How worrying is the Ebola outbreak in DR Congo?

The Ebola outbreak in the Democratic Republic of Congo is alarming.

It has been spreading for several weeks without detection in a region fraught with civil unrest, complicating efforts to control the virus. The strain involved is rare, resulting in a limited arsenal of resources to combat a disease that has a fatality rate of between 30% and 50% among those infected.

At this pivotal moment, there is considerable uncertainty regarding the extent of the outbreak, with nearly 250 suspected cases and 80 reported deaths.

While most Ebola outbreaks tend to be relatively small, health experts remain wary of the extensive 2014-2016 Ebola epidemic, which affected 28,600 individuals in West Africa—the largest outbreak in history.

The World Health Organization's (WHO) declaration of a public health emergency of international concern should not be interpreted as an indication of a global epidemic akin to COVID-19.

Currently, the risk poses a minimal threat to global health. During the 2014-2016 outbreak, the UK reported only three cases, all of which were among healthcare workers who had volunteered to assist.

Dr. Amanda Rojek from the Pandemic Sciences Institute at the University of Oxford notes, "But it does reflect that the situation is complex enough to require international coordination."

Understanding the Bundibugyo Species

Ebola is a severe and lethal disease, albeit infrequent. The Ebola virus primarily infects animals, particularly fruit bats, and humans become infected through direct contact with the bodily fluids of these animals or infected individuals.

This current outbreak is attributed to the Bundibugyo species of Ebola, one of three known species linked to outbreaks, but it is relatively rare.

Previous incidents involving Bundibugyo occurred in 2007 and 2012, with mortality rates of 30% and 50%, respectively.

The Bundibugyo species presents notable challenges. Unlike other Ebola strains, there are no authorized vaccines or treatments available, although some experimental options exist.

Testing methods for confirming infection appear inadequate. In the early stages of this outbreak, initial results were negative for the Ebola virus, necessitating more advanced laboratory tests to establish Bundibugyo's involvement.

According to Professor Trudie Lang from the University of Oxford, addressing the Bundibugyo strain is "one of the most significant concerns" in this outbreak.

Symptoms and Treatment

Symptoms typically manifest between two and 21 days following infection.

Initially, symptoms resemble those of the flu, including fever, headache, and fatigue. As the disease progresses, it can lead to severe symptoms such as vomiting, diarrhea, and organ failure. Some patients may experience internal and external bleeding.

Given that there are no approved medications specifically targeting the Bundibugyo virus, supportive care is critical. This includes managing pain, treating other infections, and providing fluids and nutrition, with early intervention improving the chances of survival.

How the Virus Spreads

Ebola transmission occurs through contact with infected bodily fluids, such as blood and vomit, typically after symptoms have begun to appear.

The outbreak's first confirmed case involved a nurse who exhibited symptoms on April 24. It took three weeks to officially acknowledge the outbreak.

"Ongoing transmission has persisted for several weeks, and the outbreak has been detected very late, which is alarming," stated Dr. Anne Cori from Imperial College London.

This delay means that health officials are lagging in their efforts to contain the outbreak, with the WHO indicating that this could result in "a potentially much larger outbreak than what is currently being detected and reported."

Response and Containment Challenges

The primary strategy will be to swiftly identify infected individuals and their potential contacts.

Efforts will also focus on preventing Ebola from spreading within hospitals and other medical facilities, particularly when healthcare workers are dealing with highly infectious patients. Additionally, it is crucial to ensure safe burial practices for anyone who passes away from the virus, as their bodies remain contagious.

These undertakings will be complicated, given the number of confirmed cases, as well as taking place in the context of a conflict-affected region of DR Congo, which has over 250,000 displaced individuals.

As Professor Lang highlights, "Many of the affected areas are mining towns with highly mobile and transient populations. This mobility increases risk as people move between communities and across borders."

Nevertheless, DR Congo possesses significant experience in managing Ebola outbreaks. Dr. Daniela Manno from the London School of Hygiene & Tropical Medicine asserts that the response capabilities are "significantly stronger today than they were a decade ago."

Ultimately, the ability to contain this outbreak effectively or to avoid a recurrence of the extensive 2014-2016 crisis will hinge on the current response strategies.