That was the prevailing opinion, albeit agricultural chemicals. But, some additional research has been done and a study is about to be published that proposes an alternative theory.
Is it conclusive? I don't think so. But, discounting it simply because the "consensus" pins the blame on agricultural chemicals is like saying that "anthropogenic climate change" is "settled science".
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My dad has problems with his bladder and frequently experiences bladder infections.
His doctor has told him that most of the problems he is experiencing could be eliminated if he would drink about 96oz. of water everyday. That is about 12oz every 90 minutes but dad forgets to chug it down.
I wonder if the problem in Central America is due to a combination of events: not enough hydration to flush out residue combined with chemical exposure not normally a problem except if it builds up in the system.
It will be interesting to find out what the problem really is.