[Accidental poisoning with silo gas]

Eight cases of poisoning in workers cleaning silo are presented. Silo gas, produced during fermentation of vegetable material, contains very toxic nitrogen oxides. In this group three workers died within silo, four patients were hospitalized (one of them with acute toxic pulmonary oedema, two with sings of pneumonia, one had only transient decrease of consciousness) and recovered without detectable sequelae. One patient, in general good condition, refused hospitalization and recovered.