Campylobacter in broiler chickens. The mode of spread in chicken flocks with special reference to food hygiene

abattage d'animaux animal diseases bacteriose bacterioses bacteriosis biological contamination broiler chickens campylobacter campylobacter coli campylobacter jejuni carne de pollo chicken meat contamination biologique disease surveys disease transmission encuestas sanitarias enfermedades de los animales epidemiologia epidemiologie epidemiology higiene de la carne maladie des animaux maladie transmissible par aliment meat hygiene pollo de engorde poulet de chair reservoirs sacrificio serotipos serotypes slaughtering suecia sweden transmission des maladies viande de poulet