We have made steady progress since 2009, with fewer affected herds and new incidents, but we know there have been challenging levels of infection in Pembrokeshire.
Rydym wedi gwneud cynnydd cyson ers 2009, gyda llai o fuchesi wedi'u heffeithio a llai o achosion newydd, ond gwyddom fod lefelau heriol o’r haint wedi bod yn Sir Benfro.