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Serological response of sheep experimentally infected with (A,B) SPPV-“India/2013/Surankote” and (C,D) SPPV-“Egypt/2018”, respectively. For serological analyses, (A,C) the DA ELISA and (B,D) the SNT were performed. In the ELISA, an S/P% ratio ≥30 was defined positive, and in the SNT, ND50/mL ≥14 was set positive. # displays sheep that were euthanized due to ethical reasons before the end of the study.
