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- W2994392721 abstract "Since 2011, to control the spread of pseudorabies (PR), US7/US8/UL23-deleted recombinant PRV (rPRV) vaccines based on current variants have been developed. The vaccines can provide effective immune protection to pigs, but fur-bearing animals, such as dogs, foxes, and minks, are increasingly infected by PRV due to consuming contaminated raw meat or offal from immunized pigs. It is suspected that the attenuated PRV vaccine strain is not safe for these fur-bearing animals. To confirm this, we construct a US7/US8/UL23-deleted and a US7/US8/UL23/US3-deleted rPRV based on PRV GL isolated from fox using the CRISPR/Cas9 method. Growth kinetics in vitro and pathogenicity in dogs were compared between the wild type and both rPRVs. The results showed that the growth kinetics of wild-type PRV and US7/US8/UL23-deleted rPRV were faster than those of US7/US8/UL23/US3-deleted recombinant PRV from 24 h to 48 h post infection. Moreover, PRV GL- and rPRVdelUS7/US8/UL23-infected cells formed cell-cell fusion, but the rPRVdelUS7/US8/UL23/US3-infected cells did not. Dogs challenged with wild-type PRV or US7/US8/UL23-deleted rPRV showed obvious nervous symptoms, and all the dogs died, but the group challenged with the US7/US8/UL23/US3-deleted rPRV did not show any nervous symptoms, and all the dogs survived for the duration of the experiment. Tissue viral load analyses also showed that the virulence of the US7/US8/UL23/US3-deleted rPRV was significantly reduced in dogs. This study provides evidence that the US7/US8/UL23-deleted rPRV variant still exhibits high virulence for dogs and also highlights the role of the US3 gene in the pathogenicity of PRV in dogs and provides a strategy for developing a safer vaccine." @default.
- W2994392721 created "2019-12-13" @default.
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- W2994392721 date "2020-01-01" @default.
- W2994392721 modified "2023-10-16" @default.
- W2994392721 title "Construction of a US7/US8/UL23/US3-deleted recombinant pseudorabies virus and evaluation of its pathogenicity in dogs" @default.
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- W2994392721 doi "https://doi.org/10.1016/j.vetmic.2019.108543" @default.
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