ETIOLOGY OF PORCINE RESPIRATORY DISEASE COMPLEX ON FARMS OF KHARKIV AND POLTAVA REGIONS

Abstract

The paper reviews the study of the etiology of porcine respiratory disease complex (PRDC). Multiple respiratory infections in pigs are common worldwide and cause great economic losses in pig farming. The paper studied the epizootic situation on pig farms in Poltava and Kharkiv regions in Ukraine in 2019–2023. The findings showed an increase in the frequency of respiratory diseases in pigs, from 11.4 % to 23.7 %. Laboratory tests confirmed the multiple infections of porcine respiratory diseases. The infections included two key viruses (porcine reproductive and respiratory syndrome and porcine circovirus type 2 and from 4 to 8 types of bacteria, depending on the year of study. During the research period, the array of bacterial pathogens changed. The numbers of isolation of Mycoplasma and Pasteurella dropped by 7.2 and 6.3 times, respectively, and Escherichia coli and Actinobacillus increased by 17.7 and 8.0 times, respectively. During the study of antibiotic susceptibility, Streptococcus suis isolates showed the maximum susceptibility to antibiotics, while Pasteurella multocida isolates were the most resistant.