The main natural route of infection of pigs in Europe is oro-nasal by direct or indirect contact with nfected pigs or by feeding of virus-contaminated feed. However, in those areas where vectors exist, transmission via these vectors plays a very important role in virus persistence and spread. ASF may also spread via indirect contact with contaminated materials and via biting insects which mechanically transport the ASF virus. Disease transmission may also occur via semen of infected boars.
3. V Evropi je glavna naravna pot okužbe oro-nazalna, z neposrednim ali posrednim stikom z okuženimi prašiči ali zaradi krmljenja s krmo, kontaminirano z virusom. V območjih, kjer obstajajo vektorji fn, pa igra prenos prek teh vektorjev pomembno vlogo pri ohranjanju virusa in njegovemu širjenju. APK se lahko širi tudi s posrednim stikom z okuženim materialom in z ugrizi žuželk, ki mehansko prenašajo virus APK. Bolezen se lahko prenaša tudi s semenom okuženih merjascev.