The front-wave velocity of African swine fever (ASF) virus spread is depicted through a retrospective spatial and temporal analyses of wild boar outbreaks from Jan. 2014 to Jan. 2022 in Estonia, Latvia, Lithuania and Eastern Poland-regions responsible for more than 50% of all wild boar cases in the EU. The study uses empirical semivariograms in a universal kriging model to assess spatial autocorrelation in notification dates and identifies a discernable large-scale spatial trend. The critical parameter of ASF front-wave velocity was identified (Mean = 66.33 km/month, SD = 163.24) in the whole study area, and explored the variations across countries, wild boar habitat suitability, seasons, and the study period. Statistical differences in front-wave velocity values among countries and temporal clusters are explored, shedding light on potential factors influencing ASF transmission dynamics. The implications of these findings for surveillance and control strategies are discussed.
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http://dx.doi.org/10.3389/fvets.2024.1353983 | DOI Listing |
Front Vet Sci
March 2024
Epidemiology and Environmental Health Group, Department of Infectious Animal Diseases and Global Health, Animal Health Research Centre, National Centre Institute for Agriculture and Food Research and Technology, Spanish National Research Council (CISA-INIA-CSIC), Madrid, Spain.
The front-wave velocity of African swine fever (ASF) virus spread is depicted through a retrospective spatial and temporal analyses of wild boar outbreaks from Jan. 2014 to Jan. 2022 in Estonia, Latvia, Lithuania and Eastern Poland-regions responsible for more than 50% of all wild boar cases in the EU.
View Article and Find Full Text PDFInt J Environ Res Public Health
September 2021
Centre de Recherche en Santé Publique, 7101 Av du Parc, Montréal, QC H3N 1X9, Canada.
Nat Commun
April 2018
Univ Lyon, INSA-Lyon, CNRS UMR5259, LaMCoS, Lyon, F-69621, France.
Single crystalline silicon fractures on low-energy cleavage planes such as (111) and (110). The crack propagation cannot accurately be predicted by linear elastic fracture mechanics since it does not account for small scale and inelastic phenomena such as atomic lattice trapping. Here we show that, under pure bending load, (110) cleavage in silicon single crystal rapidly accelerates to 3700 m/s without crack path deviation or crack branching, contrasting previous observations.
View Article and Find Full Text PDFBiophys J
August 2013
Department of Chemical Engineering, Institute of Chemical Technology, Prague, Czech Republic.
We study effects of oscillatory convective flow in extracellular space on the velocity of chemical signal propagation having a form of a front wave above a cellular layer. We found that the time-averaged propagation velocity under oscillatory flow for a particular Péclet number amplitude is slower than the velocity under steady laminar flow regime for the same value of the Péclet number, but significantly faster than under no-flow conditions. We derive asymptotic values of the propagation velocity and asymptotic characteristics of the corresponding concentration fronts in high- and low-frequency regimes and show that the reason for the observed velocity increase under the oscillatory flow stems from a nonlinear dependence of the propagation velocity on the Péclet number, particularly from the convex character of the dependence.
View Article and Find Full Text PDFBiophys J
March 2012
Department of Chemical Engineering, Institute of Chemical Technology, Prague, Czech Republic.
We study effects of convective transport on a chemical front wave representing a signal propagation at a simple (single layer) epithelium by means of mathematical modeling. Plug flow and laminar flow regimes were considered. We observed a nonmonotonous dependence of the propagation velocity on the ligand receptor binding constant under influence of the convective transport.
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