| A spectrum of airborne organic particulate matter, appropriately sized to reach pulmonary acini, produces this disease. |
| Edema occurs frequently, the fluid in the acini often containing red blood-cells. |
| The glands of Lieberkhn elongate, the number of acini increases, and the contained cells multiply. |
| In cases with moderate or advanced changes, marked immunoreactivity was observed in the interlobular area and in the area surrounding both the acini and intralobular ducts. |
| The airway wall is composed of many interrelated structural components such as epithelium, connective tissue, vessels, muscle, and mucus-secreting gland acini. |
| The cells on the periphery of the acini exhibited typical fatty infiltration. |
