Antigen-specific immune responses in immunized chickens with Salmonella Gallinarum wild type strain (JOL394), JOL914, JOL915, and JOL916: A, SI of lymphocyte sample from the chickens by peripheral lymphocyte proliferation assay using soluble antigen at 10th day post inoculation; B, plasma IgG concentration (μg/mL) by indirect-ELISA at second week post immunization. Error bars indicate the SEM (n = 5). * Immunized chickens showed the significant immune responses compared to the control group that was inoculated with PBS (p < 0.05).