Paralyzing polio-like illness is striking more U.S. kids

(10tv.com - A rare condition that causes paralysis is on the rise in American children, health officials reported this week.

“We do have an uptick in cases of acute flaccid myelitis in 2016. Fifty confirmed cases reported to us in 24 different states,” Centers for Disease Control and Prevention pediatrician Dr. Manisha Patel told CBS News.Manisha Patel told CBS News.Manisha Patel told CBS News.

Ninety percent of those cases are in children, said Patel, the acute flaccid myelitis team lead at the National Center for Immunization and Respiratory Diseases at the CDC.

More commonly referred to as AFM, health officials said it can occur as a result of a variety of germs includingenteroviruses, West Nile virus and adenoviruses. It affects the nervous system, primarily the spinal cord, and its symptoms are likened to those caused by polio (which was eradicated in the U.S. thanks to the polio vaccine).

In the second half of 2014, the CDC received an increase in reports of AFM across the United States – 120 cases between August and December that year. In 2015, the number of cases dropped to 21, but now they’re back up again.

“The CDC is concerned about the increase in cases, so we’re actively investigating the cases and working really closely with health departments on it. We’re intensifying our efforts to find out what causes it – we don’t know what causes it,” said Patel.

Sudden limb weakness is a telltale sign of the illness, said Patel. “Children present pretty acutely within the first couple of days,” she explained, saying a limp might signal the condition.

In addition to weakness and loss of muscle tone and reflexes, some patients may experience difficulty moving their eyes, drooping facial muscles and eyelids, difficulty swallowing and slurred speech. Urination may be difficult. The most severe symptom of AFM is respiratory failure if the muscles involved in breathing weaken.

Scientists at the CDC are testing blood, nose, respiratory, and spinal cord specimens from patients to learn more and try to identify the source.

“We are looking at it quite broadly to better understand what might be causing it and why kids are coming down with this,” Patel said.

While cases are on the rise, Patel noted that AFM is still very rare, affecting less than one in a million people.