All of the 22 known genotypes are present in Africa. Genotype I isolates are primarily present in West Africa,with the remaining 21 genotypes in the eastern and southern regions of the continent.
All ASFV isolates previously present in Europe and the western hemisphere belonged to West Africa genotype I.
However, a genotype II isolate similar to those circulating in southeastern Africa was introduced into the Caucasian region in 2007 (EFSA 2010).