Case Report Data & Graphs
Three confirmed cases of Naegleria fowleri were reported in 2022. These illnesses occurred after exposure to freshwater in Iowa, Nebraska, and Arizona.
N=157; Year of exposure unknown for one case
Case Reports by Year [XLS – 22 KB]
N=157; median age=11; 77.1% male
Case Reports by Age Group and Gender [XLS – 17 KB]
N = 146
*Aquatic venues are artificially constructed structures or modified natural structures where the general public is exposed to water intended for recreational or therapeutic purpose. Examples include swimming pools, interactive water play venues/water playgrounds (such as splash pads and surf parks), and hot tubs. CDC and its state and local public health partners have identified PAM cases linked to inadequately operated aquatic venues (for example, consistently unable to detect chlorine in the water). However, CDC is not aware of any PAM cases linked to well-operated aquatic venues.
** Water was forced up the nose during use.
Month of illness onset unknown for 11 cases. Of those case reports missing the month of exposure, probable water exposures included lake, pond, reservoir (N =5), unknown/multiple (N=5), and geothermal water (N=1)
Case Reports by Month of Illness Onset and Probable Water Exposure [XLS – 24 KB]