[Substantiation of maximum permissible concentration of nutrient yeasts obtained during utilization of waste products in cellulose-paper industry].

The contributors used the sensibilization threshold to establish MACs for the dust of the fodder yeast produced as a result of pulp and paper waste products' recycling. The product belongs to the group of substances with low toxicity. It does not produce local irritation and exhibits sensibilization properties in case of both epi- and intracutaneous introduction. The sensibilization threshold in repeated introductions of protein-containing dusts was registered at 4.1 mg/m3. In industrial conditions, the fodder yeast concentrations at the level of about 4 mg/m3 caused increased morbidity with temporary disability.