Porcine Astrovirus 4 Detection in Lesions of Epitheliotropic Viral Infection in the Porcine Respiratory Tract

Figure 1

Macroscopic lesion of multifocal to coalescing lobular atelectasis of a cranioventral lung lobe from a PoAstV4-positive case. Affected areas are darker pink to red, depressed, and have distinct lobular margins. This is indistinguishable from the common gross findings observed in acute IAV infections.