Table 2 BTM surveillance and testing of individual sera for antibodies agains BHV-1 in 1990–2003
Year | No of bulk-tank milk samples | No positive | No of individual serum samples | No of new positive | No of serum samples from beef animals | No positive |
|---|---|---|---|---|---|---|
1990 | 9879(a | 3 | 2420 | 0 | - | - |
1991 | 36899 | 1(b | 6224 | 90 | - | - |
1992 | 37923 | 1(b | 7496 | 0 | - | - |
1993 | 34115 | 1(b | 4954 | 0 | 3248 | 0 |
1994 | 34169 | 1(b | 5210 | 0 | 12764 | 0 |
1995 | 32588 | 0 | 3078 | 0 | 2544 | 0 |
1996 | 30569 | 0 | 2343 | 0 | 2839 | 0 |
1997 | 28577 | 0 | 2903 | 0 | 2845 | 0 |
1998 | 26934 | 0 | 2125 | 0 | 2758 | 0 |
1999 | 24872 | 0 | 2296 | 0 | 2920 | 0 |
2000 | 22698 | 0 | 2688 | 0 | 2899 | 0 |
2001 | 21040 | 0 | 2407 | 0 | 2996 | 0 |
2002 | 19870 | 0 | 2021 | 0 | 2816 | 0 |
2003 | 18519 | 0 | 2321 | 0 | 6753 | 0 |