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Gene expression and antibody response in chicken against Salmonella Typhimurium challenge

Mashooq Ahmad Dar, Uneeb Urwat, Syed Mudasir Ahmad, Raashid Ahmad, Zahid Amin Kashoo, Tanveer Ali Dar, Shakil Ahmad Bhat, Peerzada Tajamul Mumtaz, Nadeem Shabir, Riaz Ahmad Shah, Mohammad Heidari
Poultry science 2019 v.98 no.5 pp. 2008-2013
Salmonella Typhimurium, antibody formation, broiler chickens, gastrointestinal diseases, gene expression, genes, immunoglobulin G, immunoglobulin M, interferon-gamma, interleukin-12, interleukin-18, intestines, messenger RNA, pathogens, polymerase chain reaction, poultry diseases, vaccination, vaccines
Salmonella enterica serovar Typhimurium (S. Typhimurium) is a primary avian pathogen responsible for severe intestinal pathology in younger chickens and economic losses to poultry industry. Furthermore, S. Typhimurium is also able to cause infection in humans, characterized by acute gastrointestinal disease. A study was conducted to investigate antibody response and expression kinetics of interferon gamma (IFNγ), interleukin (IL-12, and IL-18) genes in broiler chicken at 0, 1, 3, 5, 7, 9, 11, 13, and 15 D post infection following experimental infection of S. Typhimurium. Immunological studies showed higher titres of IgG and IgM in the infected group as compared to the age-matched un-infected control group. The Real-Time PCR-based gene expression analysis revealed significant increase of IFNγ, IL-12, and IL-18 mRNA levels in the infected group as compared to their respective controls (P < 0.05). The present study shall help in understanding the immune responses in birds, thus allowing development of more effective vaccines and vaccination strategies.