By Dorcus Kimono
Ugandan and Congolese scientists have found that the 2026 Bundibugyo Ebola virus threat likely came from a fresh spillover from wildlife, not from an old outbreak that had remained hidden in the community.
The findings followed joint sequencing work by scientists from Uganda’s Ministry of Health, through the Department of National Health Laboratory and Diagnostic Services, and the Democratic Republic of Congo’s Institut National de Recherche Biomédicale.
The genomic analysis shows that the virus is genetically different from the variants linked to earlier Bundibugyo Ebola outbreaks in Uganda in 2007 and the DRC in 2012.
Health officials say the finding is important because it eases fears that the virus had been silently spreading among people for years. Instead, the evidence points to a new jump from a wild animal reservoir into the human population.
The sequencing gives health teams a clearer picture of the virus they are dealing with, helping laboratories confirm cases, track transmission and guide response teams to areas of risk.
A report published in Nature Medicine says the Ebola index case was a male patient who travelled from the DRC to Uganda and was admitted to a private hospital in Kampala on May 11, 2026, after more than two weeks of illness. He died on May 14.
A posthumous blood sample tested at the Central Emergency Response and Surveillance Laboratory confirmed Bundibugyo virus by RT-qPCR. Scientists later achieved 99 percent genome coverage during sequencing.
According to the report, the 2026 virus formed a distinct lineage, sitting apart from the 2007 to 2008 Butalya and 2012 Isiro variants. The genome differed by 216 to 227 nucleotides, about 1.2 percent sequence divergence.
The authors say the case shows the value of surveillance in both public and private health facilities, national sample referral systems and rapid genomic diagnostics in detecting dangerous infections early.
Uganda and the DRC are using the findings to strengthen cross-border surveillance, prepare health facilities and protect communities along border points where daily movement remains high.
The Ministry of Health has urged the public to remain alert, maintain hygiene and report suspected cases to the nearest health facility or community health worker.
