NAIROBI, Kenya — Marathon runner Rita Jeptoo's "B" sample tested positive, Kenya's athletics federation said Friday, confirming an earlier test that found traces of a banned performance enhancer.
Jeptoo is a three-time winner of the Boston Marathon and two-time winner in Chicago. She is one of the highest profile Kenyan athletes to fail a doping test.
Tests of the "B" sample were conducted between Wednesday and Friday at the World Anti-Doping Agency lab in Lausanne, Athletics Kenya said. The federation said in a statement that it will hold a hearing of Jeptoo's case early January.
David Okeyo and Jackson Tuwei, who are vice presidents of Athletics Kenya, had said in November that Jeptoo's "A" sample taken in an out-of-competition test in Kenya on Sept. 25 showed traces of the blood-booster EPO.
The 33-year-old Jeptoo claimed her second straight title in Chicago on Oct. 12. She was set to be crowned winner of the World Marathon Majors series before it was revealed that she had failed a doping test.
Earlier Friday the head of Kenya's athletics federation had said the doping problem in his country is far less severe than in Russia or China.
Athletics Kenya President Isaiah Kiplagat said the federation has banned or suspended 32 athletes for doping in the past five years.
"If you compare that to athletes banned by other federations like Russia and China, we are nowhere," he said.
