All 1,848 athletes entered at the world athletics championships have been blood-tested in an unprecedented anti-doping measure, the ruling body IAAF said on Saturday, reported dpa.
The IAAF said in a statement that the samples of the athletes competing at the August 27-September 4 championships were taken over 17 days.
The IAAF is testing every athlete for the first time as part of its blood passport programme to detect substance abuse.
"We are absolutely delighted at the success of this project. It was certainly an ambitious programme ... A fantastic milestone has been achieved," said IAAF president Lamine Diack.
"The IAAF is proud of its total commitment to the fight against doping in athletics and this initiative will stand us in very good stead as we re-double our efforts going forward."
Testing at the worlds include 500 competition urine tests during the nine-day championships. No positive test has been reported so far.