NEW ATTENUATED STRAIN OF THE VIRUS CAUSING THE PORCINE REPRODUCTIVE RESPIRATORY SYNDROME (PRRS), VACCINES AND DIAGNOSTIC MEANS OBTAINABLE WITH SAID STRAIN, AND PRODUCTION PROCESS

摘要

The invention relates to a new attenuated strain (CNCM Institut Pasteur I-1642) of the virus causing the porcine disease known as porcine reproductive respiratory syndrome (PRRS), as well as to a process for the attenuation and replication of said strain by the use of a new clone obtained from monkey kidney cells MA-104 (CNCM Institut Pasteur I-1643). Due to its innocuousness for the suines and due to its high immunogenic activity, said new attenuated strain provides for the production of vaccines and diagnostic means which make possible an early diagnosis of PRRS and an efficient preventive treatment of said disease.