A TB breakdown is when a herd loses its officially TB free (OTF) status due to bovine TB being suspected or confirmed. To find out more about bovine TB and Mycobacterium bovis, the bacterium that causes it, see our introduction to the disease


Loss of officially TB free (OTF) status

There are several reasons why a herd might lose its OTF status:

Loss of OTF status
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  A herd can also lose its OTF status if TB testing becomes overdue, so it is important to keep up to date with statutory testing. You can find information about TB testing intervals on GOV.UK