TY JOUR TI SPREAD OF VIRAL DISEASES OF PIGS IN FARMS OF THE KRASNOYARSK REGION KW porcine parvovirus disease KW reproductive and respiratory syndrome KW porcine circovirus disease KW diagnostics KW specific prevention KW vaccination JO Bulletin of KSAU AU Stroganova, I.Y. AU Danilkina, O.P. AU Schislenko, S.A. AU Moroz, A.A. PY 2025 IS 0 PB Krasnoyarsk State Agrarian University