A 10-year-old Australian boy has survived being bitten by one of the world's most poisonous spiders after being treated with 12 vials of anti-venom. It is thought to be one of the largest doses of anti-venom ever administered in Australia. <br/><br/>Matthew Mitchell was bitten on his finger by a funnel-web spider while helping his father clear out a shed. He suffered multiple seizures, dilated eyes and began frothing at the mouth.