A method of disinfecting or sterilizing at least a portion of any of a resting, a milking, or a feeding station (3, 24, 26) provided with an animal identification device (18) and located in an area (1), in which milking animals are allowed to move, is provided. Each of the animals visiting the resting, the milking, or the feeding station is identified and is admitted to enter the station depending on the identification. The inventive method comprises the steps of retrieving information regarding the health of each of the animals entering the station; and automatically disinfecting or sterilizing the portion of the station only if the information retrieved reveals that an animal entering the station has an infection that is capable of being transmitted to other animals. The disinfection or the sterilization is performed after that said infectious milking animal has left the station.