English: new incident
Welsh: achos newydd
Subject: Amaeth
Welsh definition: The number of Officially Tuberculosis Free (OTF) herds in which at least one reactor, inconclusive reactor (IR) taken as a reactor or a culture positive slaughterhouse case has been found in the quarter.
Plural: achosion newydd
Notes: Term ar gyfer y Dangosfwrdd bTB yn benodol.