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LONDON - New tests reveal Ukrainian presidential candidate Viktor Yushchenko's blood contains the second-highest level of dioxin poisoning ever recorded in a human - more than 6,000 times the normal concentration, according to the expert analyzing the samples.
Abraham Brouwer, professor of environmental toxicology at the Free University in Amsterdam, where the blood samples were sent for analysis, said they contained about 100,000 units of dioxin per gram of blood fat.
However, the concentration could prove to be even higher, or lower, once results are in this week from a more definitive test, said Arnold Schechter, a specialist in dioxin analysis from the University of Texas Southwestern Medical Center in Dallas.
The test also will show how long Yushchenko may show symptoms from the poison.
Brouwer's team has narrowed the search from more than 400 types of dioxin to about 29 and is confident they will identify the poison by week's end. That, in turn, could provide clues to its source.
Experts say Yushchenko, whose face has been pockmarked and disfigured, has probably experienced the worst effects already and should gradually recover, with no impairment in his working ability.