Abstract: The present disclosure provides full-automatic ultra-filtration equipment, and relates to the technical field of biopharmaceutical equipment to solve the technical problems that the labor cost is wasted and the health standard for biological pharmacy is not met since a reflux end of the traditional ultra-filtration equipment has only one outlet pipeline and different feed liquids in different process stages cannot be collected automatically after outflowing from the reflux end. The device includes a main loop container, an ultra-filtration membrane and a control module. The ultra-filtration membrane at least includes an input end and a reflux end. An outlet of the main loop container is connected with the input end of the ultra-filtration membrane through a first pipeline, and the first pipeline is provided with a main loop pump. The reflux end is provided with a reflux pipeline, a first control assembly and a plurality of first outlet branch pipelines.

Abstract: The present disclosure provides an attenuated live vaccine strain and the formulations thereof, for preventing pigs from infection of porcine reproductive and respiratory syndrome (PRRS). The preparation methods for the vaccines and the formulations are also provided. The attenuated live vaccine strain provided herein offers significant immunological protection to pigs against PRRS. The vaccine formulations of the present disclosure also have advantages in long shelf lives as well as good stability during storage.

Abstract: The present disclosure provides an attenuated live vaccine strain and the formulations thereof, for preventing pigs from infection of porcine reproductive and respiratory syndrome (PRRS). The preparation methods for the vaccines and the formulations are also provided. The attenuated live vaccine strain provided herein offers significant immunological protection to pigs against PRRS. The vaccine formulations of the present disclosure also have advantages in long shelf lives as well as good stability during storage.