2016 Rio Olympic Games

"Many [threats] are discarded and the ones that deserve attention are investigated exhaustively," the agency said.

According to lead researcher Renata Picao, the "super bacteria" entered the city's waterways when sewage coming from local hospitals got channeled into the bay.

"We have been looking for 'super bacteria' in coastal waters during a one-year period in five beaches," Picao told CNN during a visit to her lab. "We found that the threats occur in coastal waters in a variety of concentrations and that they are strongly associated with pollution."

The news comes as Rio prepares to host hundreds of thousands of athletes and tourists during next month's Summer Olympics.

Paes, who, as Mayor, is the head of the Municipal Government which is a separate entity to the State authorities, particularly criticised their failure to deal with violent crime. 

"This is the most serious issue in Rio and the state is doing a terrible, horrible job," he told CNN.

"It's completely failing at its work of policing and taking care of people."

This follows a tumultuous week during which striking police held up signs at the city's main airport welcoming tourists "to hell", before human body parts were washed-up on Copacabana Bay.

A beach goer Wednesday discovered mutilated human body parts that had washed up on the shore, right in front of the Olympic Beach Volleyball Arena on Rio's famed Copacabana beach.

A dismembered foot and another body part still unidentified was found, according to Andre Luiz, an officer of the Military Police. Police believe the victim was a woman or young adult.

Taylor’s compatriots Rory McIlroy and Shane Lowry are among a number of top golfers to have withdrawn due to the mosquito-borne disease, which causes babies to be born with small heads and under-developed brains and can also cause miscarriages, premature birth and vision problems in babies.

World number one Jason Day has provided the biggest blow yet to the golf tournament at this year's Olympic Games in Rio de Janeiro after he announced yesterday he will not compete because of fears over Zika.

A number of top players, including Ireland's world number four Rory McIlroy, have decided not take to part in the tournament at Rio 2016. 

He is part of a long list of leading golfers to withdraw which also includes his team-mate Graeme McDowell, South Africans Branden Grace, Louis Oosthuizen and Charl Schwartzel, Australia’s Marc Leishman and Adam Scott and Fiji’s Vijay Singh.

Another Australian, the world number one Jason Day, has also admitted that he may withdraw.

The International Association of Athletics Federation (IAAF) decided not to lift the suspension, imposed after accusations of state-sponsored doping.

Individual athletes can compete as neutrals if they prove they are clean.

The Russian president called on other bodies, including the International Olympic Committee (IOC), to intervene.

The IOC executive board said it would hold a telephone conference on Saturday to discuss the issue ahead of a full IOC summit in Lausanne on Tuesday.

The statement came as worry mounted that the mosquito-borne virus, which has spread across much of Latin America and which can lead to severe birth defects in babies, might spread further when the Olympics begin in August.

"The Committee concluded that there is a very low risk of further international spread of Zika virus as a result of the Olympic and Paralympic Games as Brazil will be hosting the Games during the Brazilian winter," the WHO said.

The global health agency explained that the intensity of the transmission of viruses like dengue and Zika "will be minimal".

Pini has so far qualified with a B timing and is aiming for an A qualifying time, which will be around the time that will make semifinals at the Olympics.

Pini told Loop PNG that this will solidify his selection but mostly he wants to ensure that he is going to Rio as a top qualified athlete, pushing himself as hard as he can.

He gained 3 Olympic B Qualifying times in the 100m butterfly, 100m freestyle and 100m backstroke.

“I am aiming for the 100m butterfly as my main event.