Sam, pictured with his mum Katie, needs 24/7 care and his family are in debt after the National Disability Insurance Scheme in Australia slashed funding. Photo / News Corp
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In 2010 at a mate's party, strapping 19-year-old rugby player Sam Ballard swallowed a garden slug as a dare.
A group of young friends was sitting around at a table drinking red wine when a slug was produced and one of them said: "Eat it, I dare you".
Sam swallowed the slug.
Prior to this, Ballard's mother Katie had thought her son as a "larrikin" but "invincible", that nothing could ever happen to him.
The worm is found in rodents, but snails or slugs can become infected when they eat the faeces of rats with the parasite, known as Angiostrongylus cantonensis. It is principally found in Southeast Asia, Australia and the Pacific.
While most people develop no symptoms, very rarely it causes an infection of the brain.
Sam contracted eosinophilic meningo-encephalitis, which many people recover from and which Sam initially seemed to be rallying.
But he then lapsed into a coma for 420 days and became a quadriplegic.
Sam's mother maintained a positive attitude and in late November 2011, posted her hopes on Facebook that Sam would "walk and talk again" and still had the same cheeky attitude.
But as Katie Ballard would later say of her son's life: "It's devastated, changed his life forever, changed my life forever. It's huge. The impact is huge."
When he was released from hospital in a motorised wheelchair three years after becoming ill, Sam had his mates rallying around him.
"Team Ballard" raised money for the 24/7 care that the young man would require, but it could never be enough.
Now aged 28, Sam suffers seizures and cannot control his body temperature, the Daily Telegraph reported.