Mr. Michael Sheahan:

I will come to that in a moment. I will just finish my point on the blood test. The reason we do not use the blood test widely on the 6 million cattle in the national herd is because the false positive rate is too high to use it as a screening test. We are now using it in all significant breakdowns. The sensitivity is 97%. The false positive rate is 3%. With the skin test the false positive rate is tiny. About one in 5,000 reactors is a false positive with the skin test. It is very specific. There are very few false positives. If 5,000 are tested and there are 5,000 reactors, only one will be a false positive. This is an important point. The ability of the skin test to pick out infected animals is only 80%. If there are 100 animals with TB in a pen, the skin test will pick up 80. That is pretty good as tests go. There is no test for any disease that will pick out 100% in humans or animals so 80% is relatively good.