Histopathology of Internal Organs of Farm Animals Fed Genetically Modified Corn and Soybean Meal

Michał Reichert 1 , Wojciech Kozaczyński 1 , Teresa Agnieszka Karpińska 1 , Łukasz Bocian 2 , Agnieszka Jasik 1 , Anna Kycko 1 , Małgorzata Świątkiewicz 3 , Sylwester Świątkiewicz 3 , Iwona Furgał-Dierżuk 3 , Anna Arczewska-Włosek 3 , Juliusz Strzetelski 3 ,  and Krzysztof Kwiatek 4
  • 1 Department of Pathology, National Veterinary Research Institute, 24-100 Pulawy, Poland
  • 2 Department of Epidemiology and Risk Assessment, National Veterinary Research Institute, 24-100 Pulawy, Poland
  • 3 Department of Animal Nutrition and Feed Science, National Research Institute of Animal Production, 32-083 Balice, Poland
  • 4 Department of Hygiene of Animal Feeding Stuffs, National Veterinary Research Institute, 24-100 Pulawy, Poland


Histopathological examination of liver, kidney, spleen, pancreas, duodenum, jejunum, skeletal muscle, and bursa of Fabricius samples, collected from broiler chickens, laying hens, fattening pigs, and calves fed genetically modified corn MON 810 and soybean meal MON-40-3-2 (Roundup Ready, RR), was performed The examination showed no significant differences between the control animals fed diets containing no genetically modified feeds and animals fed genetically modified feeds. In some cases, congestion of parenchyma and focal lymphoid cell infiltrations were observed in all dietary groups, including controls, and therefore, it was assumed that the lesions were not associated with the feeding transgenic feeds.

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