干旱区生态环境知识资源中心

A total of 157 camel lung samples were collected and processed for histopathological examination. The incidence of pulmonary silicosis, pulmonary anthracosis and pulmonary haemosiderosis recorded was 5.73, 7.01 and 4.45%, respectively. Microscopically, silicosis revealed aggregation of dust laden phagocytes in alveolar lumen as well as in alveolar wall, especially in peribronchial and perivascular area. In some cases, silicotic nodules were formed with concentric layers of fibres laid down around the aggregates of dust laden phagocytes without any accompanying cellular reaction.

Anthracosis revealed focal accumulation of carbon particles in alveolar wall and lumen, more particularly in perivascular and peribronchial area. There was no accompanying cellular reaction. Numerous haemosiderinophages were seen in the alveolar lumen as well as in the alveolar wall sections stained with Prussian blue method gave blue colour to haemosiderin.