Quantifying Heterogeneities in Dengue Virus Transmission Dynamics

量化登革热病毒传播动力学的异质性

• 批准号: 9250054
• 负责人: THOMAS WALLACE SCOTT
• 金额: $ 184.25万
• 依托单位: UNIVERSITY OF CALIFORNIA AT DAVIS
• 依托单位国家: 美国
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-05-01 至 2019-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/9250054
• 关键词: Accounting; Address; Aedes; Affect; Antiviral Agents; Arboviruses; Area; Bayesian Modeling; Behavior; Behavioral Sciences; Biological Models; Blood; Cellular Phone; Clinic; Clinical; Communities; Country; Culicidae; Data; Dengue; Dengue Infection; Dengue Virus; Detection; Development; Disease; Entomology; Epidemiology; Evaluation; Exposure to; Failure; Foundations; Health; Heterogeneity; Human; Individual; Infection; Insecta; Instruction; Intervention; Investigation; Joints; Knowledge; Literature; Location; Longitudinal cohort study; Measures; Medical; Medical Research; Methods; Molecular; Monitor; Nurses; Participant; Perception; Persons; Peru; Peruvian; Population; Prevention; Prevention program; Prevention strategy; Principal Investigator; Process; Prospective Studies; Public Health; Research; Research Infrastructure; Research Project Grants; Risk; Role; Running; Science; Series; Severities; Severity of illness; Social Behavior; Source; System; Technology; Temperature; Testing; Thailand; Time; Touch sensation; Variant; Vector-transmitted infectious disease; Viremia; Virulence; Virus; Virus Diseases; Work; base; behavioral response; burden of illness; design; disorder prevention; dynamic system; epidemiology study; experience; experimental study; exposed human population; feeding; human morbidity; human mortality; improved; innovation; insight; mathematical model; novel; pathogen; prevent; programs; public health relevance; simulation; social; success; theories; transmission process; vaccine delivery; vector control; vector transmission; viral transmission

DESCRIPTION (provided by applicant): Current knowledge of dengue virus (DENV) transmission provides, at best, only a partial understanding of a complicated and dynamic system with a public health track record that has more failures than successes. An important part ofthe problems is that the foundation for contemporary interventions includes a series of longstanding, but untested, assumptions based on a relatively small portion ofthe human population; i.e., people who are convenient to study because they manifest clinically apparent disease. Approaching dengue from the perspective of people with overt illness has produced an extensive body of valuable literature. It has not, however, fully embraced heterogeneities in virus transmission dynamics that are increasingly recognized as key missing information in the struggle to control the most important insect-transmitted viral infection of humans. Only in the last 20 years there have been significant efforts to carry out comprehensive longitudinal dengue studies. Our research team was integrally involved in two prominent longitudinal dengue research projects in Iquitos, Peru and Kamphaeng Phet, Thailand. Our proposed POl represents the next crucial step in this line of inquiry. By studying people across the entire continuum of disease, including people with clinically inapparent and mild infections, we aim to quantify heterogeneities in human variables that affect DENV transmission dynamics and prevention. To do this, we will exploit the infrastructure we assembled over the past 14 years at our Iquitos study area. Our POl aims to help fill the void between understanding transmission dynamics and effective disease prevention by defining, for the first time, the contribution of the understudied majority of DENV infected people (the estimated 294 million with inapparent and mild infections) and the contributions of epidemiological, entomological, and socio-behavioral sources of heterogeneity to the dynamics of DENV transmission. By accounting for factors underlying variation in each person's contribution to transmission we will be able to better determine the type and extent of effort needed to prevent virus transmission and, thus, provide new insights for improved dengue prevention. RELEVANCE (See instructions): An estimated 390 million people in 128 at risk countries experience a DENV infection each year. Dengue viruses cause more human morbidity and mortality than any other arthropod-borne virus. It is the most rapidly advancing vector-borne disease in the world and it serves as a model system for transmission of vector-borne pathogens in general. An improved understanding of DENV transmission dynamics, concepts, and theory will fill critical knowledge gaps and significantly improve disease prevention programs.

描述(由申请人提供)：目前关于登革热病毒(DENV)传播的知识充其量只能提供对一个具有失败多于成功的公共卫生记录的复杂而动态的系统的部分了解。问题的一个重要部分是，当代干预措施的基础包括一系列长期存在但未经检验的假设，这些假设基于相对较小的一部分人口；即那些因为临床上表现出明显的疾病而便于研究的人。从有明显疾病的人的角度来看待登革热，产生了大量有价值的文献。然而，它还没有完全接受病毒传播动态中的异质性，这些异质性越来越被认为是控制人类最重要的昆虫传播病毒感染的斗争中的关键缺失信息。只是在过去20年里，才作出重大努力，开展全面的纵向登革热研究。我们的研究团队全面参与了秘鲁伊基托斯和泰国Kamphaeng Phet的两个重要的纵向登革热研究项目。我们提议的POL代表着这一调查路线的下一个关键步骤。通过研究整个疾病连续体中的人，包括临床上不明显和轻微感染的人，我们的目标是量化影响DENV传播动态和预防的人类变量的异质性。为此，我们将利用我们在过去14年中在伊基托斯研究区组装的基础设施。我们的POL旨在通过首次定义研究不足的大多数DENV感染者(约2.94亿隐性和轻度感染患者)的贡献，以及流行病学、昆虫学和社会行为异质性来源对DENV传播动力学的贡献，帮助填补了解传播动力学和有效预防疾病之间的空白。通过考虑每个人对传播的贡献的潜在差异因素，我们将能够更好地确定预防病毒传播所需的努力的类型和程度，从而为改进登革热预防提供新的见解。相关性(见说明)：在128个高危国家中，估计每年有3.9亿人感染DENV。登革热病毒导致的人类发病率和死亡率比任何其他节肢动物传播的病毒都要高。它是世界上进展最快的病媒传播疾病，它是传播病媒传播病原体的模式系统。提高对DENV传播动力学、概念和理论的理解将填补关键的知识空白，并显著改进疾病预防计划。