A reactive systemic amyloidosis with fibrosis in a Vigova duck : A case report Nair Athira P., Krishna Dhanush B.*, Pradeep M., Palekkodan Hamza, Madhanraj N.1, Rajasekhar R.1, Anoopraj R., George Ajith Jacob 1Department of Veterinary Microbiology, College of Veterinary and Animal Sciences, Kerala Veterinary and Animal Sciences University, Pookode-673 576, Kerala Department of Veterinary Pathology, College of Veterinary and Animal Sciences, Kerala Veterinary and Animal Sciences University, Pookode-673 576, Kerala *Address for Correspondence Dhanush B. Krishna, Assistant Professor, Department of Veterinary Pathology, College of Veterinary and Animal Sciences, Kerala Veterinary and Animal Sciences University, Pookode-673 576, Kerala, India, E-mail: dhanush@kvasu.ac.in
Online Published on 27 March, 2024. Abstract A 2-year-old female Vigova duck weighing 3.2 kg was presented to the Department of Veterinary Pathology for a postmortem with an enlarged abdomen and swelling of the plantar aspect of the feet. Gross examination revealed a severely enlarged pale pink liver weighing 440 g, occupying almost the entire length of the abdominal cavity. Microscopically, the liver revealed extensive deposition of homogenous, eosinophilic material in the hepatic parenchyma, replacing the hepatocytes, along with infiltration of mononuclear cells. The homogenous, eosinophilic materials filled and expanded the interstitium of the spleen, kidney, intestine, and ovary, in addition to the liver. The homogenous, eosinophilic material was confirmed to be amyloid with Congo red stain. Further, Masson's trichrome staining revealed the presence of fibrosis along with amyloid deposition. Culture from the necrosed region of the foot revealed bunches of Gram-positive cocci, indicating Staphylococcus organism. Based on gross, histopathological, and microbiological examination, the present case was diagnosed as systemic amyloidosis with fibrosis secondary to ulcerative pododermatitis in a Vigova duck. Top Keywords Congo red, Duck, Masson's trichrome, Pododermatitis, Staphylococcus. Top |