Surveillance defines acute flaccid myelitis in children during EV-D68 outbreak

This surveillance report from the United States in 2014 defined acute flaccid myelitis (AFM) as a distinct clinical entity. The report focused on children across the country who presented with acute limb weakness. The definition emerged following observations made during an outbreak of severe respiratory disease caused by enterovirus D-68 (EV-D68).

No specific intervention, comparator, or primary outcome was reported in this surveillance data. The main finding was the clinical description and temporal association of AFM cases with the EV-D68 outbreak. Exact numbers for sample size, effect measures, and statistical significance were not provided.

Safety and tolerability data, including adverse events, were not reported. The report does not detail specific study limitations, but its nature as surveillance data means it is descriptive and observational. Funding sources and potential conflicts of interest were also not reported.

The practice relevance is that this report established a clinical case definition for AFM in the context of a viral outbreak. It serves as foundational epidemiology, alerting clinicians to a syndrome of acute limb weakness in children. The data highlight an association but do not establish a causal mechanism between EV-D68 and AFM.