A high-resolution geospatial surveillance-response system for malaria elimination in Solomon Islands and Vanuatu

Malaria Journal

Research

Archie CA Clements¹  Gerard C Kelly¹  Marcel Tanner²  Kevin Palmer³  Willie Batarii⁴  Hugo Bugoro⁴  Erick Hale⁴  Albino Bobogare⁴  George Taleo⁵  Wesley Donald⁵  Johnny Nausien⁵  John Smale⁶  Andrew Vallely⁷  Lasse S Vestergaard⁸ 

[1] Infectious Disease Epidemiology Unit, School of Population Health, University of Queensland, Brisbane, Australia;Infectious Disease Epidemiology Unit, School of Population Health, University of Queensland, Brisbane, Australia;Swiss Tropical & Public Health Institute, Basel, Switzerland;University of Basel, Basel, Switzerland;John A. Burns School of Medicine, University of Hawaii, Honolulu, USA;Ministry of Health and Medical Services, Vector Borne Diseases Control Programme, Honiara, Solomon Islands;Ministry of Health, Vector Borne Diseases Control Programme, Port Vila, Vanuatu;School of Public Health, Griffith University, Brisbane, Australia;The Kirby Institute for infection and immunity in society, University of New South Wales, Sydney, Australia;World Health Organization, Western Pacific Region, Manila, Philippines;

关键词: Malaria elimination;    Surveillance;    Geographic information systems (GIS);    Spatial decision support systems (SDSS);    Mapping;   

DOI  :  10.1186/1475-2875-12-108

 received in 2012-11-23, accepted in 2013-03-14,  发布年份 2013

来源: Springer

【 摘 要 】

BackgroundA high-resolution surveillance-response system has been developed within a geographic information system (GIS) to support malaria elimination in the Pacific. This paper examines the application of a GIS-based spatial decision support system (SDSS) to automatically locate and map the distribution of confirmed malaria cases, rapidly classify active transmission foci, and guide targeted responses in elimination zones.MethodsCustomized SDSS-based surveillance-response systems were developed in the three elimination provinces of Isabel and Temotu, Solomon Islands and Tafea, Vanuatu. Confirmed malaria cases were reported to provincial malaria offices upon diagnosis and updated into the respective SDSS as part of routine operations throughout 2011. Cases were automatically mapped by household within the SDSS using existing geographical reconnaissance (GR) data. GIS queries were integrated into the SDSS-framework to automatically classify and map transmission foci based on the spatiotemporal distribution of cases, highlight current areas of interest (AOI) regions to conduct foci-specific targeted response, and extract supporting household and population data. GIS simulations were run to detect AOIs triggered throughout 2011 in each elimination province and conduct a sensitivity analysis to calculate the proportion of positive cases, households and population highlighted in AOI regions of a varying geographic radius.ResultsA total of 183 confirmed cases were reported and mapped using the SDSS throughout 2011 and used to describe transmission within a target population of 90,354. Automatic AOI regions were also generated within each provincial SDSS identifying geographic areas to conduct response. 82.5% of confirmed cases were automatically geo-referenced and mapped at the household level, with 100% of remaining cases geo-referenced at a village level. Data from the AOI analysis indicated different stages of progress in each province, highlighting operational implications with regards to strategies for implementing surveillance-response in consideration of the spatiotemporal nature of cases as well as logistical and financial constraints of the respective programmes.ConclusionsGeospatial systems developed to guide Pacific Island malaria elimination demonstrate the application of a high resolution SDSS-based approach to support key elements of surveillance-response including understanding epidemiological variation within target areas, implementing appropriate foci-specific targeted response, and consideration of logistical constraints and costs.

【 授权许可】

CC BY   
© Kelly et al.; licensee BioMed Central Ltd. 2013