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    Spatial analysis of tuberculosis in an Urban West African setting: is there evidence of clustering?

    Touray, K. and Adetifa, I.A. and Jallow, A. and Rigby, Jan and Jeffries, D. and Cheung, Y.B. and Donkor, S. and Adegbola, R.A. and Hill, P.S. (2010) Spatial analysis of tuberculosis in an Urban West African setting: is there evidence of clustering? Tropical Medicine and International Health, 15 (6). pp. 664-672. ISSN 1360-2276

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    objectives To describe the pattern of tuberculosis (TB) occurrence in Greater Banjul, The Gambia with Geographical Information Systems (GIS) and Spatial Scan Statistics (SaTScan) and to determine whether there is significant TB case clustering. methods In Greater Banjul, where 80% of all Gambian TB cases arise, all patients with TB registered at chest clinics between March 2007 and February 2008 were asked to participate. Demographic, clinical characteristics and GPS co-ordinates for the residence of each consenting TB case were recorded. A spatial scan statistic was used to identify purely spatial and space–time clusters of tuberculosis among permanent residents. results Of 1145 recruited patients with TB, 84% were permanent residents with 88% living in 37 settlements that had complete maps available down to settlement level. Significant high- and low-rate spatial and space–time clusters were identified in two districts. The most likely cluster of high rate from both the purely spatial analysis and the retrospective space–time analysis were from the same geo- graphical area. A significant secondary cluster was also identified in one of the densely populated areas of the study region. conclusions There is evidence of significant clustering of TB cases in Greater Banjul, The Gambia. Systematic use of cluster detection techniques for regular TB surveillance in The Gambia may aid effective deployment of resources. However, passive case detection dictates that community-based active case detection and risk factor surveys would help confirm the presence of true clusters and their causes.

    Item Type: Article
    Keywords: tuberculosis; clustering; spatial analysis; Geographic Information Systems; The Gambia;
    Academic Unit: Faculty of Social Sciences > Geography
    Item ID: 8900
    Identification Number:
    Depositing User: Jan Rigby
    Date Deposited: 13 Oct 2017 15:51
    Journal or Publication Title: Tropical Medicine and International Health
    Publisher: Blackwell Publishing
    Refereed: Yes
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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