Fig. 2

The concurrent immunization of GTP and PPR vaccines inhibits the immune effect of the GTP vaccine. a The experimental sheep were vaccinated on 7d, 21d, and 28d to collect animal blood samples, centrifuge the blood at 4000 rpm for 8 min, and separate the serum samples. The Inderict ELISA Kit for Detecting Antibodies of Capripox was used to detect the antibody level of GTP vaccine in group B (GTP vaccine single vaccination, green mark) and group C (GTP vaccine and PPR vaccine co-vaccination, purple mark). Details of the groups are as in Table 1, "–" means Calculate Critical (cut off). b Calculate the positive rate of GTP vaccine by detecting the results of the OD₄₅₀ value of the antibody produced by the GTP vaccine after the animal vaccination in groups B and C. The green mark is the GTP vaccine positive rate in the GTP vaccine single vaccination group, and the purple mark is the GTP vaccine positive rate in the GTP vaccine and PPR vaccine co-vaccination group