[Detection of the nucleolar activity in alveolar macrophages of swine]

With the help of the toluidine blue-staining-technique different characteristic shapes of alveolar macrophage nucleoli were detected, indicating differences in the rRNA synthesis activity of these cells. After application of a Pasteurella multocida aerosol the percentage of alveolar macrophages with a high rRNA synthesis increased. No correlation between the nucleolar activity and the efficacy of the clearance of aerogenously administered Pasteurella could be measured.