Last week Xstrata Mount Isa Mines, Mount Isa City Council and the Queensland Government were served a notice of claim in relation to the alleged lead poisoning of the child.

On August 8, Sharlene Body sent a hair sample from Sidney to a United States laboratory to uncover the full extent of metal poisoning in his blood.

The tests to be performed on his hair at the Doctor Data Laboratory in Illinois were similar to those which uncovered 19 toxins and minerals including arsenic, copper and aluminium in six-year-old Stella Hare - another Mount Isa child for whom a legal case was lodged earlier this year.

Ms Body was made aware of the hair sample results yesterday morning during a doctor’s appointment by phone to Sydney, however lawyer representing Sidney, Damian Scattini, said there would be no comment issued on the matter.

“Last week we served the three parties under the Personal Injuries Proceedings Act and they have 28 days to respond,” Mr Scattini said.

“We will not be issuing comment on the results until after that time.”

Last week Mr Scattini said Sidney was “exhibiting all the signs of classic lead poisoning” that led to “mental and gross retardation and nerve damage".

He said a check of Sidney's home, where he has lived since last year, had found dust containing lead, arsenic, cadmium and antimony.

Mr Scattini said the Environmental Protection Authority had failed the Mount Isa community.

“In layman's terms we are suing the Environmental Protection Authority for being the mining giant's lapdog rather than the community's watchdog which is its job,” he said.