Sensibilization activity of the fodder yeasts grown on the sulphate wastes of pulp and paper mills in inhalation, into and onto skin injection experiments with guinea pigs was studied. This activity depended on the action intensity. Application onto skin is more effective, than injection into skin. 10 mg/m3 caused statistically significant allergic effects in inhalation experiments, but 0.8 mg/m3--had no significant effects.
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