Journal
MATHEMATICAL BIOSCIENCES
Volume 299, Issue -, Pages 85-96Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.mbs.2018.03.008
Keywords
Echinococcosis; Disposing stray dogs; Dynamic model; Basic reproduction number; Risk index
Categories
Funding
- National Natural Science Foundation of P. R. China [11671072, 11271065]
- Research Fund for Chair Professors of Changbai Mountain Scholars Program of Jilin Province [2013039]
- China Animal Health and Epidemiology Center
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Echinococcosis has been recognized as one of the most important helminth zoonosis in China. Available models always consider dogs as the mainly definitive hosts. However, such models ignore the distinctions between domestic dogs and stray dogs. In this study, we propose a 10-dimensional dynamic model distinguishing stray dogs from domestic dogs to explore the special role of stray dogs and potential effects of disposing stray dogs on the transmission of Echinococcosis. The basic reproduction number Ro, which measures the impact of both domestic dogs and stray dogs on the transmission, is determined to characterize the transmission dynamics. Global dynamic analysis of the model reveals that, without disposing the stray dogs, the Echinococcosis becomes endemic even the domestic dogs are controlled. Moreover, due to the difficulties in estimating the parameters involved in Ro with real data and the limitation of Ro in real-world applications, a new risk assessment tool called relative risk index I-risk is defined for the control of zoonotic diseases, and the studies of the risk assessment for Echinococcosis infection show that it is essential to distinguish stray dogs from domestic dogs in applications.
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