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Journal Article

Citation

Berry I, Berrang-Ford L. Soc. Sci. Med. 2016; 167: 140-149.

Affiliation

Department of Geography, McGill University, Montreal, Quebec, Canada. Electronic address: lea.berrangford@mcgill.ca.

Copyright

(Copyright © 2016, Elsevier Publishing)

DOI

10.1016/j.socscimed.2016.04.038

PMID

27194448

Abstract

BACKGROUND: Leishmaniasis has been estimated to cause the ninth largest burden amongst global infectious diseases. Occurrence of the disease has been anecdotally associated with periods of conflict, leading to its referral as a disease of 'guerrilla warfare.' Despite this, there have been few studies that quantitatively investigate the extent to which leishmaniasis coincides with conflict or political terror.

METHODOLOGY: This study employed a longitudinal approach to empirically test for an association between cutaneous and visceral leishmaniasis incidence with occurrence of conflict and political terror at the national level, annually for 15 years (1995-2010). Leishmaniasis incidence data were collected for 54 countries, and combined with UCDP/PRIO Armed Conflict and Amnesty International political terror datasets. Mixed effects negative binomial regression models clustered at the country-level were constructed to evaluate the incidence rate ratios against the predictors, while controlling for wealth. Additionally, to understand how and why conflict-terror may be associated with leishmaniasis incidence, we conducted a historical analysis. We identify and discuss posited causal mechanisms in the literature, and critically assessed pathways by which leishmaniasis might occur in places and times of conflict-terror.

RESULTS: There was a significant dose-response relationship for disease incidence based on increasing levels of conflict and terror. Country-years experiencing very high levels of conflict-terror were associated with a 2.38 times higher [95% CI: 1.40-4.05] and 6.02 times higher [95% CI: 2.39-15.15] incidence of cutaneous and visceral leishmaniasis, respectively. Historical analysis indicated that conflict and terror contribute to-or coincide with-leishmaniasis incidence through processes of population displacement and health system deterioration.

CONCLUSIONS: This research highlights the potentially increased risks for cutaneous and visceral leishmaniasis incidence in areas of high conflict-terror. Notably, conflict-terror may act as an empirical proxy for indirect and concomitant processes of social breakdown, migration, and instability, which emerge as the dominant processes associated with disease incidence.

Copyright © 2016 The Authors. Published by Elsevier Ltd.. All rights reserved.


Language: en

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