Changes

== Introduction ==

== Introduction ==

Porcine Respiratory Coronavirus (PRCV) is a coronavirus that is a deletion mutant variant, which is antigenically related to Transmissibel Gastroenteritis Virus of Pigs (TGEV). They differ by only one antigen of a spike protein. This virus is '''endemic''' in Europe and is thought to have 'replaced' TGEV, which is now rarely seen.

Porcine Respiratory Coronavirus ('''PRCV''') is a [[Coronaviridae|coronavirus]] that is a deletion mutant variant, which is antigenically related to [[Transmissible Gastroenteritis Virus]] of Pigs (TGEV). They differ by only one antigen of a spike protein. This virus is '''endemic''' in Europe and is thought to have 'replaced' TGEV, which is now rarely seen.

 

 

== Signalment ==

== Signalment ==

Pigs of any age

Pigs of any age.

 

 

== Clinical Signs ==

== Clinical Signs ==

The virus does not usually produce any clinical signs in the respiratory or gastrointestinal tract. If complicated by secondary bacterial infections, or if present concurrently with an immunosuppressive virus e.g. porcine circovirus, then a mild- moderate [[Pneumonia Overview#Infectious_causes_of_pneumonia|pneumonia]] may occur and the animal may be seen to have an increased respiratory rate and cough.

The virus does not usually produce any clinical signs in the respiratory or gastrointestinal tract. If complicated by secondary bacterial infections, or if present concurrently with an immunosuppressive virus e.g. [[Porcine Circovirises|porcine circovirus]], then a mild- moderate [[Pneumonia Overview|pneumonia]] may occur and the animal may be seen to have an increased respiratory rate and cough.

 

 

== Diagnosis ==

== Diagnosis ==

Usually this virus is an incidental finding- mostly when it confuses diagnosis of TGEV in serological tests.  The virus can be isolated using ELISA.

Usually this virus is an incidental finding - mostly when it confuses diagnosis of TGEV in serological tests. The virus can be isolated using [[ELISA testing|ELISA]].

 

 

== Control ==

== Control ==

This disease rarely causes any clinical signs and is usually an incidental finding in the pig.  

This disease rarely causes any clinical signs and is usually an incidental finding in the pig.  

Emergence of this mutant virus has led to natural vaccination against the pathogenic Transmissable Gastroenteritis Virus of Pigs (TGEV), which has been almost absent since the emergence of this virus. This is better on the whole, as TGEV is much more severe than this disease.

Emergence of this mutant virus has led to natural vaccination against the pathogenic Transmissable Gastroenteritis Virus of Pigs (TGEV), which has been almost absent since. This is better on the whole, as TGEV is much more severe than this disease.

 

Blood, D.C. and Studdert, V. P. (1999) Saunders Comprehensive Veterinary Dictionary (2nd Edition), Elsevier Science <br>Cowart, R.P. and Casteel, S.W. (2001) An Outline of Swine diseases: a handbook, Wiley-Blackwell<br>Jackson, G.G. and Cockcroft, P.D. (2007) Handbook of Pig Medicine, Saunders Elsevier <br>Taylor, D.J. (2006) Pig Diseases (Eighth edition), St Edmunsdbury Press ltd <br>

Taylor, D.J. (2006) '''Pig Diseases '''(Eighth edition), ''St Edmunsdbury Press ltd ''

[[Category:Coronaviridae]] [[Category:Pig_Viruses]] [[Category:Respiratory_Diseases_-_Pig]] [[Category:To_Do_-_Review]] [[Category:Respiratory_Viral_Infections]]

[[Category:Coronaviridae]] [[Category:Pig_Viruses]] [[Category:Respiratory_Diseases_-_Pig]] [[Category:Expert_Review - Farm Animal]] [[Category:Respiratory_Viral_Infections]]