[Environmental bacterial counts as indicator of contamination in cattle abbattoirs]

abattage d'animaux analisi statistica analyse statistique bacteria biological contamination bovin bovino cattle contaminantes contamination biologique contaminazione biologica control ambiental controllo ambientale environmental control food hygiene ganado bovino higiene de los alimentos igiene degli alimenti inquinanti macellazione polluant pollutants refrigeration refrigerazione sacrificio slaughtering statistical analysis