Abstract:
:Detailed results on the dynamics of cowpox virus infection in four natural populations of the field vole, Microtus agrestis, are presented. Populations were sampled every 4 weeks (8 weeks in mid-winter) for 6 years. The purpose was to examine the relationships between overall or susceptible host abundance (N, S) and both the number of infected hosts (I) and the prevalence of infection (I/N). Overall, both I and I/N increased with N. However, evidence for a threshold abundance, below which infection was not found, was at best equivocal in spite of the wide range of abundances sampled. Cross-correlation analyses reflected annual and multi-annual cycles in N, I, S and I/N, but whereas N was most strongly correlated with contemporary values of I and I/N, in the case of S, the strongest correlations were with values 1 to 2 months preceding the values of I and I/N. There was no evidence for a 'juvenile dilution effect' (prevalence decreasing with abundance as new susceptibles flush into the population) and only weak evidence of a time-delayed effect of abundance on the number infected. We argue that these effects may occur only in systems with characteristics that are not found here. Transfer function analyses, which have been neglected in epidemiology, were applied. These models, with ln(S) as the input parameter, in spite of their simplicity, could be linked closely to conventional formulations of the transmission process and were highly effective in predicting the number infected. By contrast, transfer function models with ln(N) as the input parameter were less successful in predicting the number infected and/or were more complex and more difficult to interpret. Nonetheless, overall, we contend that while monitoring numbers susceptible has most to offer, monitoring overall abundance may provide valuable insights into the dynamics of infection.
journal_name
Epidemicsjournal_title
Epidemicsauthors
Begon M,Telfer S,Burthe S,Lambin X,Smith MJ,Paterson Sdoi
10.1016/j.epidem.2008.10.001subject
Has Abstractpub_date
2009-03-01 00:00:00pages
35-46issue
1eissn
1755-4365issn
1878-0067pii
S1755-4365(08)00005-4journal_volume
1pub_type
杂志文章相关文献
Epidemics文献大全abstract::Mathematical models of disease transmission are used to improve our understanding of patterns of infection and to identify factors influencing them. During recent public and animal health crises, such as pandemic influenza, Ebola, Zika, foot-and-mouth disease, models have made important contributions in addressing pol...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2017.12.003
更新日期:2018-06-01 00:00:00
abstract::Healthcare-associated infections cause significant patient morbidity and mortality, and contribute to growing healthcare costs, whose effects may be felt most strongly in developing countries. Active surveillance systems, hospital staff compliance, including hand hygiene, and a rational use of antimicrobials are among...
journal_title:Epidemics
pub_type: 杂志文章,多中心研究
doi:10.1016/j.epidem.2018.11.001
更新日期:2019-03-01 00:00:00
abstract::Disease models which take explicit account of heterogeneities in the risk of infection offer significant advantages over models in which the risk of infection is assumed to be uniform across all hosts. However, estimating the incidence rate (force of infection) in the different at-risk (exposure) groups is no easy mat...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2013.04.002
更新日期:2013-06-01 00:00:00
abstract:OBJECTIVE:Previous HPV models have only included genital transmission, when evidence suggests that transmission between several anatomical sites occurs. We compared model predictions of population-level HPV vaccination effectiveness against genital HPV16 infection in women, using a 1) uni-site (genital site), and a 2) ...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2017.08.001
更新日期:2017-12-01 00:00:00
abstract:OBJECTIVES:There has been a growing concern over Zika virus (ZIKV) infection, particularly since a probable link between ZIKV infection during pregnancy and microcephaly in the baby was identified. The present study aimed to estimate a theoretical risk of microcephaly during pregnancy with ZIKV infection in Northeaster...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2016.03.001
更新日期:2016-06-01 00:00:00
abstract::Many pathogens of conservation concern circulate endemically within natural wildlife reservoir hosts and it is imperative to understand the individual and ecological drivers of natural transmission dynamics, if any threat to a related endangered species is to be assessed. Our study highlights the key drivers of infect...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2019.100352
更新日期:2019-09-01 00:00:00
abstract::The effectiveness of vaccinating males against the human papillomavirus (HPV) remains a controversial subject. Many existing studies conclude that increasing female coverage is more effective than diverting resources into male vaccination. Recently, several empirical studies on HPV immunization have been published, pr...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2015.01.003
更新日期:2015-06-01 00:00:00
abstract::Real-time forecasts of infectious diseases can help public health planning, especially during outbreaks. If forecasts are generated from mechanistic models, they can be further used to target resources or to compare the impact of possible interventions. However, paremeterising such models is often difficult in real ti...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2016.11.003
更新日期:2018-03-01 00:00:00
abstract::The susceptibility of the English and Welsh fish farming and fisheries industry to emergent diseases is assessed using a stochastic simulation model. The model dynamics operate on a network comprising directed transport and river contacts, as well as undirected local and fomite transmissions. The directed connections ...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2010.08.001
更新日期:2010-12-01 00:00:00
abstract::Previous exposure to influenza viruses confers cross-immunity against future infections with related strains. However, this is not always accounted for explicitly in mathematical models used for forecasting during influenza outbreaks. We show that, if an influenza outbreak is due to a strain that is similar to one tha...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2020.100432
更新日期:2020-12-17 00:00:00
abstract:BACKGROUND:Brazil has the second highest annual number of new leprosy cases. The aim of this study is to formally compare predictions of future new case detection rate (NCDR) trends and the annual probability of NCDR falling below 10/100,000 of four different modelling approaches in four states of Brazil: Rio Grande do...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2017.01.005
更新日期:2017-03-01 00:00:00
abstract::Human infection with Middle East Respiratory Syndrome Coronavirus (MERS-CoV) is driven by recurring dromedary-to-human spill-over events, leading decision-makers to consider dromedary vaccination. Dromedary vaccine candidates in the development pipeline are showing hopeful results, but gaps in our understanding of the...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2019.100350
更新日期:2019-12-01 00:00:00
abstract::Due to the COVID-19 pandemic, many countries have implemented a complete lockdown of their population that may not be sustainable for long. To identify the best strategy to replace this full lockdown, sophisticated models that rely on mobility data have been developed. In this study, using the example of France as a c...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2020.100424
更新日期:2020-12-01 00:00:00
abstract::Disease is a major constraint on animal production and welfare in agriculture and aquaculture. Movement of animals between farms is one of the most significant routes of disease transmission and is particularly hard to control for pathogens with subclinical infection. Renibacterium salmoninarum causes bacterial kidney...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2011.10.002
更新日期:2011-09-01 00:00:00
abstract::The existence of primary pneumonic plague outbreaks raises concerns over the use of the causative bacteria as an aerosol-based bioweapon. We employed an individual-based model, parameterised using published personal contact information, to assess the severity of a deliberate release in a discrete community, under the ...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2011.03.001
更新日期:2011-06-01 00:00:00
abstract::Public health-related decision-making on policies aimed at controlling epidemics is increasingly evidence-based, exploiting multiple sources of data. Policy makers rely on complex models that are required to be robust, realistically approximating epidemics and consistent with all relevant data. Meeting these requireme...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2014.09.004
更新日期:2015-03-01 00:00:00
abstract::The classical antigen presentation pathway consists of two monomorphic (proteasome and TAP) and one polymorphic components (MHC Class I). Viruses can escape CTL responses by mutating an epitope so that it is no longer correctly processed by the pathway. Whereas escape mutations that affect MHC binding are typically no...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2010.05.003
更新日期:2010-09-01 00:00:00
abstract::Producing timely, well-informed and reliable forecasts for an ongoing epidemic of an emerging infectious disease is a huge challenge. Epidemiologists and policy makers have to deal with poor data quality, limited understanding of the disease dynamics, rapidly changing social environment and the uncertainty on effects ...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2017.02.010
更新日期:2018-03-01 00:00:00
abstract::The sociological and biological factors which gave rise to the three pandemic waves of Spanish influenza in England during 1918-19 are still poorly understood. Symptom reporting data available for a limited set of locations in England indicates that reinfection in multiple waves occurred, suggesting a role for loss of...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2014.07.004
更新日期:2014-09-01 00:00:00
abstract:INTRODUCTION:Mathematical models that incorporate HIV disease progression dynamics can estimate the potential impact of strategies that delay HIV disease progression and reduce infectiousness for persons not on antiretroviral therapy (ART). Suppressive treatment of HIV-positive persons co-infected with herpes simplex v...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2017.12.001
更新日期:2018-06-01 00:00:00
abstract::Dengue dynamics are shaped by the complex interplay between several factors, including vector seasonality, interaction between four virus serotypes, and inapparent infections. However, paucity or quality of data do not allow for all of these to be taken into account in mathematical models. In order to explore separate...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2018.08.004
更新日期:2019-03-01 00:00:00
abstract::Using Medicare claims data on prescriptions of oseltamivir dispensed to people 65 years old and older, we present a descriptive analysis of patterns of influenza activity in the United States for 579 core-based statistical areas (CBSAs) from the 2010-2011 through the 2015-2016 influenza seasons. During this time, 1,01...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2018.08.002
更新日期:2019-03-01 00:00:00
abstract::Rapidly evolving pathogens present a major conceptual and mathematical challenge to our understanding of disease dynamics. For these pathogens, the simulation of disease dynamics requires the use of computational models that incorporate pathogen evolution. Currently, these models are limited by two factors. First, the...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2009.05.003
更新日期:2009-06-01 00:00:00
abstract::Syndromic and virological data are routinely collected by many countries and are often the only information available in real time. The analysis of surveillance data poses many statistical challenges that have not yet been addressed. For instance, the fraction of cases that seek healthcare and are thus detected is oft...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2011.11.001
更新日期:2012-03-01 00:00:00
abstract:BACKGROUND:From 2007 to 2009, the Netherlands experienced a major Q fever epidemic. Long-term serological follow-up of acute Q fever patients enabled the investigation of longitudinal antibody responses and estimating the onset of the seroresponse in individual patients. METHODS:All available IgG and IgM phase I and I...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2015.07.001
更新日期:2015-12-01 00:00:00
abstract::Dengue is one of the most important and wide-spread viral infections affecting human populations. The last few decades have seen a dramatic increase in the global burden of dengue, with the virus now being endemic or near-endemic in over 100 countries world-wide. A recombinant tetravalent vaccine candidate (CYD-TDV) h...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2016.05.003
更新日期:2016-09-01 00:00:00
abstract::Computer models have proven to be useful tools in studying epidemic disease in human populations. Such models are being used by a broader base of researchers, and it has become more important to ensure that descriptions of model construction and data analyses are clear and communicate important features of model struc...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2016.12.001
更新日期:2017-06-01 00:00:00
abstract::Episodic high-risk sexual behavior is common and can have a profound effect on HIV transmission. In a model of HIV transmission among men who have sex with men (MSM), changing the frequency, duration and contact rates of high-risk episodes can take endemic prevalence from zero to 50% and more than double transmissions...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2012.11.003
更新日期:2013-03-01 00:00:00
abstract::Inference on disease dynamics is typically performed using case reporting time series of symptomatic disease. The inferred dynamics will vary depending on the reporting patterns and surveillance system for the disease in question, and the inference will miss mild or underreported epidemics. To eliminate the variation ...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2015.02.005
更新日期:2015-09-01 00:00:00
abstract::The past two decades have seen major outbreaks of influenza viruses and flaviviruses that are spread at least in part by migratory birds. Although much new information has accumulated on the natural history of the viruses, and on the geography of migration by individual bird species, no synthesis has been achieved reg...
journal_title:Epidemics
pub_type: 杂志文章
doi:10.1016/j.epidem.2009.11.003
更新日期:2009-12-01 00:00:00