Dr Chant was the subject of a thinly veiled Facebook death threat by the group No Fluoride Australia this week. They have also put out a wanted poster of Dr Chant complete with bullet holes.

"Expect to be threatened! The community is angry, it wouldn't surprise me if these criminals pretending to be authorties (sic) on health start going missing, eventually members of the public will snap and take matters into their own hands, its only a matter of time. People go missing over far more trivial issues," was posted on the Facebook page by No Fluoride Australia on September 12.

Last week Dr Chant was also threatened with sarin gas - the deadly chemical used in recent attacks in Syria - by anti-fluoride activists after she spoke at a heated Lismore Council meeting, which agreed to overturn a longstanding fluoride ban.