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Title: Use of geographical information system (GIS) and global positioning system (GPS) for dengue and dengue haemorrhagic fever control in Sri Lanka.
Authors: Jayasooriyaa, G A J S K
Senaratnea, S M L
Wijesingheb, W M C M
Kusumawathiea, P H D
Gunatilakec, J
Issue Date: Dec-2009
Publisher: WHO Regional Office for South-East Asia.
Place of publication: New Delhi
Language: English
Abstract: The dengue virus causing dengue fever (DF) and dengue haemorrhagic fever (DHF) is transmitted by the female mosquitoes – Aedes aegypti and Ae. albopictus. Because DF/DHF is a local and focal disease, identification of finer-scale risk areas and application of vector control interventions in these areas are important actions for disease prevention and control. The present study was carried out to: (a) identify DF/DHF risk levels of different Grama Niladari (GN) areas under the jurisdiction of the Medical Officer of Health (MOH), Kadugannawa area, Kandy district; and (b) determine the impact of Aedes larval control in DF/DHF high-risk GN areas on the overall DF/DHF burden in the MOH area. Ae. aegypti and Ae. albopictus density (Breteau index) in each GN area of MOH Kadugannawa was determined by immature (larvae and pupae) surveys. Details of suspected and serologically confirmed DF/DHF cases were collected from MOH Kadugannawa and georeferenced using global positioning system (GPS) receivers. Data on Ae. aegypti and Ae. albopictus density and DF/DHF cases were analysed and mapped using the geographical information system (GIS) to identify the DF/DHF risk levels in different GN areas of the MOH. With reference to risk mapping, health education and source reduction (interventions) were carried out in high-risk GN areas (areas with DF/DHF cases and Ae. aegypti prevalence) in July 2008. Kandy district showed an increasing trend of DF/DHF since 2001. The MOH area Kadugannawa also followed the same trend from January 2004 to July 2008, contributing 18.8%–37.5% of the monthly case load in the district in the period January–July 2008. Following the intervention in July 2008, MOH Kadugannawa showed a decreasing trend of DF/DHF during August–December 2008 and contributed 22.7%–8.8% of monthly DF/DHF cases in Kandy district. We conclude that identification of finer-scale DF/DHF risk areas using GIS and GPS and application of vector control interventions in high-risk GN areas is very useful for DF/DHF prevention and control.
Description: Dengue Bulletin.2009 Dec; 33:11-20
Keywords: Dengue Hemorrhagic Fever --prevention and control
Dengue fever
Sri Lanka
ISSN: 0250-8362
Appears in Collections:Dengue Bulletin

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