IN 2011, a 15-year-old girl from Madurai was admitted to hospital for diabetes ketoacidosis. It is a life-threatening condition that develops when cells in the body are unable to get the sugar (glucose) they need due to the lack of insulin. Krishnan Swaminathan, an endocrinologist and president of the Coimbatore-based Kovai Medical Centre and Hospital, saw that the girl was not responding to treatment. “We reinvestigated the case and found high residues of an organophosphate (OP) insecticide in her blood and urine samples. When we asked her parents, they told us she had consumed the insecticide because she had scored less marks in her school examination,” he says. Derived from phosphoric acid, OPs are a popular class of pesticides. They are also notorious as the poison chosen by farmers to commit suicide. Around the time, the case of a 12-year-old boy suffering from a similar condition was reported from Mysuru, Karnataka. The boy had eaten tomatoes from a field without washing them ...