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==Introduction==
 
==Introduction==
 
Toroviruses are relatively new viruses belonging to the family Coronaviridae.  The viruses are enveloped positive sense single-stranded RNA (ssRNA) viruses that are pleomorphic, 120-140 nm in diameter and are relatively stable in acid or alkaline environment between pH 2.5-10. Toroviruses have been isolated from horses (Equine torovirus, ETV, prototype Berne virus) and calves with diarrhoea (bovine torovirus, BoTV, prototype Breda virus).  
 
Toroviruses are relatively new viruses belonging to the family Coronaviridae.  The viruses are enveloped positive sense single-stranded RNA (ssRNA) viruses that are pleomorphic, 120-140 nm in diameter and are relatively stable in acid or alkaline environment between pH 2.5-10. Toroviruses have been isolated from horses (Equine torovirus, ETV, prototype Berne virus) and calves with diarrhoea (bovine torovirus, BoTV, prototype Breda virus).  
[[File:Torovirus3.jpg|thumb|200px|right|]]
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[[File:Torovirus|thumb|200px|right|]]
    
==Signalment==
 
==Signalment==
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