Samples received by the WRLFMD in early July 2018 have been genotyped as O/EA-3.
In contrast to previous serotype O cases in North Africa which were due to the O/ME-SA/Ind-2001 lineage originating from South Asia, phylogenetic analyses place West Africa as the source of this virus (closest viral sequences are from Nigeria); however, without obvious direct epidemiological connections, we should be cautious in attributing specific sources since there are many countries in West and Central Africa that do not submit samples for analyses. Vaccine matching results are pending (expected July 2018).