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FMDV O1 subtype undergoes antigenic variation under diverse growth conditions. Of particular interest is the amino acid variation observed at position 56 within the structural protein VP3. Selective pressures influence whether histidine (H) or arginine (R) is present at this position, ultimately influencing in vitro plaque morphology and in vivo pathogenesis in cattle. Using reverse genetics techniques,...
We have previously demonstrated that swine vaccinated with one dose of a replication-defective human adenovirus type 5 (Ad5) vector containing the capsid and 3C proteinase coding regions of foot-and-mouth disease virus (FMDV) were protected when challenged 7 days later with homologous virus. In the current study, we have extended this approach to cattle, the most economically important animals susceptible...
Picornavirus infection induces the proliferation and rearrangement of intracellular membranes in response to the synthesis of nonstructural proteins, including 3A. We have previously shown that changes in 3A are associated with the inability of a Taiwanese strain of foot-and-mouth disease virus (FMDV) (OTai) to grow in bovine cells and cause disease in cattle, although the virus grows to high titers...
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