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Spatial epidemiology

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https://www.readbyqxmd.com/read/28427451/household-level-spatio-temporal-analysis-of-plasmodium-falciparum-and-plasmodium-vivax-malaria-in-ethiopia
#1
Dinberu Seyoum, Delenasaw Yewhalaw, Luc Duchateau, Patrick Brandt, Angel Rosas-Aguirre, Niko Speybroeck
BACKGROUND: The global decline of malaria burden and goals for elimination has led to an increased interest in the fine-scale epidemiology of malaria. Micro-geographic heterogeneity of malaria infection could have implications for designing targeted small-area interventions. METHODS: Two-year longitudinal cohort study data were used to explore the spatial and spatio-temporal distribution of malaria episodes in 2040 children aged < 10 years in 16 villages near the Gilgel-Gibe hydropower dam in Southwest Ethiopia...
April 20, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28427355/identifying-and-characterizing-hepatitis-c-virus-hotspots-in-massachusetts-a-spatial-epidemiological-approach
#2
Thomas J Stopka, Michael A Goulart, David J Meyers, Marga Hutcheson, Kerri Barton, Shauna Onofrey, Daniel Church, Ashley Donahue, Kenneth K H Chui
BACKGROUND: Hepatitis C virus (HCV) infections have increased during the past decade but little is known about geographic clustering patterns. METHODS: We used a unique analytical approach, combining geographic information systems (GIS), spatial epidemiology, and statistical modeling to identify and characterize HCV hotspots, statistically significant clusters of census tracts with elevated HCV counts and rates. We compiled sociodemographic and HCV surveillance data (n = 99,780 cases) for Massachusetts census tracts (n = 1464) from 2002 to 2013...
April 20, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28425424/spatial-distribution-of-batrachochytrium-dendrobatidis-in-south-american-caecilians
#3
Carolina Lambertini, C Guilherme Becker, Cecilia Bardier, Domingos da Silva Leite, Luís Felipe Toledo
The amphibian-killing fungus Batrachochytrium dendrobatidis (Bd) is linked to population declines in anurans and salamanders globally. To date, however, few studies have attempted to screen Bd in live caecilians; Bd-positive caecilians have only been reported in Africa and French Guiana. Here, we performed a retrospective survey of museum preserved specimens to (1) describe spatial patterns of Bd infection in Gymnophiona across South America and (2) test whether areas of low climatic suitability for Bd in anurans predict Bd spatial epidemiology in caecilians...
April 20, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28422922/the-spatial-epidemiology-of-pediatric-trauma-a-statewide-assessment
#4
Allison Ertl, Kirsten Beyer, Sergey Tarima, Yuhong Zhou, Jonathan I Groner, Laura D Cassidy
INTRODUCTION: Despite significant advances in the prevention and treatment of pediatric trauma, preventable injuries continue to burden the lives of millions of children. In order to target prevention strategies, it is critical to identify areas with high burdens of pediatric trauma. Therefore, this study analyzed statewide data from the Ohio Trauma Registry (OTR) from 2007-2012 to identify geographical patterns in pediatric injury. METHODS: Data from the first hospital of care for 16,330 pediatric trauma patients under 16 years old were analyzed using the disease mapping method adaptive spatial filtering to estimate a series of maps that display age- and sex-adjusted rates of pediatric trauma, severe trauma, and standardized mortality ratios (SMR) while controlling for population size to create stable estimates throughout the study area...
April 18, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28422905/distance-matters-effect-of-geographic-trauma-system-resource-organization-on-fatal-motor-vehicle-collisions
#5
Joshua B Brown, Matthew R Rosengart, Timothy R Billiar, Andrew B Peitzman, Jason L Sperry
BACKGROUND: Trauma systems improve outcome; however, it is unclear how geographic organization of trauma system resources (TSR) affects outcome. Our objective was to evaluate the relationship of fatal motor vehicle collisions (MVC) rates and the distance from individual MVC locations to the nearest TSR as a measure of the geographical organization of trauma systems, as well as how theoretical changes in the distribution of TSR may affect fatal MVC rates. METHODS: All fatal MVC in Pennsylvania 2013-14 were mapped from the FARS database...
April 18, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28420160/global-transmission-dynamics-of-measles-in-the-measles-elimination-era
#6
Yuki Furuse, Hitoshi Oshitani
Although there have been many epidemiological reports of the inter-country transmission of measles, systematic analysis of the global transmission dynamics of the measles virus (MV) is limited. In this study, we applied phylogeographic analysis to characterize the global transmission dynamics of the MV using large-scale genetic sequence data (obtained for 7456 sequences) from 115 countries between 1954 and 2015. These analyses reveal the spatial and temporal characteristics of global transmission of the virus, especially in Australia, China, India, Japan, the UK, and the USA in the period since 1990...
April 16, 2017: Viruses
https://www.readbyqxmd.com/read/28411164/high-levels-of-local-inter-and-intra-host-genetic-variation-of-west-nile-virus-and-evidence-of-fine-scale-evolutionary-pressures
#7
Dylan J Ehrbar, Kiet A Ngo, Scott R Campbell, Laura D Kramer, Alexander T Ciota
West Nile virus (WNV; Flaviviridae, Flavivirus) has been endemic in New York State (NYS) since its 1999 introduction, yet prevalence in Culex mosquitoes varies substantially over small spatial and temporal scales. It is unclear if viral genetics plays a role in this variability, as genetic and phenotypic characterization on local scales has generally been lacking. In addition, intrahost diversity of circulating strains have not been fully characterized despite the documented role of minority variants in viral fitness and virulence...
April 12, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28408086/estimates-and-25-year-trends-of-the-global-burden-of-disease-attributable-to-ambient-air-pollution-an-analysis-of-data-from-the-global-burden-of-diseases-study-2015
#8
Aaron J Cohen, Michael Brauer, Richard Burnett, H Ross Anderson, Joseph Frostad, Kara Estep, Kalpana Balakrishnan, Bert Brunekreef, Lalit Dandona, Rakhi Dandona, Valery Feigin, Greg Freedman, Bryan Hubbell, Amelia Jobling, Haidong Kan, Luke Knibbs, Yang Liu, Randall Martin, Lidia Morawska, C Arden Pope, Hwashin Shin, Kurt Straif, Gavin Shaddick, Matthew Thomas, Rita van Dingenen, Aaron van Donkelaar, Theo Vos, Christopher J L Murray, Mohammad H Forouzanfar
BACKGROUND: Exposure to ambient air pollution increases morbidity and mortality, and is a leading contributor to global disease burden. We explored spatial and temporal trends in mortality and burden of disease attributable to ambient air pollution from 1990 to 2015 at global, regional, and country levels. METHODS: We estimated global population-weighted mean concentrations of particle mass with aerodynamic diameter less than 2·5 μm (PM2·5) and ozone at an approximate 11 km × 11 km resolution with satellite-based estimates, chemical transport models, and ground-level measurements...
April 10, 2017: Lancet
https://www.readbyqxmd.com/read/28405379/human-mobility-networks-and-persistence-of-rapidly-mutating-pathogens
#9
Alberto Aleta, Andreia N S Hisi, Sandro Meloni, Chiara Poletto, Vittoria Colizza, Yamir Moreno
Rapidly mutating pathogens may be able to persist in the population and reach an endemic equilibrium by escaping hosts' acquired immunity. For such diseases, multiple biological, environmental and population-level mechanisms determine the dynamics of the outbreak, including pathogen's epidemiological traits (e.g. transmissibility, infectious period and duration of immunity), seasonality, interaction with other circulating strains and hosts' mixing and spatial fragmentation. Here, we study a susceptible-infected-recovered-susceptible model on a metapopulation where individuals are distributed in sub-populations connected via a network of mobility flows...
March 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28405365/dynamics-of-host-populations-affected-by-the-emerging-fungal-pathogen-batrachochytrium-salamandrivorans
#10
Benedikt R Schmidt, Claudio Bozzuto, Stefan Lötters, Sebastian Steinfartz
Emerging infectious diseases cause extirpation of wildlife populations. We use an epidemiological model to explore the effects of a recently emerged disease caused by the salamander-killing chytrid fungus Batrachochytrium salamandrivorans (Bsal) on host populations, and to evaluate which mitigation measures are most likely to succeed. As individuals do not recover from Bsal, we used a model with the states susceptible, latent and infectious, and parametrized the model using data on host and pathogen taken from the literature and expert opinion...
March 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28403172/a-first-estimate-of-the-structure-and-density-of-the-populations-of-pet-cats-and-dogs-across-great-britain
#11
James Aegerter, David Fouracre, Graham C Smith
Policy development, implementation, and effective contingency response rely on a strong evidence base to ensure success and cost-effectiveness. Where this includes preventing the establishment or spread of zoonotic or veterinary diseases infecting companion cats and dogs, descriptions of the structure and density of the populations of these pets are useful. Similarly, such descriptions may help in supporting diverse fields of study such as; evidence-based veterinary practice, veterinary epidemiology, public health and ecology...
2017: PloS One
https://www.readbyqxmd.com/read/28399503/national-scale-exposure-prediction-for-long-term-concentrations-of-particulate-matter-and-nitrogen-dioxide-in-south-korea
#12
Sun-Young Kim, Insang Song
The limited spatial coverage of the air pollution data available from regulatory air quality monitoring networks hampers national-scale epidemiological studies of air pollution. The present study aimed to develop a national-scale exposure prediction model for estimating annual average concentrations of PM10 and NO2 at residences in South Korea using regulatory monitoring data for 2010. Using hourly measurements of PM10 and NO2 at 277 regulatory monitoring sites, we calculated the annual average concentrations at each site...
April 8, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28397866/epidemiological-characteristics-and-spatial-temporal-clusters-of-mumps-in-shandong-province-china-2005-2014
#13
Runzi Li, Shenghui Cheng, Cheng Luo, Shannon Rutherford, Jin Cao, Qinqin Xu, Xiaodong Liu, Yanxun Liu, Fuzhong Xue, Qing Xu, Xiujun Li
Mumps presents a serious threat to public health in China. We conducted a descriptive analysis to identify the epidemiological characteristics of mumps in Shandong Province. Spatial autocorrelation and space-time scan analyses were utilized to detect spatial-temporal clusters. From 2005 to 2014, 115745 mumps cases were reported in Shandong, with an average male-to-female ratio of 1.94. Mumps occurred mostly in spring (32.17% of all reported cases) and in children aged 5 to 9 (40.79% of all reported cases). The Moran's I test was significant and local indicators of spatial autocorrelation (LISA) analysis revealed significant spatial clusters with high incidence...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28395241/spatial-variations-in-ambient-ultrafine-particle-concentrations-and-the-risk-of-incident-prostate-cancer-a-case-control-study
#14
Scott Weichenthal, Eric Lavigne, Marie-France Valois, Marianne Hatzopoulou, Keith Van Ryswyk, Maryam Shekarrizfard, Paul J Villeneuve, Mark S Goldberg, Marie-Elise Parent
BACKGROUND: Diesel exhaust contains large numbers of ultrafine particles (UFPs, <0.1µm) and is a recognized human carcinogen. However, epidemiological studies have yet to evaluate the relationship between UFPs and cancer incidence. METHODS: We conducted a case-control study of UFPs and incident prostate cancer in Montreal, Canada. Cases were identified from all main Francophone hospitals in the Montreal area between 2005 and 2009. Population controls were identified from provincial electoral lists of French Montreal residents and frequency-matched to cases using 5-year age groups...
April 7, 2017: Environmental Research
https://www.readbyqxmd.com/read/28392444/spatiotemporal-spread-of-grapevine-red-blotch-associated-virus-in-a-california-vineyard
#15
Elizabeth J Cieniewicz, Sarah J Pethybridge, Adrienne Gorny, Laurence V Madden, Heather McLane, Keith L Perry, Marc Fuchs
Grapevine red blotch-associated virus (GRBaV), the causative agent of red blotch disease, is a member of the genus Grablovirus, in the family Geminiviridae and the first known geminivirus of Vitis spp. Limited information is available on the epidemiology of red blotch disease. A 2-hectare Vitis vinifera cv. 'Cabernet franc' vineyard in Napa County, California, USA was selected for monitoring GRBaV spread over a three-year period (2014-2016) based on an initially low disease incidence and an aggregation of symptomatic vines at the edge of the vineyard proximal to a wooded riparian area...
April 6, 2017: Virus Research
https://www.readbyqxmd.com/read/28388689/whole-genome-sequencing-of-brucella-melitensis-isolated-from-57-patients-in-germany-reveals-high-diversity-in-strains-from-middle-east
#16
Enrico Georgi, Mathias C Walter, Marie-Theres Pfalzgraf, Bernd H Northoff, Lesca M Holdt, Holger C Scholz, Lothar Zoeller, Sabine Zange, Markus H Antwerpen
Brucellosis, a worldwide common bacterial zoonotic disease, has become quite rare in Northern and Western Europe. However, since 2014 a significant increase of imported infections caused by Brucella (B.) melitensis has been noticed in Germany. Patients predominantly originated from Middle East including Turkey and Syria. These circumstances afforded an opportunity to gain insights into the population structure of Brucella strains. Brucella-isolates from 57 patients were recovered between January 2014 and June 2016 with culture confirmed brucellosis by the National Consultant Laboratory for Brucella...
2017: PloS One
https://www.readbyqxmd.com/read/28388681/mule-deer-spatial-association-patterns-and-potential-implications-for-transmission-of-an-epizootic-disease
#17
María Fernanda Mejía-Salazar, Anne W Goldizen, Clementine S Menz, Ross G Dwyer, Simon P Blomberg, Cheryl L Waldner, Catherine I Cullingham, Trent K Bollinger
Animal social behaviour can have important effects on the long-term dynamics of diseases. In particular, preferential spatial relationships between individuals can lead to differences in the rates of disease spread within a population. We examined the concurrent influence of genetic relatedness, sex, age, home range overlap, time of year, and prion disease status on proximal associations of adult Rocky Mountain mule deer (Odocoileus hemionus hemionus) in a chronic wasting disease endemic area. We also quantified the temporal stability of these associations across different sex, age, and disease status classes...
2017: PloS One
https://www.readbyqxmd.com/read/28387141/nationwide-incidence-of-motor-neuron-disease-using-the-french-health-insurance-information-system-database
#18
Sofiane Kab, Frédéric Moisan, Pierre-Marie Preux, Benoît Marin, Alexis Elbaz
OBJECTIVE: There are no estimates of the nationwide incidence of motor neuron disease (MND) in France. We used the French health insurance information system to identify incident MND cases (2012-2014), and compared incidence figures to those from three external sources. METHODS: We identified incident MND cases (2012-2014) based on three data sources (riluzole claims, hospitalisation records, long-term chronic disease benefits), and computed MND incidence by age, gender, and geographic region...
April 7, 2017: Amyotrophic Lateral Sclerosis and Frontotemporal Degeneration
https://www.readbyqxmd.com/read/28377748/evidence-for-contemporary-switching-of-the-o-antigen-gene-cluster-between-shiga-toxin-producing-escherichia-coli-strains-colonizing-cattle
#19
Lutz Geue, Christian Menge, Inga Eichhorn, Torsten Semmler, Lothar H Wieler, Derek Pickard, Christian Berens, Stefanie A Barth
Shiga toxin-producing Escherichia coli (STEC) comprise a group of zoonotic enteric pathogens with ruminants, especially cattle, as the main reservoir. O-antigens are instrumental for host colonization and bacterial niche adaptation. They are highly immunogenic and, therefore, targeted by the adaptive immune system. The O-antigen is one of the most diverse bacterial cell constituents and variation not only exists between different bacterial species, but also between individual isolates/strains within a single species...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28374825/natural-scales-in-geographical-patterns
#20
Telmo Menezes, Camille Roth
Human mobility is known to be distributed across several orders of magnitude of physical distances, which makes it generally difficult to endogenously find or define typical and meaningful scales. Relevant analyses, from movements to geographical partitions, seem to be relative to some ad-hoc scale, or no scale at all. Relying on geotagged data collected from photo-sharing social media, we apply community detection to movement networks constrained by increasing percentiles of the distance distribution. Using a simple parameter-free discontinuity detection algorithm, we discover clear phase transitions in the community partition space...
April 4, 2017: Scientific Reports
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