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Table 1 Distribution of cows with a 2 Log virus neutralization test titer ≥ 3 by sampling date and age category

From: Schmallenberg virus antibody persistence in adult cattle after natural infection and decay of maternal antibodies in calves

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%)