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Author: ANAGHA A M ×

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    ThesisItemOpen Access
    PATHOLOGY OF CARDIO-PULMONARY AND RENAL AFFECTIONS IN DUCKS AND SCREENING FOR ASSOCIATED VIRUSES
    (COLLEGE OF VETERINARY AND ANIMAL SCIENCES POOKODE, WAYANAD, 2022-02-25) ANAGHA A M; Pradeep M
    The present study entitled “Pathology of cardio-pulmonary and renal affections in ducks and screening for associated viruses focused on systematic recording of gross and histopathological changes in heart lungs and kidneys and screening for MDPV, DAdV-1 and ANV. A detailed post mortem examination of 119 duck carcasses was carried out, gross lesions noted and representative samples were collected from heart, lungs and kidneys for histopathology and molecular screening. Gross lung/airsac lesions were observed in 31.09 per cent carcasses and the lesion varied from cloudy airsacs, nodules in air sacs, congestion, consolidation and nodules in lungs. Microscopically lung showed varying degrees of mononuclear cell infiltration and vascular changes. Gross lesions in heart were observed in 20.16 per cent of duck carcasses and the lesion varied from deposition of white material on pericardium, pale discolouration of cardiac muscles, rounding of heart and ventricular hypertrophy. Microscopic lesions included fibrinous pericarditis, myocardial degeneration, epicardial thickening, myocardial fibrosis, microcapillary dilatation and myocardial hemorrhage. Gross lesions in kidneys were congestion, deposition white material, atrophy and enlargement of kidneys. Microscopic lesions in kidneys were associated with glomeruli, tubules, interstitium and vascular changes. Sclerotic changes in kidneys were graded based on extend of fibrous tissue proliferation in Masson trichrome stained sections.A grading system for chronic changes in kidneys based on Masson trichrome staining was carried out for the first time in birds. Grading of lung inflammatory lesions were also made. Adult ducks reared under intensive system showed more chronic changes compared to ducks reared in backyard system which showed more of acute lesions.
  • Thumbnail Image
    ThesisItemOpen Access
    PATHOLOGY OF CARDIO-PULMONARY AND RENAL AFFECTIONS IN DUCKS AND SCREENING FOR ASSOCIATED VIRUSES
    (COLLEGE OF VETERINARY AND ANIMAL SCIENCES POOKODE, 2022-02-23) ANAGHA A M; Pradeep M
    The present study entitled “Pathology of cardio-pulmonary and renal affections in ducks and screening for associated viruses focused on systematic recording of gross and histopathological changes in heart lungs and kidneys and screening for MDPV, DAdV-1 and ANV. A detailed post mortem examination of 119 duck carcasses was carried out, gross lesions noted and representative samples were collected from heart, lungs and kidneys for histopathology and molecular screening. Gross lung/airsac lesions were observed in 31.09 per cent carcasses and the lesion varied from cloudy airsacs, nodules in air sacs, congestion, consolidation and nodules in lungs. Microscopically lung showed varying degrees of mononuclear cell infiltration and vascular changes. Gross lesions in heart were observed in 20.16 per cent of duck carcasses and the lesion varied from deposition of white material on pericardium, pale discolouration of cardiac muscles, rounding of heart and ventricular hypertrophy. Microscopic lesions included fibrinous pericarditis, myocardial degeneration, epicardial thickening, myocardial fibrosis, microcapillary dilatation and myocardial hemorrhage. Gross lesions in kidneys were congestion, deposition white material, atrophy and enlargement of kidneys. Microscopic lesions in kidneys were associated with glomeruli, tubules, interstitium and vascular changes. Sclerotic changes in kidneys were graded based on extend of fibrous tissue proliferation in Masson trichrome stained sections.A grading system for chronic changes in kidneys based on Masson trichrome staining was carried out for the first time in birds. Grading of lung inflammatory lesions were also made. Adult ducks reared under intensive system showed more chronic changes compared to ducks reared in backyard system which showed more of acute lesions.