Changes

**2 forms of the disease

**2 forms of the disease

***'Progressive' atrophic rhinitis

***'Progressive' atrophic rhinitis

****Due to infection of the nasal turbinates by P.multocida strains carrying the toxA gene that encodes for an osteolytic toxin. ''P.multocida'' adheres poorly to mucous membranes, and therefore requires a predisposing nasal insult to assist colonisation eg: co-infection with ''B.bronchoseptica''; or Porcine cytomegalovirus (inclusion body rhinitis)

****Due to infection of the nasal turbinates by P.multocida strains carrying the toxA gene that encodes for an osteolytic toxin. ''P.multocida'' adheres poorly to mucous membranes, and therefore requires a predisposing nasal insult to assist colonisation eg: co-infection with ''B.bronchiseptica''; or Porcine cytomegalovirus (inclusion body rhinitis)

****Turbinate bone atrophy is permanent and progressive

****Turbinate bone atrophy is permanent and progressive

***'Non-progressive' atrophic rhinitis

***'Non-progressive' atrophic rhinitis

****Due to infection of the nasal turbinates by ''Bordatella bronchoseptica'' strains alone, that carry a gene that encodes for a dermonecrotic toxin.

****Due to infection of the nasal turbinates by ''Bordatella bronchiseptica'' strains alone, that carry a gene that encodes for a dermonecrotic toxin.

****Turbinate bone can regenerate by the time of slaughter

****Turbinate bone can regenerate by the time of slaughter

**'Snuffles' in rabbits

**'Snuffles' in rabbits

****Most often ''P.multocida'' and/or ''B.bronchoseptica'' infection of the nasal mucosa

****Most often ''P.multocida'' and/or ''B.bronchiseptica'' infection of the nasal mucosa

****Clinical signs (nasal discharge, sneezing) result from an acute to chronic rhinitis.  

****Clinical signs (nasal discharge, sneezing) result from an acute to chronic rhinitis.  

[[:Category:RVC]], [[:Category:R(D)SVS]], [[:Category:CUVS]], [[:Category:PG]],  

[[:Category:RVC]], [[:Category:R(D)SVS]], [[:Category:CUVS]], [[:Category:PG]],