Antibody levels against
FMDV serotypes O and Asia-1 in yaks were detected by a
liquid-phase blocking competitive ELISA (LPB-ELISA)
kit provided by the Lanzhou Veterinary Research
Institute, China (LZY-14-0218), according to the
manufacturer’s instruction. Briefly, sera to be tested were
diluted with phosphate-buffered saline (PBS) in a gradient
from 1:4-1:512