A new link has been found between breast cancer and pesticides.
Women with breast cancer are at least five times more likely to have residues of
the pesticide DDT in their blood than those who do not, according to Belgian
doctors.
They looked for levels of two pesticides - organochlorines
(DDT), which contain oestrogens, and hexachlorobenzene (HCB) - in the blood of
the two groups.
When DDT breaks down, it forms another chemical, DDE, which
behaves like the female hormone oestrogen.
Dr Charles Charlier, a toxicologist at Sart Tilman Hospital,
Liege, says in the journal Occupational and Environmental Medicine today that
women diagnosed with breast cancer are more than five times more likely to have
DDT residues and nine times more likely to have HCB residues in their blood than
the control group.
DDT was banned in most developed countries following a lead by
America in 1972 but research has shown that it can remain active in tissues for
50 years. HCB continues to be used.
Dr Charlier's work was based on 600 women in Belgium referred
for suspected breast cancer. Of these, 159 had the cancer and agreed to have
their blood analysed for the research.
He calls for more research into how humans might be exposed to
organochlorines, particularly by eating foods that have been treated with
pesticides.
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