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Modeling the environmental suitability for Bacillus anthracis in the Qinghai Lake Basin, China

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Listed:
  • Temitope Emmanuel Arotolu
  • HaoNing Wang
  • JiaNing Lv
  • Kun Shi
  • Hein van Gils
  • LiYa Huang
  • XiaoLong Wang

Abstract

Bacillus anthracis is a gram-positive, rod-shaped and endospore-forming bacterium that causes anthrax, a deadly disease to livestock and, occasionally, to humans. The spores are extremely hardy and may remain viable for many years in soil. Previous studies have identified East Qinghai and neighbouring Gansu in northwest China as a potential source of anthrax infection. This study was carried out to identify conditions and areas in the Qinghai Lake basin that are environmentally suitable for B. anthracis distribution. Anthrax occurrence data from 2005–2016 and environmental variables were spatially modeled by a maximum entropy algorithm to evaluate the contribution of the variables to the distribution of B. anthracis. Principal Component Analysis and Variance Inflation Analysis were adopted to limit the number of environmental variables and minimize multicollinearity. Model performance was evaluated using AUC (area under the curve) ROC (receiver operating characteristics) curves. The three variables that contributed most to the suitability model for B. anthracis are a relatively high annual mean temperature of -2 to 0°C, (53%), soil type classified as; cambisols and kastanozems (35%), and a high human population density of 40 individuals per km2 (12%). The resulting distribution map identifies the permanently inhabited rim of the Qinghai Lake as highly suitable for B. anthracis. Our environmental suitability map and the identified variables provide the nature reserve managers and animal health authorities readily available information to devise both surveillance strategy and control strategy (administration of vaccine to livestock) in B. anthracis suitable regions to abate future epidemics.

Suggested Citation

  • Temitope Emmanuel Arotolu & HaoNing Wang & JiaNing Lv & Kun Shi & Hein van Gils & LiYa Huang & XiaoLong Wang, 2022. "Modeling the environmental suitability for Bacillus anthracis in the Qinghai Lake Basin, China," PLOS ONE, Public Library of Science, vol. 17(10), pages 1-12, October.
  • Handle: RePEc:plo:pone00:0275261
    DOI: 10.1371/journal.pone.0275261
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    References listed on IDEAS

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    1. Timothy P Robinson & G R William Wint & Giulia Conchedda & Thomas P Van Boeckel & Valentina Ercoli & Elisa Palamara & Giuseppina Cinardi & Laura D'Aietti & Simon I Hay & Marius Gilbert, 2014. "Mapping the Global Distribution of Livestock," PLOS ONE, Public Library of Science, vol. 9(5), pages 1-13, May.
    2. repec:plo:pone00:0097122 is not listed on IDEAS
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