With SwimNews. Brazil's backstroke sprinter Fabiola Molina has been forced to withdraw from the world championships in Shanghai next month after receiving a two-month anti-doping ban following a positive test for a banned stimulant.

The 36-year-old tested positive for methylhexaneamine during an event in Rio de Janeiro in April, the Brazilian swimming federation (CBDA) confirmed in a statement.

The CBDA said it had taken into account "the athlete's history and the fact that it was clear that there was no intention to enhance her performance" and imposed a two-month ban, starting on May 8, the date of her last race. That would allow a July 8 return, in time for Shanghai. However, Molina's ban includes loss of the result that qualified her for world titles.