Table 1.
Distribution of cows with a 2 Log virus neutralization test titer ≥ 3 by sampling date and age category
| Sampling date | Total number of cows | Number of cows ≥ 1year | Number of cows ≥ 1year with 2 Log VNT titer ≥ 3 | Number of cows < 1 year | Number of cows < 1year with 2 Log VNT titer ≥ 3 |
|---|---|---|---|---|---|
| 19 Apr 2012 |
108 |
87 |
87 (100%) |
21 |
17 (81%) |
| 17 Sept 2012 |
108 |
89 |
89 (100%) |
19 |
19 (100%) |
| 9 Dec 2012 |
110 |
89 |
88 (99%) |
21 |
16 (76%) |
| 23 Apr 2013 |
116 |
86 |
84 (98%) |
30 |
15 (50%) |
| 23 Sept 2013 | 109 | 87 | 70 (80%) | 22 | 2 (9%) |