Association of humoral response to classical swine fever vaccination with single nucleotide polymorphisms of swine leukocyte antigens

Abstract

In present investigation genetic variability in humoral response to classical swine fever (CSF) vaccination was explored. The aim of the study was to find association of 14 single nucleotide polymorphisms (SNPs) (IL-1β, MX1, IRF3 and SLA genes) with humoral response measured in terms of percentage inhibition of E2 antibody by competitive enzyme-linked immunosorbent assay. The post-vaccination response of CSF vaccination was low to moderate in Desi piglets ranged from 25.29% to 92.23% whereas it was moderate to high in Desi × Landrace piglets ranged from 69.30% to 100%. The response to CSF vaccination was significantly (P < 0.0001) differing in Desi and Desi × Landrace piglets. The mean percentage inhibition in Desi piglets was 62.73% but in Desi × Landrace cross-bred it was 97.24%. None of the SNPs of present investigation was significantly associated with humoral immune response in Desi piglets. Two SNPs namely rs80937718 (SLA DQA1) and rs80929898 (SLA DQA1) were significantly (P < 0.01) affecting the humoral response of CSF vaccination in Desi × Landrace piglets.