Etiology of respiratory diseases in pigs in the industrial complex

Respiratory diseases remain one of the key reasons for the decline in livestock productivity, which directly affects the economic efficiency of pig breeding enterprises. In this regard, this article is devoted to the study of the viral and bacterial pathology of the respiratory organs in pigs raised in industrial conditions. The object of the study was 654 pigs, including fattening animals and fallen pigs with signs of respiratory tract damage. In animals, scrapings from the mucous membrane of the nasal cavity were taken in life, and fragments of the lungs, trachea, parenchymal organs (liver, spleen), bone marrow and blood from the heart were taken posthumously. The ratio of bacterial and viral diseases, taking into account the manifestations of infectious pathology, is approximately 1:1. Porcine circovirus type 2 (CVS-2), reproductive respiratory syndrome (RRSS) and colibacillosis, porcine parvovirus infection (PVIS), pasteurellosis and enzootic pneumonia were the most frequently reported. The main etiological agents of respiratory infections are mycoplasmas, circoviruses, causative agents of RRSS and PVI. Such bacterial cultures as Streptococcu ssuis, Actinobacillus pleuropneumoniae, Pasteurella multocida, Bordetella bronchiseptica take part in respiratory pathology. Susceptibility to antimicrobials is different in respiratory pathogens isolated from pigs. This suggests that monitoring of sensitivity to antibacterial drugs should be carried out for each infectious agent.