Brazilian gymnast tests positive for doping

Former world champion gymnast Daiane dos Santos has tested positive for the drug Furosemide during an non-competition doping control.

The International Gymnastics Federation says on its Web site that Santos, the floor exercise world champion in 2003, had knee surgery this year and could have been given the drug by mistake. She tested positive in July.

Furosemide, a weight-loss drug, can be used as a masking agent for other banned substances.

Calls to Brazil's national gymnastics federation and Santos' home club were not immediately returned.

Santos, who faces a two-year ban, has until Nov. 13 to present a defense to the federation.