Comparative analysis of the upper respiratory tract microflora in weaned pigs and gilts with nonspecific bronchopneumonia
The purpose of the study was to conduct a comparative analysis of the microflora of pigs isolated from young pigs with bronchopneumonia. In this study, we studied microorganisms isolated from the nasal passages from weaned pigs and gilts with a clinically and pathologically confirmed diagnosis of acute purulent-catarrhal bronchopneumonia. The study found that it is possible due to a change in the conditions of keeping piglets of weaners and gilts that there was a violation of the microbiocenosis of the upper respiratory tract, which led to the multiplication of such microorganisms of the genera Klebsiella spp., Proteus spp., Pasteurella spp., Escherichia spp., Myroides spp., Streptococcus spp., which may be involved in the infectious process. The number of E. coli increased from 72.7 to 100 %, the number of Proteus spp. statistically significantly changed among the genus from 13.6 % to 76.2 %, Myroides spp. from 18.2% to 57.1 %. Decrease in non-fermenting gram-negative bacteria of the genera Commamonas spp. and Acinetobacter spp. from 22.7 % to 0 % and from 50.0 % to 23.8 %, respectively, as well as a decrease in the number of Streptococcus suis strains from 50% to 9.5 %. Perhaps due to an increase in representatives of the genus Enterobacterales, there is an increase in the incidence of bronchopneumonia in weaned piglets more often than in gilts.