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Effect of MG infection on body weight and immune organ index in chickens. (a) Body weight gains of chicks before and after MG infection. (b) Organ indexes for spleen, thymus, and bursa in chicks. (c) body weight of chicken embryos after 3–11 days of MG infection; spleen, thymus, and bursal indexes of chicken embryos after 3–11 days of MG infection (d–f). The data are represented as mean ± SD. * p < 0.05; ** p < 0.01; *** p < 0.001, n = 6.
