Disparities in risks of malaria associated with climatic variability among women, children and elderly in the Chittagong hill tracts of Bangladesh

Emeto, Theophilus I., Adegboye, Oyelola A., Rumi, Reza A., Khan, Mahboob-Ul I., Adegboye, Majeed, Khan, Wasif A., Rahman, Mahmudur, Streatfield, Peter K., and Rahman, Kazi M. (2020) Disparities in risks of malaria associated with climatic variability among women, children and elderly in the Chittagong hill tracts of Bangladesh. International Journal of Environmental Research and Public Health, 17 (24). 9469.

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Abstract

Malaria occurrence in the Chittagong Hill Tracts in Bangladesh varies by season and year, but this pattern is not well characterized. The role of environmental conditions on the occurrence of this vector-borne parasitic disease in the region is not fully understood. We extracted information on malaria patients recorded in the Upazila (sub-district) Health Complex patient registers of Rajasthali in Rangamati district of Bangladesh from February 2000 to November 2009. Weather data for the study area and period were obtained from the Bangladesh Meteorological Department. Non-linear and delayed effects of meteorological drivers, including temperature, relative humidity, and rainfall on the incidence of malaria, were investigated. We observed significant positive association between temperature and rainfall and malaria occurrence, revealing two peaks at 19 °C (logarithms of relative risks (logRR) = 4.3, 95% CI: 1.1–7.5) and 24.5 °C (logRR = 4.7, 95% CI: 1.8–7.6) for temperature and at 86 mm (logRR = 19.5, 95% CI: 11.7–27.3) and 284 mm (logRR = 17.6, 95% CI: 9.9–25.2) for rainfall. In sub-group analysis, women were at a much higher risk of developing malaria at increased temperatures. People over 50 years and children under 15 years were more susceptible to malaria at increased rainfall. The observed associations have policy implications. Further research is needed to expand these findings and direct resources to the vulnerable populations for malaria prevention and control in the Chittagong Hill Tracts of Bangladesh and the region with similar settings

Item ID: 65425
Item Type: Article (Research - C1)
ISSN: 1660-4601
Keywords: climatic variability; malaria; vulnerable groups; Chittagong Hill Tracts; Bangladesh
Copyright Information: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open accessarticle distributed under the terms and conditions of the Creative Commons Attribution(CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Funders: Australian Agency for International Development (AusAID)
Projects and Grants: AusAID ADRA0800289
Date Deposited: 03 Jan 2021 23:05
FoR Codes: 49 MATHEMATICAL SCIENCES > 4905 Statistics > 490501 Applied statistics @ 40%
42 HEALTH SCIENCES > 4202 Epidemiology > 420203 Environmental epidemiology @ 30%
41 ENVIRONMENTAL SCIENCES > 4104 Environmental management > 410402 Environmental assessment and monitoring @ 30%
SEO Codes: 92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920109 Infectious Diseases @ 100%
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