Pathological and Seroprevalence Studies on infectious Bursal Disease in Chickens In and Around Bahir Dar, North west, Ethiopia
| dc.contributor.advisor | Dr. Ashenafi, Hagos | |
| dc.contributor.author | Teshager, Natnael | |
| dc.date.accessioned | 2018-06-29T11:31:25Z | |
| dc.date.accessioned | 2023-11-30T13:17:28Z | |
| dc.date.available | 2018-06-29T11:31:25Z | |
| dc.date.available | 2023-11-30T13:17:28Z | |
| dc.date.issued | 2015-06 | |
| dc.description.abstract | A cross sectional study was conducted from January 2015 to May 2015 to characterize the pathological changes and to determine seroprevalence of IBD and its associated risk factors in chickens in and around Bahir Dar. The clinical signs observed in IBD infected chickens were whitish diarrhea mixed with blood, ruffled feather, and massive death within short period. The necropsy findings were petichial hemorrhage in bursa of fabricius, kidney, thymus, spleen, thigh and pectoral muscles. Bursa of fabricius became edematous in serosa and mucosal part, whitish-creamy and atrophied as the course of the disease progressed. Kidney became pale and ureter was turgid with urate in a numbers of cases. The histopathological changes in this study revealed that edema of bursa of fabricius, formation of cystic follicles, depletion of lymphocytes, fibrosis and follicular architecture lost. Severe, moderate and mild lesion score were observed in bursa of fabricius. Infiltrations of heterophils were noted both in lymphoid and non lymphoid tissues. Depletion of lymphoid cell in germinal center of spleen and total depletion of lymphoid cells were encountered in thymus gland. The kidney tubules were filled by exudates and necrotized cuboidal cells. Sera collected from a total of 320 chickens were subjected to IELISA test and disclosed an overall prevalence of 51.56% (CI: 45.95 – 57.14) in study area. The seroprevalence of IBD among chickens showed a statistically significant difference (P<0.05) among study sites namely Andassa (72.73%), Gombat (50%), Wonjeta (47.69%), Meshenty (44.44%) and Bahir Dar (42.42%). The susceptibility of chickens to IBDV revealed a statistically significant difference (P<0.05) among different breeds where Koekoek was found more prone to IBD infection with seroprevalence of 67.11% followed by Bovans brown (57.69%), local breeds (48.31%), and Bovans white (40.28%). The seroprevalence of IBD was also significantly associated (P<0.05) with the age of chickens and among farm systems. These studies clearly indicated that IBD infection is a common and wide spread problem affecting a number of chicken breeds under different management systems and hence an urgent control intervention should be in place. Keywords: Age, Bahir Dar, Breed, Chickens, Histopathology, Lesions, Seroprevalence, sex | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/123456789/5019 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababauniversity | en_US |
| dc.subject | Age | en_US |
| dc.subject | Bahir Dar | en_US |
| dc.subject | Breed | en_US |
| dc.subject | Chickens | en_US |
| dc.subject | Histopathology | en_US |
| dc.subject | Lesions | en_US |
| dc.subject | Seroprevalence | en_US |
| dc.subject | sex | en_US |
| dc.title | Pathological and Seroprevalence Studies on infectious Bursal Disease in Chickens In and Around Bahir Dar, North west, Ethiopia | en_US |
| dc.type | Thesis | en_US |