What is the PRRS Virus?

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What is the PRRS Virus?

 

TAXONOMY:

The PRRS virus belongs to the genus Arterivirus, the only genus in the family Arteriviridae, placed with the families Mesoniviridae, Roniviridae and Coronaviridae in the order Nidovirales.


 

    EAV: Equine arteritis virus
    WPDV: Wobbly possum disease virus
Genus Arterivirus   SHFV: Simian haemorrhagic fever virus
    LDV: Lactate dehydrogenase-elevating virus (mice)
    PRRSV: Porcine reproductive and respiratory syndrome virus 


All species in the genus Arterivirus have a nucleotide similarity of around 55-65%. Although arteriviruses share an evolutionary relationship with other members of the order, several of their characteristics are unique: genomic organisation; high genetic variability; morphology of the virion; limited cellular specificity (all replicate in alveolar macrophages, apart from WPDV, for which the cell type is yet unknown); and capacity to cause persistent or, in some cases, asymptomatic infections.

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