Histopathological and Pathological Features of Bacterial Infection in Agama Lizards Found Around Poultry Houses

Olufisoye O. Ojo (), Buzu B. Shedrack (), Idopise G. Edward () and James S. Sambo ()

European Journal of Animal Health, 2023, vol. 4, issue 1, 30 - 38

Abstract: Purpose: Histopathological examination of the liver of the lizard (Agama Agama) is useful for assessing propensity for ecological and environmental disease. Materials and Methods: 100 free-roaming lizards were captured around poultry houses and histopathological examination of liver lesions after bacterial infection. Culture of liver samples revealed the presence of Staphylococcus aureus and Corynebacterium species. Macroscopically, the liver appears pale. Liver tissue blocks were fixed, stained with hematoxylin and eosin stains, and viewed on a BH2 Olympus® microscope at 200x and 400x magnification. Photomicrographs were then taken. Findings: Microscopically, the liver parenchyma consists of normal hepatocytes arranged in chains around blood vessels and separated by narrow, clear subendothelial spaces. Histopathological examination of selected liver tissues showed that melanin-loaded melano-macrophages were distributed within the tissue. Other histopathologic features observed include in the liver tissues include; hepatocyte necrosis, severe hepatocyte vacuolization and associated melano-macrophage hypertrophy, congested blood vessels, mononuclear cell infiltration and melano-macrophage hyperplasia. Implications to Theory, Practice and Policy: The results of this study provide insight into the histopathological picture of bacteria-infected lizards in Zaria, Nigeria, and serve as a guide for clinical manifestations and knowledge about future research on lizard livers.

Keywords: Histopathology; Liver; Melano-Macrophages; Infection; Agama Lizard (search for similar items in EconPapers)
Date: 2023
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