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Rachel V Thomas

Ebola Death Toll Tops 2,000 In DRC: New Study Reveals Likely Source Of Bundibugyo Virus Outbreak

The death toll from Ebola has crossed 2,000 in the Democratic Republic of the Congo (<span>DRC</span>), three months after the outbreak was officially declared in May.

The outbreak has caused 4,381 confirmed cases across five provinces, making it the fastest-growing Ebola outbreak recorded in the Central African country.  The response has been complicated by strikes by unpaid health workers, misinformation and cultural practices.

<h2>Ebola Virus Outbreak Began in February</h2>

The outbreak is caused by the rare <span>Bundibugyo</span> strain of Ebola, for which there is currently no approved treatment or vaccine.

According to the World Health Organization (WHO), the virus first emerged in the DRC in February, about three months before the outbreak was officially declared in the DRC and neighboring Uganda on May 15.

Some early patients were reportedly treated for malaria or typhoid, which can initially cause fever, weakness, vomiting and diarrhea. Early testing also focused on the more common Zaire strain of Ebola, delaying recognition of the Bundibugyo virus.

By early May, WHO had identified an unusual cluster of severe illness and deaths in the Mongbwalu health zone in Ituri Province. An investigation covering April 15 to May 13 subsequently identified 246 suspected cases and 65 deaths across three health zones.

The response has also been affected by conditions in Ituri, including armed conflict, population displacement and poor road access. Health workers have faced shortages of protective equipment, while some healthcare facilities have been affected by workers' strikes.

<h2><span rel="noindex">Zoonotic Spillover Likely Triggered</span> the Outbreak</h2>

A new study published in Nature Medicine suggests that the outbreak began through a zoonotic spillover event, meaning the virus jumped from animals to humans before spreading between people.

Researchers from Congo, Uganda, Belgium and other countries found that the outbreak strain was genetically distinct from <span>Bundibugyo Ebola</span> viruses identified during previous outbreaks in 2007 and 2012.

The findings are consistent with a new animal-to-human transmission event, followed by sustained human-to-human transmission.

The study did not identify the specific animal source. However, Ebola viruses are known to periodically spill over from infected animals into human populations.

Genetic analysis also confirmed that cases detected in Uganda were linked to the outbreak in Congo.

Bundibugyo virus disease (BVD) outbreaks were previously recorded in 2007–2008 in Bundibugyo District, Uganda, and in 2012 in Isiro, DRC.

For the 2026 outbreak, researchers generated 22 viral genomes from samples collected from patients with BVD in the DRC and Uganda.

The genomes formed a well-supported phylogenetic cluster separate from variants associated with the 2007 and 2012 outbreaks. The analysis also showed evidence of sustained human-to-human transmission.

The researchers called for greater decentralized laboratory diagnostic capacity, including pan-Orthoebolavirus testing and genomic sequencing, to improve early detection and control of future outbreaks.

<h2>How Does Ebola Spread From Animals to Humans?</h2>

Ebola can jump to humans from infected animals such as bats, monkeys and apes. Transmission can occur through contact with blood, body fluids, excrement or raw meat during hunting and butchering.

Once the virus enters the human population, it can spread from person to person through contact with infected bodily fluids.

<h2>Symptoms of Bundibugyo Virus Disease</h2>

Symptoms of Bundibugyo virus disease are similar to those caused by other Ebola viruses and can include:

<ul><li>Fever</li><li>Headache</li><li>Muscle pain</li><li>Weakness</li><li>Diarrhea</li><li>Vomiting</li><li>Stomach pain</li><li>Unexplained bleeding or bruising, usually in later stages of illness</li></ul>

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The death toll from Ebola has crossed 2,000 in the Democratic Republic of the Congo (DRC), three months after the outbreak was officially declared in May.The outbreak has caused 4,381 confirmed cases across five provinces, making it the fastest-growing Ebola outbreak recorded in the Central African country.  The response has been complicated by strikes by unpaid health workers, misinformation and cultural practices.Ebola Virus Outbreak Began in FebruaryThe outbreak is caused by the rare Bundibugyo strain of Ebola, for which there is currently no approved treatment or vaccine.According to the World Health Organization (WHO), the virus first emerged in the DRC in February, about three months before the outbreak was officially declared in the DRC and neighboring Uganda on May 15.Some early patients were reportedly treated for malaria or typhoid, which can initially cause fever, weakness, vomiting and diarrhea. Early testing also focused on the more common Zaire strain of Ebola, delaying recognition of the Bundibugyo virus.By early May, WHO had identified an unusual cluster of severe illness and deaths in the Mongbwalu health zone in Ituri Province. An investigation covering April 15 to May 13 subsequently identified 246 suspected cases and 65 deaths across three health zones.The response has also been affected by conditions in Ituri, including armed conflict, population displacement and poor road access. Health workers have faced shortages of protective equipment, while some healthcare facilities have been affected by workers' strikes.Zoonotic Spillover Likely Triggered the OutbreakA new study published in Nature Medicine suggests that the outbreak began through a zoonotic spillover event, meaning the virus jumped from animals to humans before spreading between people.Researchers from Congo, Uganda, Belgium and other countries found that the outbreak strain was genetically distinct from Bundibugyo Ebola viruses identified during previous outbreaks in 2007 and 2012.The findings are consistent with a new animal-to-human transmission event, followed by sustained human-to-human transmission.The study did not identify the specific animal source. However, Ebola viruses are known to periodically spill over from infected animals into human populations.Genetic analysis also confirmed that cases detected in Uganda were linked to the outbreak in Congo.How Was the Study Conducted?Bundibugyo virus disease (BVD) outbreaks were previously recorded in 2007–2008 in Bundibugyo District, Uganda, and in 2012 in Isiro, DRC.For the 2026 outbreak, researchers generated 22 viral genomes from samples collected from patients with BVD in the DRC and Uganda.The genomes formed a well-supported phylogenetic cluster separate from variants associated with the 2007 and 2012 outbreaks. The analysis also showed evidence of sustained human-to-human transmission.The researchers called for greater decentralized laboratory diagnostic capacity, including pan-Orthoebolavirus testing and genomic sequencing, to improve early detection and control of future outbreaks.How Does Ebola Spread From Animals to Humans?Ebola can jump to humans from infected animals such as bats, monkeys and apes. Transmission can occur through contact with blood, body fluids, excrement or raw meat during hunting and butchering.Once the virus enters the human population, it can spread from person to person through contact with infected bodily fluids.Symptoms of Bundibugyo Virus DiseaseSymptoms of Bundibugyo virus disease are similar to those caused by other Ebola viruses and can include:FeverHeadacheMuscle painWeaknessDiarrheaVomitingStomach painUnexplained bleeding or bruising, usually in later stages of illness

ebola death toll tops 2,000 in drc: new study reveals likely source of bundibugyo virus outbreak

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