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Cortical renal cells from proximal convoluted tubules from (A) broiler chicken in the experimental group 3 days after cessation of exposure to 3 mg citrinin (CIT)/kg feed during 21 days; (B) laying hen in the experimental group 3 days after cessation of exposure to 3.5 mg CIT/kg feed during 21 days. Note degenerated mitochondria in (A), implying recovery from oxidative stress, and the high number of degenerated mitochondria in (B). Magnification: 2500×. Scale bars: 2 µm.
