PATHOGENESIS
The sites of primary ASFV replication are the monocytes and macrophages of the lymph nodes nearest the point of virus entrance.
In the case of oral exposure, the monocytes and macrophages of the tonsils and mandibular lymph nodes are the first involved.
Thereafter, the virus spreads through the blood and/or lymphatic system to the sites of secondary replication, that is, lymph nodes, bone marrow, spleen, lungs, liver, and kidneys.
Viremia usually begins 4–8 days postinfection (DPI) and, due to the absence of neutralizing antibodies, persists for weeks or months.