Histological structure of organs of pigs spontaneously infected by RRSS

The purpose of the work was to study the violation of the histological structure of the lungs and organs of the immune system of piglets with an acute course of the reproductive and respiratory syndrome of pigs. The results of the study showed that in piglets at the age of 40 days, pneumonia is registered with the involvement of predominantly the respiratory parts of the lungs in the process. Pronounced proliferative processes were noted in the interstitium, which is indirectly a sign of a viral infection. Degenerative changes are visualized in the stroma of the lymph nodes and spleen; in the parenchyma there are signs of a lymphoproliferative process, without manifestations of gross changes in the form of cytonecrosis and pronounced apoptosis.