Bundibugyo Ebola Virus Outbreak: Transmission, Symptoms, and Challenges

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Key takeaways

The ongoing Ebola outbreak in DRC's Ituri province is caused by the rare Bundibugyo strain, resulting in over 10,000 cases and nearly 5,000 deaths.
First identified in 1976 near the Ebola River, the virus has an average fatality rate of 50% and is carried naturally by fruit bats of the Pteropodidae family.
Ebola spreads through direct contact with infected fluids during its 2 to 21 day incubation cycle, though transmission occurs only after symptoms appear.
While approved treatments like Inmazeb and Ebanga exist for the Zaire strain, no specific medical treatments are approved for the Bundibugyo strain.

A severe outbreak of the rare Bundibugyo strain of Ebola originated in the Ituri province in the eastern part of the Democratic Republic of Congo.
This outbreak crossed a major milestone by recording over 10,000 confirmed cases and almost 5,000 deaths.

Ebola is a severe and often deadly viral haemorrhagic fever that affects humans and primates. It belongs to the genus Orthoebolavirus and the family Filoviridae.
The average case fatality rate is around 50%, but it has historically ranged between 25% and 90% based on the specific strain and public health response.

Scientists first discovered this virus in 1976 during two simultaneous outbreaks in Nzara (present-day South Sudan) and Yambuku (Democratic Republic of Congo).
The virus gets its name from the Ebola River located near the Yambuku outbreak site.
Fruit bats from the Pteropodidae family serve as the natural host for this virus in nature.

The virus spreads when a person comes into direct contact with infected body fluids, dirty materials, or dead bodies. It does not spread through normal air droplets.
The incubation period lasts between 2 and 21 days. Patients cannot infect others during this period, as contagiousness starts only after symptoms appear and increases over time.
Early symptoms include fever, tired feeling, muscle pain, and headache. Later stages bring vomiting, diarrhoea, poor organ function, internal bleeding, and multi-organ failure.
Scientists divide the genus into six species: Zaire, Sudan, Bundibugyo, Taï Forest, Reston, and Bombali. Reston and Bombali do not cause disease in humans.
The virus can stay inside semen, eyes, and the central nervous system even after a patient recovers. This creates a risk of late transmission and needs long-term medical checks.

Doctors use approved monoclonal antibody treatments named Inmazeb and Ebanga for Zaire ebolavirus, which lower death rates when given early.
No approved strain-specific treatments currently exist for the Sudan and Bundibugyo strains. Doctors must rely on basic supportive care and experimental drugs.