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Space‐time clusters of dengue fever in Bangladesh

Objective  To examine the space‐time clustering of dengue fever (DF) transmission in Bangladesh using geographical information system and spatial scan statistics (SaTScan). Methods  We obtained data on monthly suspected DF cases and deaths by district in Bangladesh for the period of 2000–2009 from D...

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Bibliographic Details
Published in:Tropical medicine & international health 2012-09, Vol.17 (9), p.1086-1091
Main Authors: Banu, Shahera, Hu, Wenbiao, Hurst, Cameron, Guo, Yuming, Islam, Mohammad Zahirul, Tong, Shilu
Format: Article
Language:English
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Summary:Objective  To examine the space‐time clustering of dengue fever (DF) transmission in Bangladesh using geographical information system and spatial scan statistics (SaTScan). Methods  We obtained data on monthly suspected DF cases and deaths by district in Bangladesh for the period of 2000–2009 from Directorate General of Health Services. Population and district boundary data of each district were collected from national census managed by Bangladesh Bureau of Statistics. To identify the space‐time clusters of DF transmission a discrete Poisson model was performed using SaTScan software. Results  Space‐time distribution of DF transmission was clustered during three periods 2000–2002, 2003–2005 and 2006–2009. Dhaka was the most likely cluster for DF in all three periods. Several other districts were significant secondary clusters. However, the geographical range of DF transmission appears to have declined in Bangladesh over the last decade. Conclusion  There were significant space‐time clusters of DF in Bangladesh over the last decade. Our results would prompt future studies to explore how social and ecological factors may affect DF transmission and would also be useful for improving DF control and prevention programs in Bangladesh. Objectif:  Examiner le regroupement spatio‐temporel de la transmission de la fièvre dengue (FD) au Bangladesh en utilisant le système d’information géographique et les statistiques d’analyse spatiale (SaTScan). Méthodes:  Nous avons obtenu des données mensuelles sur les cas et les décès suspects de FD par district au Bangladesh pour la période 2000–2009, de la Direction Générale des Services de Santé. Les données sur les délimitations de la population et du district de chaque district ont été recueillies à partir du recensement national géré par le Bureau des Statistiques du Bangladesh. Afin de pouvoir identifier les regroupes spatio‐temporels de la transmission de la FD un modèle de Poisson discret a été appliqué en utilisant le logiciel SaTScan. Résultats:  La distribution spatio‐temporelle de la transmission de la FD a été regroupée lors de trois périodes: 2000–2002, 2003–2005 et 2006–2009. Dhaka a connu le regroupement le plus probable pour la FD au cours des trois périodes. Plusieurs autres districts ont connu d’importants regroupements secondaires. Cependant, l’étendue géographique de la transmission de la FD semble avoir diminué au Bangladesh au cours de la dernière décennie. Conclusion:  Il y avait d’importants regroupement
ISSN:1360-2276
1365-3156
DOI:10.1111/j.1365-3156.2012.03038.x