Revealing the microscale spatial signature of dengue transmission and immunity in an urban population.

TitleRevealing the microscale spatial signature of dengue transmission and immunity in an urban population.
Publication TypeJournal Article
Year of Publication2012
AuthorsSalje H, Lessler J, Endy TP, Curriero FC, Gibbons RV, Nisalak A, Nimmannitya S, Kalayanarooj S, Jarman RG, Thomas SJ, Burke DS, Cummings DAT
JournalProc Natl Acad Sci U S A
Volume109
Issue24
Pagination9535-8
Date Published2012 Jun 12
ISSN1091-6490
KeywordsCluster Analysis, Dengue, Humans, Urban Population
Abstract

It is well-known that the distribution of immunity in a population dictates the future incidence of infectious disease, but this process is generally understood at individual or macroscales. For example, herd immunity to multiple pathogens has been observed at national and city levels. However, the effects of population immunity have not previously been shown at scales smaller than the city (e.g., neighborhoods). In particular, no study has shown long-term effects of population immunity at scales consistent with the spatial scale of person-to-person transmission. Here, we use the location of dengue patients' homes in Bangkok with the serotype of the infecting pathogen to investigate the spatiotemporal distribution of disease risk at small spatial scales over a 5-y period. We find evidence for localized transmission at distances of under 1 km. We also observe patterns of spatiotemporal dependence consistent with the expected impacts of homotypic immunity, heterotypic immunity, and immune enhancement of disease at these distances. Our observations indicate that immunological memory of dengue serotypes occurs at the neighborhood level in this large urban setting. These methods have broad applications to studying the spatiotemporal structure of disease risk where pathogen serotype or genetic information is known.

DOI10.1073/pnas.1120621109
Alternate JournalProc. Natl. Acad. Sci. U.S.A.
PubMed ID22645364
PubMed Central IDPMC3386131
Grant List1U54GM088491-0109 / GM / NIGMS NIH HHS / United States
R01 GM090204 / GM / NIGMS NIH HHS / United States
R01GM090204 / GM / NIGMS NIH HHS / United States
U54 GM088491 / GM / NIGMS NIH HHS / United States
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