**Large basophilic [[Degenerations and Infiltrations - Pathology#Cellular Inclusions|intranuclear inclusion bodies]] in the surface and subepithelium of nasal and sinus glandular epithelium with lymphocytic infiltration of the mucosa
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**Large basophilic [[Cellular Inclusions|intranuclear inclusion bodies]] in the surface and subepithelium of nasal and sinus glandular epithelium with lymphocytic infiltration of the mucosa
**Bursting of nucleus with cell necrosis and sloughing of necrotic epithelium
**Bursting of nucleus with cell necrosis and sloughing of necrotic epithelium
*Can develop viraemic stage, with inclusions and focal necrotising lesions in other organs eg: renal tubular epithelium
*Can develop viraemic stage, with inclusions and focal necrotising lesions in other organs eg: renal tubular epithelium