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US 5,925,359 AGranted
European vaccine strains of the porcine reproductive and respiratory syndrome virus
AssigneeAkzo Nobel N.V.
InventorsPetrus Alphonsus Maria Van Woensel, Jean Guillaume Joseph Demaret
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Abstract
The present invention is concerned with European strains of the Porcine Reproductive Respiratory Syndrome (PRRS) virus, having as a unique feature that they are non-infectious to macrophages, and to methods for the production of such strains. The invention also provides vaccines for the protection of pigs against PRRS, based on these strains, as well as methods for the production of such vaccines.
Claims19
A live attenuated Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) of a European serotype, which is not infectious to macrophages.
Dependencies are inferred from the claim text.