PATHOLOGICAL STUDIES OF ENTERO-HEPATIC AFFECTIONS IN DUCKS AND SCREENING FOR SPECIFIC VIRAL ETIOLOGY
| dc.contributor.advisor | M., Pradeep | |
| dc.contributor.author | SANJAY RAO, NIKHIL | |
| dc.date.accessioned | 2021-01-04T09:29:10Z | |
| dc.date.available | 2021-01-04T09:29:10Z | |
| dc.date.issued | 2019-10-03 | |
| dc.description.abstract | Duck production holds an important position in the Indian poultry scenario, being the second most domesticated species of poultry in the country after chicken. Ducks are reared for both meat and egg production and a healthy liver and intestine capacitate the bird for its best performance and help the farmers for better profitability. Reports on systematic studies on the liver and intestinal lesions of ducks are scanty in India or have only been studied in relation to particular disease aetiology. Even though ducks show less susceptibility to diseases compared to the chicken, a few infectious and non-infectious diseases that affects liver and intestine were reported in ducks from many duck rearing countries. Among the viral diseases, the most important infections reported are duck enteritis virus (DEV) and duck virus hepatitis (DVH). Duck virus hepatitis (DVH) is an acute and contagious disease affecting liver but so far has not been reported in India. The present study was aimed at systematic post mortem recording of gross and histopathological lesions in the liver and intestine of duck carcasses and screening for DVH viruses and DEV by Polymerase chain reaction (PCR) using species specific primers. A total of 112 duck carcasses were examined in the study. Liver showed enlargement with characteristic deep yellow discoloration and firmness in 43.75 per cent cases. Pale yellow or dark brown friable liver recorded in 21.43 per cent cases. Amyloidosis of varying degrees were observed in 61.61 per cent cases of duck livers examined. A correlation between the severity of amyloidosis and gross lesions could also be derived. The enlarged, yellow and firm liver was observed to have moderate to severe amyloidosis histologically, while pale pink liver had moderate amyloidosis. The intestine also showed amyloid deposits in such cases without appreciable gross lesions. Ducks farmed under intensive system of rearing had a higher incidence of amyloidosis particularly in White Pekin ducks. Friable consistency of liver was either due to severe congestion or fatty change. Hepatocellular carcinoma with cirrhosis was identified in one case. DVE and DHV were not detected in any of the cases. Further screening for DVH viruses in a larger population of ducks is warranted. The absence of DEV in the current study may be due to effective control of the disease through appropriate vaccination strategies. The high incidence of amyloidosis in this study and the possible risk of dietary consumption of amyloid livers and its zoonotic potential needs to be investigated. | en_US |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810158654 | |
| dc.keywords | DUCK, LESIONS OF LIVER, LESIONS OF INTESTINE, DUCK HEPATITIS A VIRUS (DHAV), DUCK ASTROVIRUS (DAstV), DUCK ENTERITIS VIRUS (DEV) , | en_US |
| dc.language.iso | English | en_US |
| dc.pages | 65 | en_US |
| dc.publisher | COLLEGE OF VETERINARY AND ANIMAL SCIENCES, POOKODE WAYANAD | en_US |
| dc.research.problem | ENTERO-HEPATIC AFFECTIONS IN DUCKS AND SCREENING FOR SPECIFIC VIRAL ETIOLOGY | en_US |
| dc.sub | Veterinary Pathology | en_US |
| dc.theme | PATHOLOGICAL STUDIES OF ENTERO-HEPATIC AFFECTIONS IN DUCKS AND SCREENING FOR SPECIFIC VIRAL ETIOLOGY | en_US |
| dc.these.type | M.V.Sc. | en_US |
| dc.title | PATHOLOGICAL STUDIES OF ENTERO-HEPATIC AFFECTIONS IN DUCKS AND SCREENING FOR SPECIFIC VIRAL ETIOLOGY | en_US |
| dc.type | Thesis | en_US |