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Transmission ecosystems of Echinococcus multilocularis in China and Central Asia

  • PATRICK GIRAUDOUX (a1) (a2), FRANCIS RAOUL (a1), EVE AFONSO (a1), ISKENDER ZIADINOV (a3), YURONG YANG (a4), LI LI (a5), TIAOYING LI (a6), JEAN-PIERRE QUÉRÉ (a7), XIAOHUI FENG (a8), QIAN WANG (a6), HAO WEN (a8), AKIRA ITO (a9) and PHILIP S. CRAIG (a10)...
Summary

From continental to regional scales, the zoonosis alveolar echinococcosis (AE) (caused by Echinococcus multilocularis) forms discrete patches of endemicity within which transmission hotspots of much larger prevalence may occur. Since the late 80s, a number of hotspots have been identified in continental Asia, mostly in China, wherein the ecology of intermediate host communities has been described. This is the case in south Gansu, at the eastern border of the Tibetan plateau, in south Ningxia, in the western Tian Shan of Xinjiang, and in the Alay valley of south Kyrgyzstan. Here we present a comparative natural history and characteristics of transmission ecosystems or ecoscapes. On this basis, regional types of transmission and their ecological characteristics have been proposed in a general framework. Combining climatic, land cover and intermediate host species distribution data, we identified and mapped 4 spatially distinct types of transmission ecosystems typified by the presence of one of the following small mammal ‘flagship’ species: Ellobius tancrei, Ochotona curzoniae, Lasiopodomys brandtii or Eospalax fontanierii. Each transmission ecosystem had its own characteristics which can serve as a reference for further in-depth research in the transmission ecology of E. multilocularis. This approach may be used at fine spatial scales to characterize other poorly known transmission systems of the large Eurasian endemic zone, and help in consideration of surveillance systems and interventions.

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The online version of this article is published within an Open Access environment subject to the conditions of the Creative Commons Attribution license .
Corresponding author
*Corresponding author: Chrono-environment Lab, University of Franche-Comté, place Leclerc, F-25030 Besançon, France. Tel: +33 381 665 745. Fax: +33 381 665 797. E-mail: patrick.giraudoux@univ-fcomte.fr
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