Ehresmann said Minnesota public health officials have linked their outbreak a virus, but haven't determined the exact name. She announced the numbers in a Tuesday media briefing.
Boston Children's Hospital has evaluated all of the confirmed and suspected AFM cases that occurred in MA this year.
NBC News had done its own unofficial survey of state health officials and found 87 confirmed or suspected cases in 26 states. In addition, officials do not yet know the long-term effects of AFM.
CDC Since August 2014, the CDC has seen 386 confirmed cases of AFM in the U.S. Outbreaks appear to follow an every-other-year pattern with another sharp rise in 2016, primarily in late summer and early fall. Polio was eradicated in the U.S.by vaccination. West Nile virus is also not a culprit, she said. Environmental agents, viruses and other pathogens are still being considered. He is an assistant professor and child neurologist at the Stanford University School of Medicine. The CDC knows of one child who died with the disorder in 2017.
"CDC has been actively investigating AFM, testing specimens and monitoring disease since 2014, when we first saw an increase in cases", Messonnier said. "And I'm frustrated that despite all of our efforts, we have not been able to identify the cause of this mystery illness". "We want to encourage parents to seek medical care right away if you or your child develops symptoms of AFM, such as sudden weakness and loss of muscle tone in your arms or legs".
There is also no official cause which means no definite form of treatment, something Roanoke mother Brittany Hoff knows too well after she said her son was diagnosed.
Ninety percent of patients are children. The study was published in the journal Developmental Medicine and Child Neurology.
As with any illness, parents should take their child into a doctor for treatment.
"We are just learning about this illness ourselves". "But a lot of kids are left with residual weakness, which can be from mild weakness in one arm or leg, or in some cases it can be severe to where they're unable to walk".
"In this cases it's unknown", Ehresmann said.
He stresses that the condition is still extremely rare with only one in a million children now diagnosed.
Despite its similarity to polio, none of the AFM patients has tested positive for the poliovirus, Messonnier said.
The CDC recommends that parents make sure their children are vaccinated, wash their hands regularly and use mosquito repellent when outdoors.
"Good advice now is good advice going into the influenza season", Dominguez said.