[Biological evaluation of Indian and Chinese talc aggressiveness].

In order to evaluate biologically the action of two different kinds of talc pulmonary and hemolytic tests were applied and pathomorphological examination carried out on animals. The study was performed on 120 rats within the 6th and 9th months periods. The talcs used in the experiment did not indicate any fibrogenic properties. Morphologic examination did not show any differences in the pathogenetic activity between the Indian and Chinese talcs Inflammatory changes within the lungs and bronchi, pulmonary emphysema and increased levels of fibrosis indices in biochemical examinations have drawn our attention to problems connected with longterm exposure to talc dust.