BBC News reports that thousands of people in Sri Lanka have been struck by a mysterious and deadly form of kidney disease. Most of them are rice farmers. A new study points to a likely cause - pesticides and fertilisers.
"Four years ago, the World Health Organization (WHO) and the government of Sri Lanka launched a joint investigation into its causes.
Scientists tested people and the environment. They took blood, urine, and tissue samples and tested the region's food, water, and air.
The results, released this summer in a one-page press release, suggested that the culprits were two toxic metals - cadmium and arsenic - contaminating food and the air.
Relatively high levels of the metals showed up in the blood and urine of people in the North Central Province, says Palitha Mahipala, an official with the Sri Lankan Ministry of Health.
Although the levels were generally within what is considered the safe range, Mahipala says that continuous exposure to those levels may have been damaging.
"Probably the chronic exposure would have been the reason for this," he says.
But if arsenic and cadmium are to blame, where are they coming from?
The new study blames farm chemicals, which are cheap in Sri Lanka, thanks to government subsidies, and often overused.
Cadmium is found in some fertilisers. Arsenic is an active ingredient in some pesticides.
Companies that import and sell pesticides and herbicides contest the government's conclusion. They point out that the government and WHO have not yet released their full study.
"We believe the evidence is not scientific enough to say that the pesticide is the main reason for this chronic kidney disease," says Senarath Kiriwaththuduwage, research and development manager at Crop Life Sri Lanka, an industry trade association.
The WHO says it will publish the study in the coming months, but are still finalising details.
Some doctors and scientists familiar with the study agree that more research needs to be done, but many believe that farm chemicals are at least partly to blame for CKDu."
Follow the link to read the full article - we will await the full report.
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