Potential impact of climate change on schistosomiasis transmission in China

Xiao-nong Zhou, Guo-Jing Yang, Kun Yang, Xian-hong Wang, Qing-Biao Hong, Le-Ping Sun, John B Malone, Thomas K Kristensen, N. Robert Bergquist, Jurg Utzinger

    Research output: Contribution to journalArticlepeer-review


    Appraisal of the present and future impact of climate change and climate variability on the transmission of infectious diseases is a complex but pressing public health issue. We developed a biology-driven model to assess the potential impact of rising temperature on the transmission of schistosomiasis in China. We found a temperature threshold of 15.4�C for development of Schistosoma japonicum within the intermediate host snail (i.e., Oncomelania hupensis), and a temperature of 5.8�C at which half the snail sample investigated was in hibernation. Historical data suggest that the occurrence of O. hupensis is restricted to areas where the mean January temperature is above 0�C. The combination of these temperature thresholds, together with our own predicted temperature increases in China of 0.9�C in 2030 and 1.6�C in 2050 facilitated predictive risk mapping. We forecast an expansion of schistosomiasis transmission into currently non-endemic areas in the north, with an additional risk area of 783,883 km2 by 2050, translating to 8.1% of the surface area of China. Our results call for rigorous monitoring and surveillance of schistosomiasis in a future warmer China. Copyright � 2008 by The American Society of Tropical Medicine and Hygiene.
    Original languageEnglish
    Pages (from-to)188-194
    Number of pages7
    JournalAmerican Journal of Tropical Medicine and Hygiene
    Issue number2
    Publication statusPublished - 2008


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