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The performance of the birds in the different experimental groups; effect of vaccination on the body weight gain in different pathogenic challenges. Mycoplasma gallicepticum (MG), Mycoplasma synoviae (MS), Salmonella enterica serovar Typhimurium (ST), Salmonella enterica serovar Enteritidis (SE), and Salmonella enterica serovar Kentucky (SK). Data are expressed as mean ± SEM. Bars without shared letters indicate a significant difference between them (P-value < 0.05) (n = 5).
