Summary
° What is already known about this topic?
§ Clinical and epidemiologic descriptions of Bundibugyo virus disease (BVD) are rare; case-fatality rates in previous outbreaks have ranged from 32% to 55%. Effective treatments have not been described.
° What is added by this report?
§ Among the first 21 cases (20 confirmed; one probable) in the 2026 Uganda BVD outbreak, 18 were admitted to the Mulago National Referral Hospital Ebola Treatment Unit (ETU). Among these 18, all had elevated liver enzymes, hypoalbuminemia, and hyponatremia on ETU admission. All 18 received treatment with remdesivir through an off-label, compassionate-use protocol. Among 20 confirmed cases, 18 (90%) patients survived; two deaths occurred among patients with confirmed cases whose infections were recognized late. Seeking care promptly might have reduced the number of deaths.
° What are the implications for public health practice?
§ Communicating with the public about the benefits of seeking health care promptly when BVD is suspected might improve patient outcomes. Clinical trials of remdesivir for patients with BVD might be warranted.
Abstract
Ebola disease is a viral hemorrhagic fever caused by viruses of the genus Orthoebolavirus. Bundibugyo virus (Orthoebolavirus bundibugyoense), first identified in 2007 in Bundibugyo District, Uganda, is one of four orthoebolaviruses known to cause Ebola disease in humans; only two previous Bundibugyo virus disease (BVD) outbreaks have been documented. Transmission occurs through direct contact with infectious blood or other body fluids. Common signs and symptoms include fever, abdominal pain, diarrhea, vomiting, weakness, and bleeding from orifices and injection sites. Case-fatality rates (CFRs) among confirmed cases in the two previous outbreaks ranged from 32% to 55% (1,4). No licensed vaccine or specific treatment is available for BVD; clinical management is primarily supportive. On May 15, 2026, the Uganda Ministry of Health confirmed an outbreak of BVD imported from the neighboring Democratic Republic of the Congo (DRC). On August 26, 2026, the outbreak was declared over in Uganda with 20 confirmed BVD cases and one probable case reported, although the outbreak in DRC is ongoing. This report describes the clinical and epidemiologic characteristics of all 21 cases. This activity was reviewed by CDC, deemed not research, and conducted consistent with applicable federal law and CDC policy.*
Source:
Link: http://dx.doi.org/10.15585/mmwr.mm7535a2
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