Mae'r Gweinidog Materion Gwledig Lesley Griffiths wedi tynnu sylw at fygythiad byd-eang i iechyd pobl ac anifeiliaid wrth i wythnos ymwybyddiaeth fyd-eang ar y mater ddechrau heddiw.
Rural Affairs Minister Lesley Griffiths has highlighted a global threat to the health of people and animals as a worldwide awareness week on the issue gets underway today.