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Characterization of Atherosclerosis by Histochemical and Immunohistochemical Methods in African Grey Parrots (Psittacus erithacus) and Amazon Parrots (Amazona Spp)

Important Findings The aim of the study was to characterize atherosclerotic changes in African grey parrots and Amazon parrots by histochemical and immunohistochemical methods. The incidence of atherosclerosis in the examined parrots was 91.9% in African grey parrots and 91.4% in Amazon parrots; ‘‘response-to-injury hypothesis’’ seems inapplicable in parrots. In addition, alterations of vitally important organs (heart, lungs) significantly correlated with atherosclerosis of the aorta ascendens.