Several new cases in New Brunswick involve caretakers of those afflicted, suggesting a possible environmental trigger

A whistleblower in the Canadian province of New Brunswick has warned that a progressive neurological illness that has baffled experts for more than two years appears to be affecting a growing number of young people and causing swift cognitive decline among some of the afflicted.

Speaking to the Guardian, an employee with Vitalité Health Network, one of the province’s two health authorities, said that suspected cases are growing in number and that young adults with no prior health triggers are developing a catalog of troubling symptoms, including rapid weight loss, insomnia, hallucinations, difficulty thinking and limited mobility.

One suspected case involved a man who was developing symptoms of dementia and ataxia. His wife, who was his caregiver, suddenly began losing sleep and experiencing muscle wasting, dementia and hallucinations. Now her condition is worse than his.

A woman in her 30s was described as non-verbal, is feeding with a tube and drools excessively. Her caregiver, a nursing student in her 20s, also recently started showing symptoms of neurological decline.

In another case, a young mother quickly lost nearly 60 pounds, developed insomnia and began hallucinating. Brain imaging showed advanced signs of atrophy.