Mae asesiadau cychwynnol o ffurflenni adrodd y clefyd yn dangos bod o leiaf 70% o’r achosion agored yn Ardal TB Isel y Gogledd ddiwedd Mawrth 2020 yn deillio o symudiadau gwartheg. Nid yw hyn yn golygu nad gwartheg wedi’u prynu oedd achos y 30% arall ond gallai’r achosion hynny fod wedi’u trosglwyddo mewn mwy nag un ffordd. Mae'n destun pryder er gwaethaf y mesurau rheoli sydd gennym ar waith bod y dystiolaeth epidemiolegol hon yn dangos mai gwartheg a brynwyd yw prif ffynhonnell heintiadau newydd yn yr Ardal TB Isel. Rwy’n annog pawb sy'n dod â gwartheg i’r ardal i asesu'n ofalus y risg o brynu’r anifeiliaid hynny drwy brynu’n ddoeth, ac i ddefnyddio offer fel gwefan ibTB. Os ydym am atal y clefyd a chyrraedd ein targedau dileu, mae angen i ni roi blaenoriaeth i ddiogelu Ardal TB Isel y Gogledd.
Preliminary assessment of disease report forms to identify the source of infection has demonstrated at least 70% of the open breakdowns in the LTBA at the end of March 2020 are directly attributable to cattle movements. This does not mean the remaining 30% of breakdowns were not from purchased cattle but these breakdowns may have had more than one likely risk pathway. It is concerning despite the control measures we have in place this epidemiological evidence indicates bought-in cattle being the primary source of new infection in the LTBA. I urge anyone bringing cattle into the LTBA to carefully assess the risk presented by those animals through informed purchasing and to utilise tools such as the ibTB website. If we are to roll back disease and achieve our eradication targets we need to protect the LTBA as a priority.