Author: Klem, T. B.; Tollersrud, T.; Østerås, O.; Stokstad, M.
Title: Association between the level of antibodies in bulk tank milk and bovine respiratory syncytial virus exposure in the herd Document date: 2014_7_12
ID: 0niak4oy_23
Snippet: BRSV infection occurred in the two herds in December 2009 (herd 1) and January 2010 (herd 2). The long-term development of the BTM antibody level in the two herds following the infection is shown in Fig 3. Serological investigation of young animals consistently yielded negative results, indicating that there was no new introduction of BRSV in the study period. BTM from the two herds remained strongly positive for four years after the infection. T.....
Document: BRSV infection occurred in the two herds in December 2009 (herd 1) and January 2010 (herd 2). The long-term development of the BTM antibody level in the two herds following the infection is shown in Fig 3. Serological investigation of young animals consistently yielded negative results, indicating that there was no new introduction of BRSV in the study period. BTM from the two herds remained strongly positive for four years after the infection. The BTM antibody level was high at all samplings, but for both herds, the PP value varied between BTM samples collected only two weeks apart. Both herds had a high increase between the first and second samplings two months apart (94 and 96 PP difference, respectively). Apart from the first sample, the PP value was never below 52 in any of the herds during the four years.
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