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DPV-specific mucosal IgG responses were tested by ELISA. Spleens, thymuses, harderian glands, bursas of Fabricius, livers, bile, and lungs were obtained from the vaccinated group at 1, 2, 3, 4, 5, 6, and 8 weeks. The specific IgG in different organs was detected by DPV antigen-capture ELISA.
