[Mushroom grower's lung. Apropos of 3 cases]. / Le poumon du champignonniste. A propos de trois cas.

Three cases of mushroom growers lung, responding to the criteria for an extrinsic allergic alveolitis, have been observed in the Hôpital Bichat, Paris. In the first case, a "semi-delayed" hypersensitivity phenomenon of type III was evoked, an "immediate" type I phenomenon in case 2, and an association of the two in the third case. Clinical manifestations may develop very rapidly in subjects working in areas where they are exposed to a high inoculum of fungal products. Multiple antigens are involved: Psalliota, actinomycetes of different varieties, manure substrate, fungal spores, bacteria, cereal dust, etc. A recognized occupational disease, it leads to a change in activity and the right to compensation.