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==In Cats==
 
==In Cats==
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===Feline viral rhinotracheitis===
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===[[Feline Herpesvirus 1|Feline viral rhinotracheitis]]===
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*Caused by a [[Herpesviridae|herpesvirus]]
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*Tends to be more [[Nasal Cavity Inflammatory - Pathology#Infectious causes of rhinitis|rhinitis]] than [[Trachea Inflammatory - Pathology#Infectious causes of tracheitis|tracheitis]], may extend to [[Paranasal Sinuses Inflammatory - Pathology#Infectious causes of sinusitis|sinusitis]]
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*Feline herpesvirus -1
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**One of the causes of Feline viral rhinotracheitis
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***Viruses and bacteria are involved in the complex. The most frequent aetiologic agent is [[Herpesviridae|FHV-1]], and less frequently [[Caliciviridae|feline calicivirus]] and/or ''[[Chlamydophila psittaci]]'' (NB: previously called ''Chlamydia psittaci'' var felis)
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*All three agents infect URT respiratory epithelium, although FHV-1 has the highest affinity for this epithelium
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*Feline calicivirus more frequently infects the oral mucosa -> ulcerative stomatitis
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*''C.psittaci'' more frequently infects the conjunctival epithelium -> chronic conjunctivitis
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*Infection of the respiratory epithelium by FHV-1 results in a typical neutrophilic rhinitis with intraepitheial intranuclear eosinophilic [[Degenerations and Infiltrations - Pathology#Cellular Inclusions|inclusion bodies]]
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*Uncomplicated cases resolve in 2-3 weeks
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*FHV-1 remains latent in the trigeminal ganglion, and can reactivate at times of stress
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*Can infect the cornea -> ulcerative keratitis
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*Mortality may be high in young kittens, debilitated and immune-suppressed animals, usually associated with secondary bacterial infection.
       
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