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- W1973726913 abstract "Bluetongue is a seasonal midge-borne disease of ruminants with economic consequences on herd productivity and animal trade. Recently, two new modes of transmission have been demonstrated in cattle for Bluetongue virus serotype 8 (BTV8): vertical and pseudo-vertical transmission. Our objective was to model the seasonal spread of BTV8 over several years in a homogeneous population of cattle, and to evaluate the effectiveness of vaccination strategies. We built a deterministic mathematical model accounting for the seasonality in vector abundance and all the modes of transmission. We proposed a counterpart of the basic reproduction number (R0) in a seasonal context (RS). Set A(t) is the number of secondary cases produced by a primary case introduced at time t. RS is the average of A(t). It is a function of midge abundance and vaccination strategy. We also used A⁎, the maximum of A(t), as an indicator of the risk of an epidemic. Without vaccination, the model predicted a large first epidemic peak followed by smaller annual peaks if RS>1. When RS<1, small epidemics could occur if A⁎>1. Vaccination reduced RS and A⁎ to less than one, but almost perfect vaccine efficacy and coverage were required to ensure no epidemics occurred. However, a lower coverage resulting in RS>1 could decrease infection prevalence. A further step would be to optimize vaccination strategies by targeting an appropriate period of the year to implement the vaccination." @default.
- W1973726913 created "2016-06-24" @default.
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- W1973726913 date "2011-12-01" @default.
- W1973726913 modified "2023-10-13" @default.
- W1973726913 title "Seasonal spread and control of Bluetongue in cattle" @default.
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- W1973726913 doi "https://doi.org/10.1016/j.jtbi.2011.08.041" @default.
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