EN
The article aimed at drawing attention to the problem of mycotoxicoses, appearing in cattle and often undiagnosed because of lack of characteristic clinical signs. It described an outbreak of mycotoxicosis in one of the dairy-cattle herd in north-east Poland. In this case, DON, 3-Ac-DON, OTA, T-2 toxin, and ZEA were found in the feed and were considered as causative agents in a decrease in milk yield, occurrence of clinical symptoms of toxicosis, and death of some cows.