Simulation modelling to evaluate the effectiveness of control strategies during the 2010/11 foot-and-mouth disease (FMD) epidemic in the city of Andong, Republic of Korea

2018 ◽  
Vol 42 (3) ◽  
pp. 99-106 ◽  
Author(s):  
Eu-Tteum Kim ◽  
◽  
Son-Il Pak
Keyword(s):  
Control Strategies ◽  
Foot And Mouth Disease ◽  
Simulation Modelling ◽  
Mouth Disease ◽  
Republic Of Korea ◽  
Foot And Mouth ◽  
The City

scholarly journals Relative transmissibility of hand, foot and mouth disease from male to female individuals

2019 ◽  
Vol 147 ◽  
Author(s):  
Yuxue Liao ◽  
Yaqing He ◽  
Yan Lu ◽  
Hong Yang ◽  
Yanhua Su ◽  
...  
Keyword(s):  
Relative Rate ◽  
Foot And Mouth Disease ◽  
Mouth Disease ◽  
Male And Female ◽  
Shenzhen City ◽  
Foot And Mouth ◽  
The Difference ◽  
The City ◽  
Death Cases ◽  
Male To Female

Abstract Hand, foot and mouth disease (HFMD) has spread widely and leads to high disease burden in many countries. However, relative transmissibility from male to female individuals remains unclear. HFMD surveillance database was built in Shenzhen City from 2013 to 2017. An intersex transmission susceptible–infectious–recovered model was developed to calculate the transmission relative rate among male individuals, among female individuals, from male to female and from female to male. Two indicators, ratio of transmission relative rate (R β ) and relative transmissibility index (RTI), were developed to assess the relative transmissibility of male vs. female. During the study period, 270 347 HFMD cases were reported in the city, among which 16 were death cases with a fatality of 0.0059%. Reported incidence of total cases, male cases and female cases was 0.0057 (range: 0.0036–0.0058), 0.0052 (range: 0.0032–0.0053) and 0.0044 (range: 0.0026–0.0047), respectively. The difference was statistically significant between male and female (t = 3.046, P = 0.002). R β of male vs. female, female vs. female, from female to male vs. female and from male to female vs. female was 7.69, 1.00, 1.74 and 7.13, respectively. RTI of male vs. female, female vs. female, from female to male vs. female and from male to female vs. female was 3.08, 1.00, 1.88 and 1.43, respectively. Transmissibility of HFMD is different between male and female individuals. Male cases seem to be more transmissible than female.

scholarly journals Innate Immune Defenses Induced by CpG Do Not Promote Vaccine-Induced Protection against Foot-and-Mouth Disease Virus in Pigs

2009 ◽  
Vol 16 (8) ◽  
pp. 1151-1157 ◽  
Author(s):  
M. P. Alves ◽  
L. Guzylack-Piriou ◽  
V. Juillard ◽  
J.-C. Audonnet ◽  
T. Doel ◽  
...  
Keyword(s):  
Disease Virus ◽  
Large Scale ◽  
Control Strategies ◽  
Foot And Mouth Disease ◽  
Mouth Disease ◽  
Innate Immune ◽  
Noticeable Effect ◽  
Mouth Disease Virus ◽  
Foot And Mouth ◽  
Natural Hosts

ABSTRACT Emergency vaccination as part of the control strategies against foot-and-mouth disease virus (FMDV) has the potential to limit virus spread and reduce large-scale culling. To reduce the time between vaccination and the onset of immunity, immunostimulatory CpG was tested for its capacity to promote early protection against FMDV challenge in pigs. To this end, CpG 2142, an efficient inducer of alpha interferon, was injected intramuscularly. Increased transcription of Mx1, OAS, and IRF-7 was identified as a sensitive measurement of CpG-induced innate immunity, with increased levels detectable to at least 4 days after injection of CpG formulated with Emulsigen. Despite this, CpG combined with an FMD vaccine did not promote protection. Pigs vaccinated 2 days before challenge had disease development, which was at least as acute as that of unvaccinated controls. All pigs vaccinated 7 days before challenge were protected without a noticeable effect of CpG. In summary, our results demonstrate the caution required when translating findings from mouse models to natural hosts of FMDV.

Evaluating vaccination strategies to control foot-and-mouth disease: a model comparison study

2014 ◽  
Vol 143 (6) ◽  
pp. 1256-1275 ◽  
Author(s):  
S. E. ROCHE ◽  
M. G. GARNER ◽  
R. L. SANSON ◽  
C. COOK ◽  
C. BIRCH ◽  
...  
Keyword(s):  
Model Comparison ◽  
Control Strategies ◽  
Foot And Mouth Disease ◽  
Simulation Models ◽  
Control Programme ◽  
Mouth Disease ◽  
Considerable Uncertainty ◽  
Vaccination Strategies ◽  
Epidemic Size ◽  
Foot And Mouth

SUMMARYSimulation models can offer valuable insights into the effectiveness of different control strategies and act as important decision support tools when comparing and evaluating outbreak scenarios and control strategies. An international modelling study was performed to compare a range of vaccination strategies in the control of foot-and-mouth disease (FMD). Modelling groups from five countries (Australia, New Zealand, USA, UK, The Netherlands) participated in the study. Vaccination is increasingly being recognized as a potentially important tool in the control of FMD, although there is considerable uncertainty as to how and when it should be used. We sought to compare model outputs and assess the effectiveness of different vaccination strategies in the control of FMD. Using a standardized outbreak scenario based on data from an FMD exercise in the UK in 2010, the study showed general agreement between respective models in terms of the effectiveness of vaccination. Under the scenario assumptions, all models demonstrated that vaccination with ‘stamping-out’ of infected premises led to a significant reduction in predicted epidemic size and duration compared to the ‘stamping-out’ strategy alone. For all models there were advantages in vaccinating cattle-only rather than all species, using 3-km vaccination rings immediately around infected premises, and starting vaccination earlier in the control programme. This study has shown that certain vaccination strategies are robust even to substantial differences in model configurations. This result should increase end-user confidence in conclusions drawn from model outputs. These results can be used to support and develop effective policies for FMD control.

scholarly journals Foot-and-Mouth Disease

2004 ◽  
Vol 17 (2) ◽  
pp. 465-493 ◽  
Author(s):  
Marvin J. Grubman ◽  
Barry Baxt
Keyword(s):  
Control Strategies ◽  
Disease Outbreaks ◽  
Foot And Mouth Disease ◽  
Developed Countries ◽  
Etiologic Agent ◽  
Mouth Disease ◽  
Receptor Interactions ◽  
Foot And Mouth ◽  
Virus Replication Cycle ◽  
Disease Free

SUMMARY Foot-and-mouth disease (FMD) is a highly contagious disease of cloven-hoofed animals. The disease was initially described in the 16th century and was the first animal pathogen identified as a virus. Recent FMD outbreaks in developed countries and their significant economic impact have increased the concern of governments worldwide. This review describes the reemergence of FMD in developed countries that had been disease free for many years and the effect that this has had on disease control strategies. The etiologic agent, FMD virus (FMDV), a member of the Picornaviridae family, is examined in detail at the genetic, structural, and biochemical levels and in terms of its antigenic diversity. The virus replication cycle, including virus-receptor interactions as well as unique aspects of virus translation and shutoff of host macromolecular synthesis, is discussed. This information has been the basis for the development of improved protocols to rapidly identify disease outbreaks, to differentiate vaccinated from infected animals, and to begin to identify and test novel vaccine candidates. Furthermore, this knowledge, coupled with the ability to manipulate FMDV genomes at the molecular level, has provided the framework for examination of disease pathogenesis and the development of a more complete understanding of the virus and host factors involved.

scholarly journals A Simulation Study of the Use of Vaccination to Control Foot-and-Mouth Disease Outbreaks Across Australia

2021 ◽  
Vol 8 ◽  
Author(s):  
Tim R. Capon ◽  
Michael G. Garner ◽  
Sorada Tapsuwan ◽  
Sharon Roche ◽  
Andrew C. Breed ◽  
...  
Keyword(s):  
Control Strategies ◽  
Foot And Mouth Disease ◽  
Mouth Disease ◽  
International Standards ◽  
Disease Spread ◽  
Diverse Range ◽  
Stakeholder Consultation ◽  
Vaccination Strategies ◽  
Spread Model ◽  
Foot And Mouth

This study examines the potential for foot-and-mouth disease (FMD) control strategies that incorporate vaccination to manage FMD spread for a range of incursion scenarios across Australia. Stakeholder consultation was used to formulate control strategies and incursion scenarios to ensure relevance to the diverse range of Australian livestock production regions and management systems. The Australian Animal Disease Spread model (AADIS) was used to compare nine control strategies for 13 incursion scenarios, including seven control strategies incorporating vaccination. The control strategies with vaccination differed in terms of their approaches for targeting areas and species. These strategies are compared with two benchmark strategies based on stamping out only. Outbreak size and duration were compared in terms of the total number of infected premises, the duration of the control stage of an FMD outbreak, and the number of vaccinated animals. The three key findings from this analysis are as follows: (1) smaller outbreaks can be effectively managed by stamping out without vaccination, (2) the size and duration of larger outbreaks can be significantly reduced when vaccination is used, and (3) different vaccination strategies produced similar reductions in the size and duration of an outbreak, but the number of animals vaccinated varied. Under current international standards for regaining FMD-free status, vaccinated animals need to be removed from the population at the end of the outbreak to minimize trade impacts. We have shown that selective, targeted vaccination strategies could achieve effective FMD control while significantly reducing the number of animals vaccinated.

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