Ers mis Hydref y llynedd, sefydlwyd Ardaloedd TB Isel, Canolradd ac Uchel yng Nghymru wedi ei seilio ar nifer yr achosion o TB. Lluniwyd y dull hwn o weithredu er mwyn diogelu buchesi mewn ardal TB Isel, er mwyn ceisio lleihau nifer yr achosion yn yr Ardaloedd TB Canolradd ac Uchel.
From October last year, Low, Intermediate and High TB Areas were established in Wales, based on bovine TB incidence. This approach has been designed to protect cattle herds in the Low TB Area whilst driving down the disease in the Intermediate and High TB Areas.