EN
The aim of the study was to determine the degree of conflictogenity of some animal species and to show the reasons for this conflictogenity that, in turn, result in the issuing of veterinary expert opinions. Research was carried out on 173 expert opinions, collected from the whole country, and drawn up by scientists from the Department of Forensic and Administration of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, between 1995 and 2005. In most cases (68.2%) these opinions established the actual state of the cases examined in civil proceedings. It was found that the most frequent expert opinions were issued on poultry (61.8%) and, in particular, on broilers, turkeys and hens. These opinions indicated that bacteria (mainly Escherichia coli and species of Clostridium genus) and fungi, or their toxins, were the predominant causative agents responsible for the examined losses in poultry production. It was established that breeders were to blame for these losses in only a few of the cases. The expert opinions on cattle and horses were commissioned by both insurance companies and civil courts - quite frequently veterinary surgeons were imputed. The opinions on dogs were mainly of a penal character and aimed at determining the cause of death. An analysis of opinions issued over the last ten years indicated that there had been a significant decrease in the role of infectious agents originating in the diet in instituting proceedings. Furthermore, the quality of veterinary documentation had improved only slightly.