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===[[Equine Influenza|Equine influenza]]===
 
===[[Equine Influenza|Equine influenza]]===
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===Equine rhinopneumonitis ===
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===[[Equine Rhinopneumonitis]] ===
*Causative agent: [[Herpesviridae|equine herpesvirus type 1 and type 4]]
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*Primary viral lesions in [[Nasal Cavity Inflammatory - Pathology|nasal mucosa]] and [[Lungs Inflammatory - Pathology#Infectious causes of pneumonia|lungs]]
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*Mild, transient [[Lungs Inflammatory - Pathology#Bronchointerstitial pneumonia|bronchointerstitial pneumonia]]
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*Latent infection acting as a reservoir
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*Sites of latency: bronchial lymph nodes and trigeminal ganglia
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*Replicates in upper respiratory tract epithelium
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*Disseminated to lower respiratory tract
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*Transported to other organs in T-lymphocytes - viraemia up to 3 weeks
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*Vasculitis, abortion
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*May be accompanied by secondary bacterial infection
       
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