Fig. 1

The concurrent immunization with GTP and PPR vaccines enhances the immune effect of the PPR vaccine. a The experimental sheep were vaccinated at 7d, 14d, 21d, and 28d to collect animal blood samples, centrifuge the blood at 4000 rpm for 8 min, and separate the serum samples. Detect PPR vaccine antibody PI values in group A (PPR vaccine single vaccination, red mark) and group C (PPR vaccine and GTP vaccine co-vaccination, blue mark) by Blocking ELISA Kit for Detecting Antibody of PPRV. Details of the groups are as in Table 1, "–" means Calculate Critical (cut off). b Calculate the positive rate of PPR vaccine by detecting the PI value of the antibody produced by the animals in groups A and C after being vaccinated with PPR vaccine. The red mark is the positive rate of PPR vaccine in the PPR vaccine single vaccination group, and the blue mark is the positive rate of PPR vaccine in the PPR vaccine and GTP vaccine co-vaccination group