Brazil Rules Out Ebola Cases in Two Travelers Returning from Africa

What happened

Health authorities in Brazil have officially ruled out Ebola as the cause of illness for two individuals who were being monitored in the country's major urban centers. The patients were placed under surveillance after returning from African nations currently experiencing viral outbreaks and presenting symptoms consistent with the disease.

What's new in this update

Official diagnostic testing confirmed that both patients are negative for the Ebola virus. A 37-year-old man in São Paulo, who had recently traveled to the Democratic Republic of Congo, was instead found to have meningitis. A second patient in Rio de Janeiro, a Belgian national who had visited Uganda, tested positive for malaria.

Key details

The patients exhibited a range of symptoms including fever, cough, chills, and diarrhea. Had these cases been confirmed, they would have represented the first instances of the current outbreak reaching beyond the African continent. This particular outbreak is driven by the Bundibugyo strain, which is fatal in approximately one-third of cases and lacks a proven vaccine or treatment.

Background and context

The Democratic Republic of Congo is currently reporting over 1,000 suspected Ebola cases with 246 confirmed deaths, concentrated in the Ituri, North Kivu, and South Kivu provinces. Uganda has also reported nine confirmed cases and one death. The virus typically spreads via direct contact with bodily fluids or through the handling of infected animals, such as fruit bats.

What to watch next

While these specific cases were cleared, the global medical community is accelerating the development of three new vaccines specifically targeting the Bundibugyo strain. These efforts are being led by the University of Oxford, Moderna, and the International Aids Vaccine Initiative to prevent further international transmission.