The International Olympic Committee ruled out conducting viral tests of Rio de Janeiro's sewage-laden waterways ahead of the 2016 games, a top official said Wednesday, despite an Associated Press study showing dangerously high levels of disease-causing viruses at all aquatic venues, with experts saying athletes are almost certain to be exposed to pathogens.

Speaking at a news conference in Rio de Janeiro dominated by questions about Rio's sewage pollution problem, Olympic Games Executive Director Christophe Dubi said the IOC will stick to World Health Organization guidelines recommending only bacterial testing.

The AP's independent analysis of water quality showed high levels of viruses and, in some cases, bacteria from human sewage in Rio's Olympic and Paralympic water venues.

In two separate e-mailed statements following the AP's July 30 publication about its study, the World Health Organization said it was advising the International Olympic Committee "to widen the scientific base of indicators to include viruses."

However, in an e-mailed statement Monday, the organization backpedaled and said that "WHO has not and will not issue an 'official recommendation' on viral testing."

"WHO is very clear that bacterial testing is what should be followed," Dubi said. "It is the best measure to be used."

Basketball

James uncertain about Olympics

LeBron James said his health and his family will determine whether he tries for a record third men's basketball Olympic gold medal next summer.

James took part in USA Basketball's minicamp Wednesday, making himself eligible for the 2016 roster. James could join Carmelo Anthony and Chris Paul as the only three-time gold medalists, and he and Anthony would be the first Americans to appear in four Olympics.

James says he's "not penciling it in, as of now, for next summer" and that all decisions go through his family.

Women's SOCCER

Olympic qualifier to be in U.S.

The World Cup champion U.S. women's national team will get home-country advantage early next year in the bid for a spot in the Rio Olympics.

CONCACAF, the governing body of soccer in North and Central America and the Caribbean, announced that its Olympic qualifying would be held Feb. 10-21 in the Dallas area and Houston.

The top two finishers earn a spot in the 2016 Olympics in Brazil.

Olympics

L.A. likely to bid for 2024 Games

If the United States is going to bid for the 2024 Olympics, that bid will come from Los Angeles.

After a hastily called board meeting Wednesday, U.S. Olympic Committee CEO Scott Blackmun said he was optimistic the USOC could work out a plan to make Los Angeles the bidder. He said he hoped the decision would be official by the end of the month.

The news comes two weeks after the USOC dropped a Boston bid that was short on support. The U.S. hasn't hosted a Summer Olympics since 1996 in Atlanta.

AROUND THE HORN

College football: BYU tight end Colby Jorgensen is recovering from surgery after he fractured and dislocated his neck in practice. He will miss the rest of the season.

Men's soccer: Costa Rica national team coach Paulo Wanchope resigned after he was involved in a fistfight at a match in Panama. Video showed the coach, who was a spectator, landing a punch on a man during a dispute over refereeing.

Women's tennis: Ukrainian qualifier Lesia Tsurenko upset Wimbledon finalist Garbine Muguruza 7-5, 6-1 in the WTA Tour's Rogers Cup in Toronto. Muguruza is ranked ninth in the world.

NEWS SERVICES