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Tsetse Fly (G.f. fuscipes) distribution in the Lake Victoria Basin of Uganda

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Albert, Mugenyi, Wardrop, Nicola A., Atkinson, Peter M., Torr, Stephen J. and Welburn, Sue (2015) Tsetse Fly (G.f. fuscipes) distribution in the Lake Victoria Basin of Uganda. PLoS Neglected Tropical Diseases, Volume 9 (Number 4). pp. 1-14. Article number e0003705. doi:10.1371/journal.pntd.0003705

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Official URL: http://dx.doi.org/10.1371/journal.pntd.0003705

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Abstract

Tsetse flies transmit trypanosomes, the causative agent of human and animal African trypanosomiasis. The tsetse vector is extensively distributed across sub-Saharan Africa. Trypanosomiasis maintenance is determined by the interrelationship of three elements: vertebrate host, parasite and the vector responsible for transmission. Mapping the distribution and abundance of tsetse flies assists in predicting trypanosomiasis distributions and developing rational strategies for disease and vector control. Given scarce resources to carry out regular full scale field tsetse surveys to up-date existing tsetse maps, there is a need to devise inexpensive means for regularly obtaining dependable area-wide tsetse data to guide control activities. In this study we used spatial epidemiological modelling techniques (logistic regression) involving 5000 field-based tsetse-data (G. f. fuscipes) points over an area of 40,000 km2, with satellite-derived environmental surrogates composed of precipitation, temperature, land cover, normalised difference vegetation index (NDVI) and elevation at the sub-national level. We used these extensive tsetse data to analyse the relationships between presence of tsetse (G. f. fuscipes) and environmental variables. The strength of the results was enhanced through the application of a spatial autologistic regression model (SARM). Using the SARM we showed that the probability of tsetse presence increased with proportion of forest cover and riverine vegetation. The key outputs are a predictive tsetse distribution map for the Lake Victoria basin of Uganda and an improved understanding of the association between tsetse presence and environmental variables. The predicted spatial distribution of tsetse in the Lake Victoria basin of Uganda will provide significant new information to assist with the spatial targeting of tsetse and trypanosomiasis control.

Item Type: Journal Article
Subjects: R Medicine > RA Public aspects of medicine
Divisions: Faculty of Medicine > Warwick Medical School > Health Sciences
Faculty of Medicine > Warwick Medical School > Health Sciences > Population, Evidence & Technologies (PET)
Faculty of Medicine > Warwick Medical School
Library of Congress Subject Headings (LCSH): Tsetse-flies -- Uganda, Disease management, Vector control, African trypanosomiasis
Journal or Publication Title: PLoS Neglected Tropical Diseases
Publisher: Public Library of Science
ISSN: 1935-2727
Official Date: 15 April 2015
Dates:
DateEvent
15 April 2015Published
16 March 2015Accepted
6 October 2014Submitted
Volume: Volume 9
Number: Number 4
Number of Pages: 14
Page Range: pp. 1-14
Article Number: Article number e0003705
DOI: 10.1371/journal.pntd.0003705
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
Funder: Seventh Framework Programme (European Commission) (FP7)
Grant number: 221948, ICONZ (FP7)

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