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    A stochastic model for transmission, extinction and outbreak of Escherichia coli O157:H7 in cattle as affected by ambient temperature and cleaning practices

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    Type
    Article
    Authors
    Wang, Xueying
    Gautam, Raju
    Pinedo, Pablo J.
    Allen, Linda J. S.
    Ivanek, Renata
    KAUST Grant Number
    KUS-C1-016-04
    Date
    2013-07-18
    Online Publication Date
    2013-07-18
    Print Publication Date
    2014-08
    Permanent link to this record
    http://hdl.handle.net/10754/597413
    
    Metadata
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    Abstract
    Many infectious agents transmitting through a contaminated environment are able to persist in the environment depending on the temperature and sanitation determined rates of their replication and clearance, respectively. There is a need to elucidate the effect of these factors on the infection transmission dynamics in terms of infection outbreaks and extinction while accounting for the random nature of the process. Also, it is important to distinguish between the true and apparent extinction, where the former means pathogen extinction in both the host and the environment while the latter means extinction only in the host population. This study proposes a stochastic-differential equation model as an approximation to a Markov jump process model, using Escherichia coli O157:H7 in cattle as a model system. In the model, the host population infection dynamics are described using the standard susceptible-infected-susceptible framework, and the E. coli O157:H7 population in the environment is represented by an additional variable. The backward Kolmogorov equations that determine the probability distribution and the expectation of the first passage time are provided in a general setting. The outbreak and apparent extinction of infection are investigated by numerically solving the Kolmogorov equations for the probability density function of the associated process and the expectation of the associated stopping time. The results provide insight into E. coli O157:H7 transmission and apparent extinction, and suggest ways for controlling the spread of infection in a cattle herd. Specifically, this study highlights the importance of ambient temperature and sanitation, especially during summer. © 2013 Springer-Verlag Berlin Heidelberg.
    Citation
    Wang X, Gautam R, Pinedo PJ, Allen LJS, Ivanek R (2013) A stochastic model for transmission, extinction and outbreak of Escherichia coli O157:H7 in cattle as affected by ambient temperature and cleaning practices. Journal of Mathematical Biology 69: 501–532. Available: http://dx.doi.org/10.1007/s00285-013-0707-1.
    Sponsors
    We thank three anonymous referees and the editor for their suggestions that improved this paper. This work was supported by the National Science Foundation grant NSF-EF-0913367 to RI funded under the American Recovery and Reinvestment Act of 2009. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. This publication is based in part on work supported by Award No. KUS-C1-016-04, made by King Abdullah University of Science and Technology (KAUST).
    Publisher
    Springer Nature
    Journal
    Journal of Mathematical Biology
    DOI
    10.1007/s00285-013-0707-1
    PubMed ID
    23864122
    ae974a485f413a2113503eed53cd6c53
    10.1007/s00285-013-0707-1
    Scopus Count
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