A Study on the Prevalence of Bovine Viral Diarrhea Virus (BVDV) in Feedlot and Dairy Farms in and Adound Adama,East Shoa Zone, Ethiopia
| dc.contributor.advisor | Kyule, Mosses N. | |
| dc.contributor.author | Belay, Kumilachew | |
| dc.date.accessioned | 2022-06-23T08:27:03Z | |
| dc.date.accessioned | 2023-11-30T12:48:42Z | |
| dc.date.available | 2022-06-23T08:27:03Z | |
| dc.date.available | 2023-11-30T12:48:42Z | |
| dc.date.issued | 2009-06 | |
| dc.description.abstract | A cross sectional study to assess BVDV prevalence and determine the risk factors and to compare the ELISA diagnostic results of milk and serum values in 40 feedlot and 60 dairy farms was carried out in Adama area, East Shoa Zone. Herds were visited to ascertain information on the management system, possibility of contact with other species of domestic animals, introduction of new animal into the herd and to collect serum samples from feedlot and matched milk and serum samples from dairy herds. Commercial indirect ELISA-kit for the detection of specific antibodies to BVDV was used. According to this study, the apparent individual and herd seroprevalence of BVDV was 3S.9 % and 70.9 %, respectively. The individual and herd seropositivity difference among the two production systems was not significant (p>O.OS). There was a significant difference; however, in the prevalence of the different age groups (p<O.OS) of the studied animals. Management was found to significantly (p>O.OS) affect the antibody prevalence where 88.9% of the extensive and 7S.S % of the semi intensive herds had at least one seroreactor. Although a significant difference (p<O.OS) in herd positivity was observed with respect to herd size, introduction of new animal to the herd and contact with other species of animals in the univariate analysis, only herd size (p<0.01) was found to significantly affect herd . positivity in the multivariate analysis. The overall individual milk prevalence was 17.1%. The reliability of using individual milk ELISA results as a diagnostic tool for BVDV prevalence was evaluated. The correlation between milk and serum ELISA was moderate (r=0.473, p=O.OOO) and the test agreement between milk ELISA and serum ELISA also indicated a moderate level of agreement (kappa=0.409, p=O.OOO). In conclusion, exposure to BVDV was widely distributed in feedlot and dairy farms in and around Adama. , the overall situation of BVDV and its economic impact in Ethiopia should be well studied and documented. Further studies on the identification of Persistently Infected (PI) animals and validation of milk ELISA tests were recommended. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/123456789/32132 | |
| dc.language.iso | en | en_US |
| dc.publisher | Debre Zeit | en_US |
| dc.subject | BVDV, Dairy, ELISA, Feedlot, Milk, Prevalence, Serum | en_US |
| dc.title | A Study on the Prevalence of Bovine Viral Diarrhea Virus (BVDV) in Feedlot and Dairy Farms in and Adound Adama,East Shoa Zone, Ethiopia | en_US |
| dc.type | Thesis | en_US |