within and between seasons, and between locations; however, much of this variability remains unexplained and has not been deeply investigated. We found no predictable pollen potency patterns relating to taxon, geography or time, and inconclusive evidence regarding possible driving factors. With respect to human health, the studies in our synthesis generally reported larger associations between atmospheric allergen loads and allergy symptoms than whole pollen counts. This suggests that pollen potency influences public health risk; however, the evidence base remains limited. Further research is needed to better understand both pollen potency variability and its implications for health.

scholarly journals Linking rattiness, geography and environmental degradation to spillover Leptospira infections in marginalised urban settings: an eco-epidemiological community-based cohort study in Brazil

2021 ◽  
Author(s):  
Max T Eyre ◽  
Fábio N Souza ◽  
Ticiana S. A. Carvalho-Pereira ◽  
Nivison Nery ◽  
Daiana de Oliveira ◽  
...  
Keyword(s):  
Public Health ◽  
Public Health Intervention ◽  
Spatial Modelling ◽  
The United States ◽  
Infection Risk ◽  
Human Infection ◽  
Global Public Health ◽  
Entire Study ◽  
Urban Settings ◽  
Public Health Burden

Background: Zoonotic spillover from animal reservoirs is responsible for a significant global public health burden, but the processes that promote spillover events are poorly understood in complex urban settings. Endemic transmission of Leptospira, the agent of leptospirosis, in marginalised urban communities occurs through human exposure to an environment contaminated by bacteria shed in the urine of the rat reservoir. However, it is unclear to what extent transmission is driven by variation in the distribution of rats or by the dispersal of bacteria in rainwater runoff and overflow from open sewer systems. <br /><br />Methods: We conducted an eco-epidemiological study in a high-risk community in Salvador, Brazil, by prospectively following a cohort of 1,401 residents to ascertain serological evidence for leptospiral infections. A concurrent rat ecology study was used to collect information on the fine-scale spatial distribution of ‘rattiness’, our proxy for rat abundance and exposure of interest. We developed and applied a novel geostatistical framework for joint spatial modelling of multiple indices of disease reservoir abundance and human infection risk. <br /><br />Results: The estimated infection rate was 51.4 (95\%CI 40.4, 64.2) infections per 1,000 follow-up events. Infection risk increased with age until 30 years of age and was associated with male gender. Rattiness was positively associated with infection risk for residents across the entire study area, but this effect was stronger in higher elevation areas (OR 3.27 95\%CI 1.68, 19.07) than in lower elevation areas (OR 1.14 95\%CI 1.05, 1.53). <br /><br />Conclusions: These findings suggest that, while frequent flooding events may disperse bacteria in regions of low elevation, environmental risk in higher elevation areas is more localised and directly driven by the distribution of local rat populations. The modelling framework developed may have broad applications in delineating complex animal-environment-human interactions during zoonotic spillover and identifying opportunities for public health intervention.<br /><br />Funding: This work was supported by the Oswaldo Cruz Foundation and Secretariat of Health Surveillance, Brazilian Ministry of Health, the National Institutes of Health of the United States (grant numbers F31 AI114245, R01 AI052473, U01 AI088752, R01 TW009504 and R25 TW009338); the Wellcome Trust (102330/Z/13/Z), and by the Fundação de Amparo à Pesquisa do Estado da Bahia (FAPESB/JCB0020/2016). M.T.E is supported by an MRC doctorate studentship. F.N.S. participated in this study under a FAPESB doctorate scholarship.

scholarly journals Emerging Antimicrobial-Resistant High-Risk Klebsiella pneumoniae Clones ST307 and ST147

2020 ◽  
Vol 64 (10) ◽  
Author(s):  
Gisele Peirano ◽  
Liang Chen ◽  
Barry N. Kreiswirth ◽  
Johann D. D. Pitout
Keyword(s):  
Public Health ◽  
High Risk ◽  
Klebsiella Pneumoniae ◽  
The United States ◽  
Medical Community ◽  
Global Public Health ◽  
African Countries ◽  
Content Type ◽  
Public Health Burden ◽  
Worldwide Distribution

ABSTRACT There is an enormous global public health burden due to antimicrobial-resistant (AMR) Klebsiella pneumoniae high-risk clones. K. pneumoniae ST307 and ST147 are recent additions to the family of successful clones in the species. Both clones likely emerged in Europe during the early to mid-1990s and, in a relatively short time, became prominent global pathogens, spreading to all continents (with the exception of Antarctica). ST307 and ST147 consist of multiple clades/clusters and are associated with various carbapenemases (i.e., KPCs, NDMs, OXA-48-like, and VIMs). ST307 is endemic in Italy, Colombia, the United States (Texas), and South Africa, while ST147 is endemic in India, Italy, Greece, and certain North African countries. Both clones have been introduced into regions of nonendemicity, leading to worldwide nosocomial outbreaks. Genomic studies showed ST307 and ST147 contain identical gyrA and parC mutations and likely obtained plasmids with blaCTX-M-15 during the early to mid-2000s, which aided in their global distribution. ST307 and ST147 then acquired plasmids with various carbapenemases during the late 2000s, establishing themselves as important AMR pathogens in certain regions. Both clones are likely underreported due to restricted detection methodologies. ST307 and ST147 have the ability to become major threats to public health due to their worldwide distribution, ability to cause serious infections, and association with AMR, including panresistance. The medical community at large, especially those concerned with antimicrobial resistance, should be aware of the looming threat posed by emerging AMR high-risk clones such as K. pneumoniae ST307 and ST147.

scholarly journals Mesenchymal Stem Cells and Tuberculosis: Clinical Challenges and Opportunities

2021 ◽  
Vol 12 ◽  
Author(s):  
Xueying Zhang ◽  
Qi Xie ◽  
Ziyu Ye ◽  
Yanyun Li ◽  
Zhengping Che ◽  
...  
Keyword(s):  
Public Health ◽  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Public Health Problem ◽  
Global Public Health ◽  
Growth Status ◽  
Challenges And Opportunities ◽  
Immunomodulatory Properties ◽  
The Relationship ◽  
Global Public Health Problem

Tuberculosis (TB) is one of the communicable diseases caused by Mycobacterium tuberculosis (Mtb) infection, affecting nearly one-third of the world’s population. However, because the pathogenesis of TB is still not fully understood and the development of anti-TB drug is slow, TB remains a global public health problem. In recent years, with the gradual discovery and confirmation of the immunomodulatory properties of mesenchymal stem cells (MSCs), more and more studies, including our team’s research, have shown that MSCs seem to be closely related to the growth status of Mtb and the occurrence and development of TB, which is expected to bring new hope for the clinical treatment of TB. This article reviews the relationship between MSCs and the occurrence and development of TB and the potential application of MSCs in the treatment of TB.

scholarly journals A Public Health Approach to Global Child Sex Trafficking

2020 ◽  
Vol 41 (1) ◽  
pp. 481-497 ◽  
Author(s):  
Jordan Greenbaum
Keyword(s):  
Public Health ◽  
Human Trafficking ◽  
Sex Trafficking ◽  
Scientific Evidence ◽  
Sexual Exploitation ◽  
Evidence Base ◽  
Public Health Approach ◽  
Global Public Health ◽  
Public Health Professionals ◽  
Child Sex Trafficking

Human trafficking and child sex trafficking and sexual exploitation in particular are global public health issues with widespread, lasting impacts on children, families, and communities. Traditionally, human trafficking has been treated as a law enforcement problem with an emphasis on the arrest and prosecution of traffickers. However, use of a public health approach focuses efforts on those impacted by exploitation: trafficked persons, their families, and the population at large. It promotes strategies to build a solid scientific evidence base that allows development, implementation, and evaluation of prevention and intervention efforts, informs policy and program development, and guides international efforts at eradication. This article uses the public health approach to address human trafficking, with a focus on child sex trafficking and exploitation. Recommendations are made for public health professionals to contribute to antitrafficking efforts globally.

Neuroimaging and fluid biomarkers of Alzheimer’s disease

2020 ◽  
pp. 9-20
Author(s):  
Vijay R Varma ◽  
Yi-Fang Chuang ◽  
Madhav Thambisetty
Keyword(s):  
Public Health ◽  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Clinical Trials ◽  
Cerebrospinal Fluid ◽  
Cognitive Impairment ◽  
Evidence Base ◽  
Clinical Settings ◽  
Global Public Health ◽  
Public Health Challenges

Neuroimaging and fluid biomarkers have revolutionized the way we define Alzheimer’s disease (AD), identify at-risk individuals, diagnose those with symptoms, and may eventually enable us to treat patients in the earliest stages of the disease. We review advances in imaging the principal pathological hallmarks and functional perturbations in the AD brain and map progress in identifying cerebrospinal fluid and blood biomarkers of AD. Together, these modalities have provided invaluable insights into the evolution of AD decades before the onset of cognitive impairment. While they have been rapidly adopted into clinical settings, the evidence base for this remains contested. However, the clear value of neuroimaging and fluid biomarkers is in their relevance to clinical trials and the recruitment of individuals who perceive themselves to be at sufficiently high risk to warrant joining research studies testing experimental AD treatments. This marks a paradigm shift in our efforts to overcome one of the global public health challenges of our time.

scholarly journals The evolving burden of asthma and contemporary advances in management: Implications for clinical practice in Southern Africa

2020 ◽  
Vol 8 (3) ◽  
pp. 059-070
Author(s):  
Andrew Kiboneka
Keyword(s):  
Public Health ◽  
Severe Asthma ◽  
World Health ◽  
Response To Treatment ◽  
Health Concern ◽  
Common Disease ◽  
Global Public Health ◽  
Disease Heterogeneity ◽  
Public Health Burden ◽  
The World

Asthma is a rising significant global public health burden especially in the developing countries. The annual prevalence of severe asthma episodes is estimated from 1% to 21% for adults and over 20% for children aged 6–7 years. The prevalence of asthma varies widely around the world, ranging from 0.2% to 21.0% in adults and from 2.8% to 37.6% in 6- to 7-year-old children. The International Study of Asthma and Allergies in Children (ISAAC) reports a significant increase in the global prevalence of asthmatic episodes among children. t was estimated that more than 339 million people had Asthma globally in 2016. It is a common disease among children. The common disease asthma is probably not a single disease, but rather a complex of multiple, separate syndromes that overlap. Most asthma-related deaths occur in low- and lower-middle income countries. According to the World Health Organization (WHO) estimates, there were 417,918 deaths due to asthma at the global level and 24.8 million DALYS attributable to Asthma in in 2016. The WHO has estimated that the economic costs associated with asthma have exceeded those of TB and HIV/AIDS combined, and the Global Initiative for Asthma Program forecasted the number of asthma patients to grow globally to greater than 400 million by the year 2025. Since its first description by Hippocrates, asthma remains a treatable yet incurable disease. It is now clear that asthma is a complex syndrome with variable severity, natural history and response to treatment In Namibia a prevalence of Asthma of 11.2 % has been reported in adult populations. The increase in asthmatic episodes, morbidity and mortality among populations in Africa, Latin America and parts of Asia is a rising public health concern. The development of novel asthma phenotyping & endo typing plus better classification of patients using machine learning and big data have markedly improved asthma treatment outcomes in both children and Adults. Several research groups have developed cluster analyses of phenotypes in severe asthma. These clusters support the importance of disease heterogeneity in asthma and suggest differences in pathophysiologic mechanisms that define these clusters. Precision medicine is "an emerging approach for disease treatment and prevention that takes into account individual variability in genes, environment, and lifestyle for each person.

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