[Disease prophylaxis and consumer protection with special regard to alternative husbandry systems]

animal health animal welfare bacteriose bacterioses bacteriosis bienestar animal coccidiose coccidiosis consumer protection control de enfermedades crianza en el suelo crianza libre disease control enfermedades parasitarias floor husbandry free range husbandry gallina ponedora helminthe helminths helmintos higiene hygiene infection layer chickens parasite parasites parasitose parasitoses poule pondeuse protection du consommateur protozoa sanidad animal vaccination