An alarming pattern has emerged in one of Africa’s most important wildlife conservation areas, where dead hippopotamuses have been discovered along a river in the eastern Democratic Republic of the Congo. What initially appeared to be several isolated wildlife deaths has developed into a confirmed disease outbreak, raising fresh concerns about the animals living in and around the affected region.

The situation has also brought renewed attention to Virunga National Park’s ongoing conservation efforts, particularly after a major recovery in its hippo population was recorded earlier in 2026. With the disease having affected the species before, authorities are now watching closely for signs of further spread.

Anthrax Outbreak Confirmed After Hippos Found Dead in Virunga

The first warning signs appeared in September 2026, when several hippopotamus carcasses were discovered floating in the Semuliki River in North Kivu, eastern Democratic Republic of the Congo.

The discovery prompted intervention from the Institut Congolais pour la Conservation de la Nature (ICCN), the country’s nature-conservation authority. On September 24, officials issued a warning about the suspicious deaths and urged nearby communities not to touch or consume the dead animals.

Five days later, on September 29, the ICCN announced that laboratory analyses had identified anthrax as the cause of death. The testing was conducted jointly by veterinarians from Virunga Doctors and ICCN. The Congolese Press Agency reported the confirmation on September 30.

The laboratory findings established that the deaths were linked to anthrax, an infectious disease caused by the bacterium Bacillus anthracis.

However, the September discoveries were not the first indication of anthrax activity in the wider area.

According to an ICCN report published on September 30, a hippopotamus carcass discovered on August 8 in the Vitshumbi fishing enclave was associated with an anthrax case confirmed by the Kibirizi Health Zone on August 14.

This earlier case suggests that the disease had already been detected in the surrounding region before the larger wave of hippo deaths became apparent.

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The Democratic Republic of the Congo is also dealing with other serious infectious-disease developments alongside the wildlife anthrax outbreak. For broader regional context, see our Bundibugyo Ebola evacuation report.

Hippo Death Toll Rises as Outbreak Continues

As investigations progressed, the number of recorded deaths continued to increase.

By November 2, Al Jazeera reported that park officials had documented 28 hippopotamus deaths over approximately a month. Three days later, the reported toll had increased to at least 30.

ABC News reported the updated figure on November 5, citing Laura Parker, head of Virunga’s conservation programs.

The deaths represent another serious challenge for the park’s hippopotamus population, which has already experienced significant losses from previous disease outbreaks.

Although the current figures are considerably lower than the losses recorded during the previous year’s outbreak, the recurrence of anthrax has raised concerns about the vulnerability of a species that has been gradually recovering.

Date	Reported development
August 8, 2026	A hippo carcass was discovered in the Vitshumbi fishing enclave.
August 14, 2026	The Kibirizi Health Zone confirmed an associated anthrax case.
September 24, 2026	ICCN warned communities after suspicious hippo carcasses were discovered in the Semuliki River.
September 29, 2026	Laboratory testing by Virunga Doctors and ICCN confirmed anthrax.
September 30, 2026	The Congolese Press Agency reported the laboratory confirmation.
November 2, 2026	Al Jazeera reported 28 hippo deaths.
November 5, 2026	ABC News reported at least 30 deaths.

Why Authorities Are Cautiously Optimistic About the Situation

Despite the rising death toll, the latest update offers a potentially encouraging development.

Laura Parker told ABC News that no new cases had been identified during the previous two weeks. However, she stressed that monitoring was continuing.

She said:

“the situation continues to be closely monitored.”

Parker also explained that park authorities were associating the apparent improvement with the arrival of significant rainfall.

Officials remain cautiously optimistic that the outbreak may not produce further cases, but they have not declared it over.

The distinction matters. A period without newly identified deaths does not automatically establish that anthrax transmission has stopped. Wildlife mortality can be difficult to detect immediately across a large protected landscape, making continued surveillance essential.

For now, the response remains focused on monitoring the affected areas, recording suspected wildlife deaths, managing carcasses safely and limiting potential exposure among nearby communities and animals.

What Is Anthrax and Why Is It Dangerous?

Anthrax is an infectious disease caused by the bacterium Bacillus anthracis. Unlike many bacterial infections, anthrax can produce spores that survive in the environment for extended periods.

These spores can remain in soil and potentially infect animals that come into contact with contaminated material.

Wild and domestic animals are vulnerable to infection, while humans can also contract anthrax, particularly through exposure to infected animals or contaminated animal products.

This makes the Virunga outbreak more than a wildlife conservation issue. It also presents a public-health concern for communities living near the affected areas.

The ICCN has issued precautions designed to prevent people and animals from coming into contact with potentially infected carcasses.

Residents have been instructed not to:

• Touch or skin animals found dead.
• Consume meat from animals discovered dead or sick.
• Move, cut up, bury or burn suspected carcasses.
• Buy, sell or transport meat from animals found dead or sick.
• Allow children, livestock or domestic animals near carcasses.
• Use water close to affected animals.

Communities have also been encouraged to report suspected carcasses to the relevant authorities.

As of November 5, no human cases had been reported from the current 2026 hippo outbreak. However, Nature reported that authorities remained concerned about potential exposure because wildlife-associated infections can be difficult to identify in some communities.

The current situation should also be distinguished from the broader anthrax outbreak experienced by the Democratic Republic of the Congo in 2025, which involved human cases as well as wildlife. The World Health Organization supported the response to that outbreak.

Virunga Faced Another Major Anthrax Outbreak in 2025

The latest deaths are particularly concerning because Virunga experienced a significant anthrax outbreak in 2025.

That outbreak killed approximately 65 hippopotamuses, making disease an important factor in the species’ recent conservation history.

The February 2026 population assessment specifically identified the previous outbreak among the challenges affecting the hippo population.

Despite those losses, the survey recorded encouraging numbers. Virunga was home to more than 2,700 hippos, distributed across 171 groups, with 153 calves recorded during the census.

The latest outbreak therefore comes at a time when the population is showing signs of recovery.

However, the longer history of the species in the park reveals just how significant that recovery has been.

Virunga’s Hippo Population Has Recovered From a Dramatic Decline

Virunga’s hippopotamus population was once considerably larger than it is today.

According to the park, the population stood at nearly 29,000 individuals in 1974. Decades of poaching, habitat pressures and instability contributed to a dramatic decline.

By 2005, fewer than 1,000 hippos remained.

The February 2026 census recorded more than 2,700 individuals, demonstrating substantial progress compared with the population’s lowest recorded levels.

The largest concentration was found south of Lake Edward, identified by the park as the species’ principal stronghold.

The survey also recorded 171 groups and 153 calves, offering further evidence of population recovery.

Virunga used several conservation monitoring methods to conduct the assessment, including ranger patrols, improved access to previously unstable areas and drone technology.

These methods helped conservation teams assess wildlife numbers across areas that can be difficult to monitor.

Nevertheless, the recent anthrax deaths highlight how disease can threaten progress even when population numbers are improving.

Why Hippos Are Important to Virunga’s Ecosystem

The significance of the outbreak extends beyond the number of individual animals lost.

Hippopotamuses play an important ecological role because they move between aquatic and terrestrial environments. They spend much of their time in water but travel onto land to feed, helping transfer nutrients between different parts of the ecosystem.

Virunga describes hippos as animals capable of influencing sediment, water flow and aquatic environments. Their grazing also affects vegetation around their habitats.

For this reason, ecology and veterinary experts have described them as ecosystem engineers.

Joel Mbusa Mapoli, an ecology and veterinary medicine expert quoted by Al Jazeera, explained that hippos influence nutrient flows and ecological conditions within their habitats.

He also argued that protecting the species requires conservation and public-health measures to be considered together.

However, the current deaths should not automatically be interpreted as evidence of large-scale ecological disruption. There is no confirmed finding that the loss of at least 30 hippos has caused such an impact.

The concern is that repeated mortality could place additional pressure on a species that is still recovering from a much larger historical decline.

Why Anthrax Can Keep Returning in Wildlife Populations

One of the biggest challenges in controlling anthrax is the ability of its spores to persist in the environment.

Virunga officials have previously reported anthrax among hippos and other wildlife in the ecosystem.

Several environmental and ecological factors may influence the likelihood of outbreaks. These include persistent spores in soil, changing environmental conditions, concentrations of animals around water and grazing areas, and the difficulties involved in monitoring wildlife health across large protected landscapes.

Virunga has explained that when vegetation becomes scarce, herbivores may gather more closely around remaining grazing areas and water sources.

Such concentrations can potentially increase exposure to contaminated soil.

However, the available evidence does not establish one definitive cause for the 2026 outbreak.

Although significant rainfall coincided with the apparent reduction in newly identified cases, it would be inaccurate to claim that rainfall, drought or any other individual environmental factor directly caused the outbreak.

What has been confirmed is that laboratory testing identified anthrax and that the disease has affected wildlife in the Virunga ecosystem on multiple occasions.

Virunga National Park Faces Additional Conservation Challenges

Established in 1925, Virunga National Park is recognised by UNESCO as a World Heritage Site.

Covering approximately 7,900 square kilometres, or around 3,000 square miles, the park contains a wide range of habitats and ranks among Africa’s important protected wildlife areas.

However, conservation efforts have been complicated by prolonged instability in eastern Democratic Republic of the Congo.

Armed conflict, restricted access and security concerns have made it difficult for conservation teams to monitor certain areas.

Al Jazeera reported that Virunga has lost control of significant portions of its territory amid fighting involving the Congolese army and M23 forces.

These circumstances create additional difficulties for wildlife disease surveillance.

Teams need to reach affected locations, identify dead animals, collect relevant information and ensure that suspected carcasses are managed safely.

When access is restricted, those responsibilities become more challenging.

The recurrence of anthrax therefore adds another layer of complexity to an already difficult conservation environment.

How Authorities Are Responding to the 2026 Anthrax Outbreak

The response involves cooperation between conservation authorities, veterinary teams and local communities.

Following laboratory confirmation in September, the ICCN announced that a response protocol had been established.

The measures include monitoring the affected areas, documenting new wildlife deaths, coordinating the safe handling and disposal of carcasses and informing nearby residents about the potential dangers of contact with infected animals.

The community warnings are particularly important because people living around the affected areas may encounter dead wildlife or potentially contaminated environments.

The approach also reflects the One Health principle, which recognises that human health, animal health and environmental health are interconnected.

For Virunga, this connection is especially relevant because wildlife and surrounding communities share the same broader ecosystem.

Preventing exposure among people and domestic animals is therefore an important part of the conservation response.

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Conclusion: Virunga’s Hippo Recovery Faces Another Test

The anthrax outbreak in Virunga National Park represents another challenge for a hippopotamus population that has already endured decades of decline and repeated disease-related losses.

At least 30 hippos had died from laboratory-confirmed anthrax by November 5, 2026, following the discovery of carcasses along the Semuliki River. The previous year’s outbreak had killed approximately 65 hippos, making the latest development particularly significant.

There is, however, a cautiously encouraging update: no new cases had been identified for approximately two weeks, according to Virunga’s conservation leadership. Authorities were continuing to monitor the situation and had not declared the outbreak over.

The February 2026 census, which recorded more than 2,700 hippos across 171 groups, including 153 calves, provides important context for understanding what is at stake.

For now, continued wildlife surveillance, responsible carcass management and public-health precautions remain essential as conservation teams work to protect the species and prevent further exposure.

Source and Research Disclaimer: This article has been prepared through research of the sources provided, including Virunga National Park, the Institut Congolais pour la Conservation de la Nature reports published through the Congolese Press Agency, ABC News, Al Jazeera, Nature and the World Health Organization. It reflects the information available in those sources as of November 5, 2026. Reported wildlife mortality figures and outbreak assessments may change as monitoring and investigations continue. The article does not imply independent verification beyond the information supported by the cited material.

Sources

• Virunga National Park: Hippopotamus Population Shows Signs of Recovery in 2026
• Virunga National Park: Hippopotamus conservation and population information
• ABC News: Anthrax outbreak in Virunga kills at least 30 hippos
• Nature: Anthrax outbreak kills hippos in the Democratic Republic of the Congo
• Institut Congolais pour la Conservation de la Nature report via ACP on the Semuliki River deaths
• ACP report on the September 2026 anthrax confirmation in Semuliki
• Al Jazeera: Anthrax outbreak in DR Congo’s Virunga National Park
• WHO: Anthrax response in the Democratic Republic of the Congo
• WHO: Scaling up response to anthrax outbreak in the Democratic Republic of the Congo

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