3.4 | Serotype A
Twenty-three serotype A viruses belonging to the A/AFRICA/G-IV lineage were genotyped (Figure 3) during this study. For Sudanese FMD viruses, collected during 2018, sequences belonged to two genetic clades (12.8-14.6% nt difference), with older sequences represented in ancestral clusters. One of these contemporary clusters containing A/SUD/6-9/2018 also contained sequences for FMD viruses collected during 2015-17 in Egypt. At the common root of both clusters were sequences for FMDVs collected during 2006 from Sudan and Eritrea.