Key facts
- The Ebola outbreak in the Democratic Republic of the Congo has surpassed 4,000 confirmed cases.
- Health officials are concerned the virus may be mutating, citing unprecedented severity.
- Response efforts are being scaled up, including door-to-door searches for patients.
- The outbreak is the second-largest on record, with high community transmission.
- Antiviral treatment and vaccine efficacy trials are planned.
- Essential healthcare services, including childhood vaccinations, are being disrupted.
Health officials in the Democratic Republic of the Congo are concerned that the Ebola virus causing a massive outbreak may be mutating, as confirmed cases have now surpassed 4,000. The Africa Centres for Disease Control and Prevention (Africa CDC) stated that incremental actions are no longer sufficient and announced plans to significantly scale up all aspects of the response, including conducting door-to-door searches for patients.
The outbreak, caused by the Bundibugyo strain, was officially reported on May 15, though suspicions suggest it may have been spreading since January. As of August 4, the DRC's national public health institute recorded 3,973 cases and 1,801 deaths. Dr. Jean Kaseya, director general of the Africa CDC, confirmed on Thursday that cases had exceeded 4,000, making this the second-largest Ebola outbreak on record. The current outbreak shows eight times more cases and six times more deaths than were recorded at the same stage of the 2014-18 West Africa Ebola outbreak.
Dr. Kaseya indicated that discussions with the World Health Organization's Director-General, Dr. Tedros Adhanom Ghebreyesus, are underway to conduct studies to assess potential virus mutation and other issues, given the outbreak's unprecedented severity. A significant portion of deaths, over two-thirds, are occurring within communities rather than treatment centers, and a high percentage of patients admitted to treatment facilities are not on official contact lists, suggesting widespread untracked transmission. Contact tracing efforts are deemed insufficient, with only about 10 contacts identified per patient, far below the expected 40.
Ebola, a viral hemorrhagic fever, causes symptoms such as vomiting, diarrhea, organ damage, and internal bleeding. The outbreak is concentrated in the conflict-affected mining province of Ituri but has spread to other provinces and neighboring Uganda, which has since brought its outbreak under control. Response teams plan to transition from contact tracing to an active case search, involving community health workers visiting households. Officials also plan to use the antiviral remdesivir on a compassionate use basis and will investigate the efficacy of the Ervebo vaccine, licensed for a different strain, against the Bundibugyo strain, especially after data suggested it caused less severe disease and no deaths in vaccinated individuals.
DRC authorities are also investigating a suspected Ebola death on a boat traveling to the capital, Kinshasa, with other passengers to be quarantined and tested. Unicef has warned that the outbreak is disrupting essential healthcare, with families avoiding clinics due to fear of infection and service disruptions. In the mining town of Mongbwalu, a central point of the outbreak, the rate of children receiving their first measles dose has dropped by 69%.