PRRS specific lesions differentiation, from other viral infectious etiology

Abstract

PRRS syndrome, is an infectious disease found it in intensive rearing of pigs where is producing important economic losses. After 1990, the disease has spread all over the world. In Romania was diagnosed in 1998 by teams led by Dr. STĂNUICĂ and Dr. OLARU (3). The etiological agent is represented by a virus with two genotypes respectively type 1, European, and type 2, American, who have a degree of gene sequence similarity of 50-60% (6.). In Romania, the disease has an evolution characteristic for primary outbreaks affecting all categories of pigs, but also has an endemic evolution, wich is associated with some bacterial infectious diseases (3,4,5,). The aim of this study was to evidentiate some specific lesion for PRRS, and try to establish a differential diagnosis from other bacterial infectious diseases, with viral etiology.