In 2014, researchers from the Oswaldo Cruz Institute found traces of the bacteria Klebsiella pneumoniae carbapenemase (KPC) in samples taken from Flamengo Beach, which is capable of causing urinary, gastrointestinal and pulmonary infections and often sends victims to hospital.
It was found close to the Marina de Gloria on Guanabara Bay, where sailing competition is due to be held at the Olympics.
Concerns have continued at the venue in the build-up to the Games, despite the clean-up of the Bay having been promised as a major legacy project.
