A total of 252 cases of disorder known as acute flaccid myelitis are being investigated throughout the country, with a rise of 33 last week.
As a result of the sharp increase in children with arms paralysis or legs in the United States, health officials on Tuesday said they were investigating whether a virus or an automatic disorder could be a case.
A total of 252 cases of acute flaccid myelitis (MFA) are being investigated throughout the country, from 33 since last week, said Nancy Messonnier, director of the National Center for Immunization and Respiratory Diseases at the Control Center. and Prevention of Diseases (CDC).
With 80 cases confirmed so far this year, 2018 seems to be as fast as previous years as of 2014 (120 cases) and 2016 (149 cases), compared to Messonnier.
Since 2014, the year the syndrome came to an end, over 400 cases were confirmed through laboratory tests.
About a dozen cases were registered in 2015 and 2017.
Messonnier said he understood the parents' alarm, but stressed that disorder remains "rare" in terms of frequency.
The majority of cases occur in children between two and eight years of age. Almost everyone had suffered respiratory disease and respiratory diseases for three to ten days before having parasites in their arms or legs suddenly.
In some children, the paralysis disappeared later, but at least half had no recovery, says Messonnier.
The center analyzed 125 samples of spinal fluid and half of them were proven positively for rhinofirus or enterovirus, which often produces symptoms such as fever, red nose, vomiting, diarrhea and pains physical.
However, scientists are still spoiled for the precise cause of sudden paralysis, as these viruses are common, but MFA is not.
"We're trying to find out what triggers could cause someone to develop MFA," said Messonnier to reporters.
"It could be one of the viruses that we've already found, it can be a virus that we have not yet found, or it might be the virus that causes a process another operating MFA, through an automatic process, "he said.
"The CDC is an agency driven by science, and science does not give us a solution," he added.
Perhaps the most frustrating thing for parents is that there is no way to stop, or specific therapies or interventions.
"Parents and carers are encouraged to ask for immediate medical attention for a child who develops the sudden weakness of the arms or legs," it is written in the latest CDC report on the MFA, which will be announced on Tuesday.
Messonnier said that the CDC has not followed all MFA cases since 2014, which has created some gaps in the federal agency's agency of the disease, which experts are now trying to solve.
A child died with an MFA in 2017, he said the report.