| [the occurrence of bvd virus infections in lower austrian dairy farms]. | bulk tank milk samples from 5,024 dairy herds in lower austria were tested by elisa for antibodies to bovine virus diarrhoea virus (bvdv). approximately 54 per cent of the herds had a low level of bulk tank antibody unsuspected of recent infection with bvdv. in 512 herds, which had a high level of bulk tank antibody suggestive of recent infection with bvdv, milk samples from 5-10 primiparous cows, respectively were tested by elisa for antibodies to bvdv. in 287 (56.1%) of these 512 herds only an ... | 1998 | 9793236 |
| control of bvdv-infection on common grassland--the key for successful bvdv-eradication in lower austria. | a bovine viral diarrhea/mucosal disease (bvd/md) control and eradication program was introduced in lower austria in 1996, according to the swedish model. at present 9800 out of 17,000 herds are part of this program. an important risk factor for bvdv-transmission under local conditions is communal grazing. approximately 3-4% of livestock share common pastures, in which susceptible pregnant cattle may be mixed with unrecognised persistently infected (pi) animals. rules and regulations were defined ... | 2005 | 16213041 |
| prevalence of antibodies to pestiviruses in goats in austria. | serological investigations were carried out to determine the prevalence of pestiviral infections in goats in austria, and to investigate the possible relations to herd management practices. the prevalence of antibodies to pestiviruses was investigated in 549 goats in 80 flocks from four regions of austria. the examination for antibodies was performed using an indirect enzyme-linked immunosorbent assay detecting antibodies to the border disease virus (bdv) and bovine viral diarrhoea virus (bvdv). ... | 2006 | 16460357 |
| voluntary and compulsory eradication of bovine viral diarrhoea virus in lower austria. | a voluntary bvdv eradication program without vaccination was introduced in austria in 1997, according to the swedish model employing herd-level antibody tests. since this time, identified persistently infected (pi) animals have to be slaughtered. in order to protect non-infected herds, the major routes of introduction of bvdv infection into a herd, such as communal grazing and livestock trade, have to be controlled. in 1998 pi animals were identified in 7.5% of affiliated herds of herd book bree ... | 2010 | 19931989 |