In Spain, a biosecurity survey is used by official veterinarians to detect risk factors for entry of Salmonella in broilers, layers, breeders and turkeys: https://www.mapa.gob.es/es/ganaderia/temas/sanidad-animal-higiene-ganadera/pncspollosdeengorde2022_tcm30-441940.pdf pages 7-9, https://www.mapa.gob.es/es/ganaderia/temas/sanidad-animal-higiene-ganadera/pncsponedoras2022_tcm30-441936.pdf : pages 6-8 https://www.mapa.gob.es/es/ganaderia/temas/sanidad-animal-higiene-ganadera/pncsreproductoras2022_tcm30-441938.pdf pages 6-8 https://www.mapa.gob.es/es/ganaderia/temas/sanidad-animal-higiene-ganadera/pncspavos2022_tcm30-441939.pdf pages 6-8 Cecav used this survey model to carry out a comparative study of biosecurity measures in laying hens called Biopon Program.
