meat packers and slaughterhouse workers -- keyword, mesh

keywords
(meat-pack* OR meatpack* OR "meat packing" OR "meat packer" OR "meat packers" OR slaughterhouse* OR abbatoir* OR abatoir* OR abbattoir* OR abattoir*)

Consider ORing in "poultry processing" and other similar terms.

MeSH:
("Abattoirs "[mesh] OR "Meat-Packing Industry"[Mesh] )