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Impact of Environmental and Climate Factors on Spatial Distribution of Cutaneous Leishmaniasis in Northeastern Iran: Utilizing Remote Sensing



Shirzadi MR1 ; Javanbakht M2 ; Vatandoost H3, 4 ; Jesri N5 ; Saghafipour A6 ; Fouladifard R7 ; Omidioskouei A6
Authors
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Authors Affiliations
  1. 1. Communicable Diseases Management Center, Ministry of Health and Medical Education, Tehran, Iran
  2. 2. Department of Remote Sensing and GIS, Faculty of Geography, Tehran University, Tehran, Iran
  3. 3. Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Department of Chemical Pollutants and Pesticides, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
  5. 5. Remote Sensing and GIS Centre, Shahid Beheshti University, Tehran, Iran
  6. 6. Department of Public Health, Faculty of Health, Qom University of Medical Sciences, Qom, Iran
  7. 7. Research Center for Environmental Pollutants, Qom University of Medical Sciences, Qom, Iran

Source: Journal of Arthropod-Borne Diseases Published:2020

Abstract

Background: Cutaneous leishmaniasis (CL) is a dermal and parasitic disease.. The aim of this study was to determine the effect of environmental and climate factors on spatial distribution of CL in northeastern Iran by utilizing remote sensing from 20 March 2016 to 19 March 2017. Methods: In this ecological study, the data were divided into two parts: The descriptive data on human CL cases were gathered from Communicable Diseases center of Iran. The remote sensing techniques and satellite imagery data (TRMM, MODIS-Aqua, MODIS-Terra and AMSR-2 with spatial resolution 0.25°, 0.05°, 5600m and 10km) of environmental and climate factors were used to determine the spatial pattern changes of cutaneous leishmaniasis incidence. Results: The incidence of CL in North Khorasan, Razavi Khorasan, and South Khorasan was 35.80 per 100,000 people (309/863092), 34.14 per 100,000 people (2197/6,434,501) and 7.67 per 100,000 people (59/768,898), respectively. The incidence of CL had the highest correlation with soil moisture and evapotranspiration. Moreover, the incidence of disease was significantly correlated with Normalized Difference Vegetation Index (NDVI) and air humidity while it had the lowest correlation with rainfall. Furthermore, the CL incidence had an indirect correlation relation with the air temperature meaning that with an increase in the temperature, the incidence of disease decreased. Conclusion: As such, the incidence of disease was also higher in the northern regions; most areas of North Khorasan and northern regions of Razavi Khorasan; where the rainfall, vegetation, specific humidity, evapotranspiration, and soil moisture was higher than the southern areas. © 2020 Tehran University of Medical Sciences. All rights reserved.
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