EN
The studies were conducted on 60 Polish Large White piglets of both sexes, coming from commercial farms and raised under standard sanitary conditions. They were divided into two groups. Group I - control - consisted of 30 healthy piglets, showing no clinical disease symptoms. Group II - experimental - included 30 piglets with symptoms of diarrhea. Clinical and biochemical tests were performed on all of them at the age of 7, 21 and 35d (7 d after weaning). Microbiological and post-mortem examinations were carried out on 18 animals selected at random from both groups. The research results indicate that an increase in the level of C-reactive protein in piglets suffering from catarrhal enteritis does not exceed 100% of the level determined in healthy animals.