Health and disease control in Danish organic dairy herds

affection podale agriculture biologique animal health bovin laitier bovine mastitis cetose cetosis control de enfermedades control de nematodos dairy cattle danemark data analysis denmark dinamarca disease control disease surveillance enfermedades de los pies foot diseases ganado ganado de leche infecciones por nematodos ketosis lait leche livestock mammite bovine milk nematode control nematode infections organic farming sanidad animal vigilancia de enfermedades