Skip to Main content Skip to Navigation
Journal articles

Topography and Land Cover of Watersheds Predicts the Distribution of the Environmental Pathogen Mycobacterium ulcerans in Aquatic Insects

Abstract : Background: An understanding of the factors driving the distribution of pathogens is useful in preventing disease. Often we achieve this understanding at a local microhabitat scale; however the larger scale processes are often neglected. This can result in misleading inferences about the distribution of the pathogen, inhibiting our ability to manage the disease. One such disease is Buruli ulcer, an emerging neglected tropical disease afflicting many thousands in Africa, caused by the environmental pathogen Mycobacterium ulcerans. Herein, we aim to describe the larger scale landscape process describing the distribution of M. ulcerans.Methodology: Following extensive sampling of the community of aquatic macroinvertebrates in Cameroon, we select the 5 dominant insect Orders, and conduct an ecological niche model to describe how the distribution of M. ulcerans positive insects changes according to land cover and topography. We then explore the generalizability of the results by testing them against an independent dataset collected in a second endemic region, French Guiana.Principal Findings: We find that the distribution of the bacterium in Cameroon is accurately described by the land cover and topography of the watershed, that there are notable seasonal differences in distribution, and that the Cameroon model does not predict the distribution of M. ulcerans in French Guiana.Conclusions/Significance: Future studies of M. ulcerans would benefit from consideration of local structure of the local stream network in future sampling, and further work is needed on the reasons for notable differences in the distribution of this species from one region to another. This work represents a first step in the identification of large-scale environmental drivers of this species, for the purposes of disease risk mapping.
Complete list of metadata

Cited literature [47 references]  Display  Hide  Download
Contributor : Gestionnaire Hal-Upmc <>
Submitted on : Thursday, July 7, 2016 - 10:19:51 AM
Last modification on : Wednesday, April 14, 2021 - 3:41:17 AM
Long-term archiving on: : Saturday, October 8, 2016 - 11:09:40 AM


Publication funded by an institution


Distributed under a Creative Commons Attribution 4.0 International License



Kevin Carolan, Andres Garchitorena, Gabriel E. García-Peña, Aaron Morris, Jordi Landier, et al.. Topography and Land Cover of Watersheds Predicts the Distribution of the Environmental Pathogen Mycobacterium ulcerans in Aquatic Insects. PLoS Neglected Tropical Diseases, Public Library of Science, 2014, 8 (11), pp.e3298. ⟨10.1371/journal.pntd.0003298⟩. ⟨hal-01342938⟩



Record views


Files downloads