Programme Results

The Table below shows full year results for each year from 2013 to 2024, plus results for 2025 to the date/week shown. The corresponding 2024 and 2025 data of the same week is also shown for comparison.

	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024	2024 – Week 25	2025 – Week 25
Animal-level
Calves Tested	2,095,695	2,131,748	2,264,508	2,324,853	2,347,115	2,346,955	2,345,654	2,382,142	2,430,274	2,434,342	2,386,629	2,325,436	1,928,288	1,881,422
% Negative	98.03%	98.54%	98.85%	99.20%	98.85%	98.58%	98.96%	99.10%	99.21%	98.90%	98.98%	99.07%	99.09%	99.20%
% (Number) Positive*	0.77% (16,191)	0.50% (10,758)	0.36% (8,246)	0.20% (4,540)	0.12% (2,841)	0.07% (1,531)	0.05% (1,111)	0.03% (807)	0.03% (810)	0.03% (750)	0.03% (701)	0.02% (485)	0.02% (323)	0.03% (476)
% (Number) Inconclusive*	0.03% (661)	0.01% (119)	0.01% (207)	0.00% (59)	0.01% (118)	0.00% (47)	0.00% (15)	0.00% (15)	0.00% (5)	0.00% (6)	0.00% (9)	0.00% (2)	0.00% (1)	0.00% (4)
% (Number) Empty	1.13% (23,750)	0.92% (19,675)	0.73% (16,632)	0.59% (13,717)	1.01% (23,711)	1.33% (31,114)	0.94% (22,080)	0.82% (19,420)	0.73% (17,703)	1.05% (25,455)	0.98% (23,435)	0.85% (19,743)	0.83% (15,967)	0.76% (14,227)
% (Number) BVD+**	0.66% (13,877)	0.46% (9,733)	0.33% (7,427)	0.16% (3,808)	0.10% (2,397)	0.06% (1,325)	0.04% (987)	0.03% (724)	0.03% (788)	0.03% (707)	0.03% (625)	0.02% (444)	0.02% (292)	0.02% (416)
% (Number) BVD+** recorded dead	0.66% (13,876)	0.46% (9,733)	0.33% (7,427)	0.16% (3,808)	0.10% (2,397)	0.06% (1,325)	0.04% (987)	0.03% (724)	0.03% (788)	0.03% (707)	0.03% (625)	0.02% (444)	0.01% (265)	0.02% (396)
Herd-level
% (Number) of BVD+ herds	10.20% (8,218)	7.20% (5,711)	5.46% (4,287)	2.86% (2,211)	1.73% (1,307)	1.00% (742)	0.70% (505)	0.54% (380)	0.53% (372)	0.45% (306)	0.40% (264)	0.32% (202)	0.25% (139)	0.29% (155)
% (Number) of herds retaining one or more BVD+ calves born in stated year *	0.00% (0)	0.00% (0)	0.00% (0)	0.00% (0)	0.00% (0)	0.00% (0)	0.00% (0)	0.00% (0)	0.00% (0)	0.00% (0)	0.00% (0)	0.00% (0)	0.02% (9)	0.02% (13)
No. of breeding herds with Negative Herd Status													77525	76,746

*Based on initial tag test result, prior to any confirmatory testing.
**Calves with an initial positive or inconclusive result without a negative retest result.
*** BVD+ calves are retained when alive for more than 7 weeks (2013-2016) or 5 weeks (2017 and 2018) or 3 weeks (2019 – to date) after the date of the first test

BVD Maps

Maps showing distribution of BVD-positive births during each year of the BVD eradication programme. Each hexagon represents an area of approximately 10km². Cells with thick blue borders have low numbers of cattle (e.g. mountainous areas, lakes, rivers, towns, cities).