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. 2001 Dec 25;47(1):9–25. doi: 10.1046/j.1439-0450.2000.00305.x

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Porcine reproductive and respiratory syndrome virus (PRRSV)‐induced interstitial pneumonia (group 1, 14 days post‐infection). Hyperplasia and hypertrophy of type II pneumocytes (arrows). (a) Decaying cells in alveolar clefts and cell detritus; haematoxylin‐eosin (HE); × 600. (b) Massive accumulation of pyknotic cells in alveolar clefts. HE; ×480.