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Spatial-Temporal Variation and Primary Ecological Drivers of Anopheles sinensis Human Biting Rates in Malaria Epidemic-Prone Regions of China

Author

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  • Zhoupeng Ren
  • Duoquan Wang
  • Jimee Hwang
  • Adam Bennett
  • Hugh J W Sturrock
  • Aimin Ma
  • Jixia Huang
  • Zhigui Xia
  • Xinyu Feng
  • Jinfeng Wang

Abstract

Background: Robust malaria vector surveillance is essential for optimally selecting and targeting vector control measures. Sixty-two vector surveillance sites were established between 2005 and 2008 by the national malaria surveillance program in China to measure Anopheles sinensis human biting rates. Using these data to determine the primary ecological drivers of malaria vector human biting rates in malaria epidemic-prone regions of China will allow better targeting of vector control resources in space and time as the country aims to eliminate malaria. Methods: We analyzed data from 62 malaria surveillance sentinel sites from 2005 to 2008. Linear mixed effects models were used to identify the primary ecological drivers for Anopheles sinensis human biting rates as well as to explore the spatial-temporal variation of relevant factors at surveillance sites throughout China. Results: Minimum semimonthly temperature (β = 2.99; 95% confidence interval (CI) 2.07- 3.92), enhanced vegetation index (β =1.07; 95% CI 0.11–2.03), and paddy index (the percentage of rice paddy field in the total cultivated land area of each site) (β = 0.86; 95% CI 0.17–1.56) were associated with greater An. Sinensis human biting rates, while increasing distance to the nearest river was associated with lower An. Sinensis human biting rates (β = −1.47; 95% CI −2.88, −0.06). The temporal variation (σ t 0 2=1.35) in biting rates was much larger than the spatial variation (σ s 0 2=0.83), with 19.3% of temporal variation attributable to differences in minimum temperature and enhanced vegetation index and 16.9% of spatial variance due to distance to the nearest river and the paddy index. Discussion: Substantial spatial-temporal variation in An. Sinensis human biting rates exists in malaria epidemic-prone regions of China, with minimum temperature and enhanced vegetation index accounting for the greatest proportion of temporal variation and distance to nearest river and paddy index accounting for the greatest proportion of spatial variation amongst observed ecological drivers. Conclusions: Targeted vector control measures based on these findings can support the ongoing malaria elimination efforts in China more effectively.

Suggested Citation

  • Zhoupeng Ren & Duoquan Wang & Jimee Hwang & Adam Bennett & Hugh J W Sturrock & Aimin Ma & Jixia Huang & Zhigui Xia & Xinyu Feng & Jinfeng Wang, 2015. "Spatial-Temporal Variation and Primary Ecological Drivers of Anopheles sinensis Human Biting Rates in Malaria Epidemic-Prone Regions of China," PLOS ONE, Public Library of Science, vol. 10(1), pages 1-17, January.
    • Handle: RePEc:plo:pone00:0116932
    DOI: 10.1371/journal.pone.0116932
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    1. Sehyeong Kim & Youngho Kim, 2019. "Spatially Filtered Multilevel Analysis on Spatial Determinants for Malaria Occurrence in Korea," IJERPH, MDPI, vol. 16(7), pages 1-11, April.
    2. Jennifer L Smith & Davis Mumbengegwi & Erastus Haindongo & Carmen Cueto & Kathryn W Roberts & Roly Gosling & Petrina Uusiku & Immo Kleinschmidt & Adam Bennett & Hugh J Sturrock, 2021. "Malaria risk factors in northern Namibia: The importance of occupation, age and mobility in characterizing high-risk populations," PLOS ONE, Public Library of Science, vol. 16(6), pages 1-23, June.

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