Bt Byproduct Found In Human Blood

From India Today:

Fresh doubts have arisen about the safety of genetically modified crops, with a new study reporting presence of Bt toxin, used widely in GM crops, in human blood for the first time.
Genetically modified crops include genes extracted from bacteria to make them resistant to pest attacks.
These genes make crops toxic to pests but are claimed to pose no danger to the environment and human health. Genetically modified brinjal, whose commercial release was stopped a year ago, has a toxin derived from a soil bacterium called Bacillus thuringiensis ( Bt).
Till now, scientists and multinational corporations promoting GM crops have maintained that Bt toxin poses no danger to human health as the protein breaks down in the human gut. But the presence of this toxin in human blood shows that this does not happen.
Scientists from the University of Sherbrooke, Canada, have detected the insecticidal protein, Cry1Ab, circulating in the blood of pregnant as well as non-pregnant women.
They have also detected the toxin in fetal blood, implying it could pass on to the next generation. The research paper has been peer-reviewed and accepted for publication in the journal Reproductive Toxicology. The study covered 30 pregnant women and 39 women who had come for tubectomy at the Centre Hospitalier Universitaire de Sherbrooke (CHUS) in Quebec.
None of them had worked or lived with a spouse working in contact with pesticides.
They were all consuming typical Canadian diet that included GM foods such as soybeans, corn and potatoes. Blood samples were taken before delivery for pregnant women and at tubal ligation for non-pregnant women. Umbilical cord blood sampling was done after birth.

I'm not sure what to make of this.  I think it falls in with the concerns of Don Huber at Purdue, about potential sterility in livestock fed Roundup GM corn.  I think there probably ought to be a number of research projects funded to look into it, but I don't know that any results will satisfy the seriously anti-GM anti-Monsanto folks.  I wouldn't think Bt itself would be very serious, since organic gardeners use it as an insecticide, but this is well outside of my area of expertise (breaking things).