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Linking Climate to Incidence of Zoonotic Cutaneous Leishmaniasis ( L. major ) in Pre-Saharan North Africa

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Listed:
  • Lahouari Bounoua

    (Biospheric Sciences Laboratory, Code 618, NASA's Goddard Space Flight Center, Maryland, MD 20771, USA)

  • Kholoud Kahime

    (Laboratory of Ecology & Environment, Cadi Ayyad University, Marrakech 40000, Morocco)

  • Leila Houti

    (Faculty of Medicine, Sidi Bel Abbes 22000, Algeria)

  • Tara Blakey

    (Florida International University, Florida, FL 33199, USA)

  • Kristie L. Ebi

    (ClimAdapt, LLC, Los Altos CA 94022, USA)

  • Ping Zhang

    (Biospheric Sciences Laboratory, Code 618, NASA's Goddard Space Flight Center, Maryland, MD 20771, USA
    Earth Resources Technology Inc., Laurel, MD 20707, USA)

  • Marc L. Imhoff

    (Joint Global Change Research Institute, Pacific Northwest National Laboratory, College Park, MD 20740, USA)

  • Kurtis J. Thome

    (Biospheric Sciences Laboratory, Code 618, NASA's Goddard Space Flight Center, Maryland, MD 20771, USA)

  • Claire Dudek

    (Bethesda-Chevy Chase High School, MD 20814, USA)

  • Salah A. Sahabi

    (Hydrometeorological Institute of Training and Research, Oran 31025, Algeria)

  • Mohammed Messouli

    (Laboratory of Hydrobiology, Ecotoxicology and Sanitation, Cadi Ayyad University, Marrakech 40000, Morocco)

  • Baghdad Makhlouf

    (Establishment of Local Public Health, Saida 20000, Algeria)

  • Abderrahmane El. Laamrani

    (Directorate of Epidemiology and disease Control, Ministry of Health, Rabat 10010, Morocco)

  • Ali Boumezzough

    (Laboratory of Ecology & Environment, Cadi Ayyad University, Marrakech 40000, Morocco)

Abstract

Shifts in surface climate may have changed the dynamic of zoonotic cutaneous leishmaniasis (ZCL) in the pre-Saharan zones of North Africa. Caused by Leishmania major , this form multiplies in the body of rodents serving as reservoirs of the disease. The parasite is then transmitted to human hosts by the bite of a Phlebotomine sand fly (Diptera: Psychodidae) that was previously fed by biting an infected reservoir. We examine the seasonal and interannual dynamics of the incidence of this ZCL as a function of surface climate indicators in two regions covering a large area of the semi-arid Pre-Saharan North Africa. Results suggest that in this area, changes in climate may have initiated a trophic cascade that resulted in an increase in ZCL incidence. We find the correlation between the rainy season precipitation and the same year Normalized Difference Vegetation Index (NDVI) to be strong for both regions while the number of cases of ZCL incidence lags the precipitation and NDVI by 2 years. The zoonotic cutaneous leishmaniasis seasonal dynamic appears to be controlled by minimum temperatures and presents a 2-month lag between the reported infection date and the presumed date when the infection actually occurred. The decadal increase in the number of ZCL occurrence in the region suggests that changes in climate increased minimum temperatures sufficiently and created conditions suitable for endemicity that did not previously exist. We also find that temperatures above a critical range suppress ZCL incidence by limiting the vector’s reproductive activity.

Suggested Citation

  • Lahouari Bounoua & Kholoud Kahime & Leila Houti & Tara Blakey & Kristie L. Ebi & Ping Zhang & Marc L. Imhoff & Kurtis J. Thome & Claire Dudek & Salah A. Sahabi & Mohammed Messouli & Baghdad Makhlouf &, 2013. "Linking Climate to Incidence of Zoonotic Cutaneous Leishmaniasis ( L. major ) in Pre-Saharan North Africa," IJERPH, MDPI, vol. 10(8), pages 1-20, July.
    • Handle: RePEc:gam:jijerp:v:10:y:2013:i:8:p:3172-3191:d:27632
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    References listed on IDEAS

    as
    1. Luis Fernando Chaves & Mercedes Pascual, 2006. "Climate Cycles and Forecasts of Cutaneous Leishmaniasis, a Nonstationary Vector-Borne Disease," PLOS Medicine, Public Library of Science, vol. 3(8), pages 1-9, August.
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    Cited by:

    1. Karima El-Mouhdi & Abdelkader Chahlaoui & Samia Boussaa & Mohammed Fekhaoui, 2020. "Sand Flies Control: A Review of the Knowledge of Health Professionals and the Local Community, Province of El Hajeb, Morocco," IJERPH, MDPI, vol. 17(22), pages 1-14, November.
    2. Kahime Kholoud & Sereno Denis & Bounoua Lahouari & Moulay Abdelmonaim El Hidan & Bouhout Souad, 2018. "Management of Leishmaniases in the Era of Climate Change in Morocco," IJERPH, MDPI, vol. 15(7), pages 1-8, July.

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