Mysterious paralyzing illness found among kids in 22 states, including Md.

NEW YORK (AP) — U.S. health officials on Tuesday reported a jump in cases of a rare paralyzing illness in children, and said it seems to be following an every-other-year pattern.

At least 62 cases have been confirmed in 22 states this year, and at least 65 additional illnesses in those states are being investigated, according to the Centers for Disease Control and Prevention. Similar waves of the same illness occurred in 2014 and 2016.

CDC officials say they haven’t found the cause. Some possible suspects, such as polio and West Nile virus, have been ruled out. Another kind of virus is suspected, but it’s been found in only some of the cases.

Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, told WTOP that the disease’s cause can be possibly associated with a reaction following infections, particularly respiratory infections.

“This is a mystery so far,” the CDC’s Dr. Nancy Messonnier said in a call Tuesday with reporters.

About 90 percent of the cases are children who have suffered muscle weakness or paralysis, including in the face, neck, back or limbs. The symptoms tend to occur about a week after they had a fever and respiratory illness.

It is “a pretty dramatic disease,” but fortunately most kids recover, Messonnier said.

Health officials call the condition acute flaccid myelitis. The CDC would not release a list of the states reporting probable or confirmed cases. But some states have previously announced clusters, including Minnesota, Illinois, Colorado, New York and Washington. Five possible cases are under investigation in Maryland, a Maryland Department of Health spokesman told NBC Washington.

The cases in 2014 and 2016 were partly attributed to particular strains of respiratory germs called enteroviruses, which spread the most in the summer and fall.

Fauci said that although the cause of the disease is unknown, there are some ways to reduce the chance of getting it. “The one thing to do is what we always do when talking about preventing the spread of viruses: keep up on your vaccinations, wash your hands and stay away from situations in which you have a lot of sick people sneezing and coughing.”

Most people infected with enteroviruses suffer only minor symptoms like cough and runny nose. And though enteroviruses have been detected in some paralysis cases, it hasn’t been found in others, CDC officials say.

Lacking an established cause, health officials confirm cases through a review of brain scans and symptoms.

About 120 confirmed cases were reported in 2014. Another 149 were reported in 2016. In 2015 and 2017, the counts of reported illnesses were far lower.

The cases this year seem to be spread across much of the country, as were the earlier two waves. But mysteriously no other country has reported the emerging every-two-years pattern seen in the U.S., Messonnier said.

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