A tendency towards a minimal decrease in the prevalence if icterus in swine and cattle has been observed in Poland since 1990. There has only been a slight increase within pigs (Fig. 1). The most intensive prevalence of icterus in pigs happened in 1996, in the following regions: Koszalin, Tarnobrzeg, Wrocław, Siedlce (Fig. 3) and in cattle in Poznań, Opole, Ciechanów, Leszno and Włocławek (Fig. 4). In these regions largest economic waste caused by the disease was noted. The global economic waste caused by icterus in swine was about 1 257 735 PLN and in cattle about 659 242 PLN.