International Olympic Committee (IOC) president Jacques Rogge said on Sunday that anti-doping efforts are effective at the Turin Winter Games.

The IOC is conducting about 1,200 tests at the 2006 Games, an increase of more than 70% over four years ago in Salt Lake City. So far, only one athlete has tested positive, Russian biathlete Olga Pyleva -- for the stimulant carphedon.

Before the Games Rogge made a plea to all participants to keep the quadrennial event clean.

"I am not disappointed," said Rogge, referring to his feelings when learning of the incident.

"The big number of tests conducted here had a deterrent effect, athletes are learning that it is always more difficult to cheat," he added.

The Games, however, have been overshadowed by police raids on the Austrian team amid suspicion of doping offense. The 10 Austrian athletes are still being investigated despite testing negative in initial tests.

"We have to fight doping with all we have," said Rogge.

The IOC chief said that testing was not the only way to determine guilt, as circumstantial evidence, such as telephone calls and e-mails, and the discovery of equipment could also suggest cheating.

Rogge said with increased testing and developed research, the Olympic movement was now on a par with what the scientists were offering up, but also warned against complacence.

"We believe that today we are on par with what science is giving us in terms of the capability of different drugs. We have narrowed the gap that existed a couple years ago very much," he said.

"Genetic doping might be a reality in five or 10 years time but today we are already preparing testing."

Source: Xinhua