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Identification of the Genome Segments of Bluetongue Virus Type 26/Type 1 Reassortants Influencing Horizontal Transmission in a Mouse Model. | LitMetric

AI Article Synopsis

Article Abstract

Bluetongue virus serotypes 1 to 24 are transmitted primarily by infected midges, in which they also replicate. However, "atypical" BTV serotypes (BTV-25, -26, -27 and -28) have recently been identified that do not infect and replicate in adult , or a derived cell line (KC cells). These atypical viruses are transmitted horizontally by direct contact between infected and susceptible hosts (primarily small ruminants) causing only mild clinical signs, although the exact transmission mechanisms involved have yet to be determined. We used reverse genetics to generate a strain of BTV-1 (BTV-1 RG) which is less virulent, infecting IFNAR mice without killing them. Reassortant viruses were also engineered, using the BTV-1 RG genetic backbone, containing individual genome segments derived from BTV-26. These reassortant viruses were used to explore the genetic control of horizontal transmission (HT) in the IFNAR mouse model. Previous studies showed that genome segments 1, 2 and 3 restrict infection of cells, along with a minor role for segment 7. The current study demonstrates that genome segments 2, 5 and 10 of BTV-26 (coding for proteins VP2, NS1 and NS3/NS3a/NS5, respectively) are individually sufficient to promote HT.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8620829PMC
http://dx.doi.org/10.3390/v13112208DOI Listing

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