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 2Log VNT titer ≥ 3 | Number of cows < 1 year | Number of cows < 1year with 2Log 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%) |