CBC News has learned that three cases of a rare, polio-like disease have presented at the London Health Sciences Centre’s (LHSC) Children’s Hospital since early September.
The disease, acute flaccid myelitis (AFM) is a sub-type of another rare but serious neurological illness called acute flaccid paralysis (AFP), according to Dr. Adam Kassam, a senior resident physician in physical medicine and rehabilitation at Western University.
Over time, AFM can cause muscle weakness, trouble swallowing and, in severe cases, respiratory failure, he said.
“It’s still a vastly rare presentation of illness, but it does provoke some concern based on the frequency, relatively soon over the past couple of months,” said Dr. Kassam.
A spokesperson for LHSC said over email due that to privacy reasons, they cannot disclose the status of those three patients.
Incidents of the disease have increased in the U.S. this year, with more than than 60 cases confirmed and another 65 currently under investigation, according to the Centers for Disease Control and Prevention.
Since September, the Hospital for Sick Children in Toronto has also seen an increase in patients with symptoms typical of AFP, namely muscle weakness and a preceding viral illness, according to associate pediatrician-in-chief Dr. Jeremy Friedman.
The Middlesex-London Health Unit says there have been no reports of AFM in London or Middlesex County, which means the patients would likely have come from other public health jurisdictions.
The health unit considers AFP a disease of public health significance, and confirmed or suspected cases of the illness must be reported as soon as possible.
‘Rare but serious’
“This is something that’s relatively rare, but affects children, and so this is something we should be concerned about as a community,” he said.
Kassam said parents should watch out for symptoms including sudden weakness and an inability to move a limb. AFM usually presents in just one side of the body, and tends to target the legs more so than the arms, he said.
There is no specific treatment for the illness, and kids who get AFM are primarily helped through physical therapy and adaptive solutions like wheelchairs or crutches once they’re medically stable, Kassam said.
“If [parents] do have a suspicion about their child suffering from weakness that is unexplained, or it happened suddenly, then they should go to their doctor or go to their emergency room as soon as they can,” he said.