Case Report Data & Graphs

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Case Reports by Year
Case Reports by Age Group and Gender

Case Reports by Month of Illness Onset and Probable Water Exposure

Number of Case Reports of Primary Amebic Meningoencephalitis by Year — United States, 1962-2020

N=151; Year of exposure unknown for one case

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Number of Case Reports of Primary Amebic Meningoencephalitis by Age Group and Gender — United States, 1962-2020

N=151; median age=12; 76.2% male

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Number of Case Reports of Primary Amebic Meningoencephalitis, by Month of Illness Onset and Probable Water Exposure — United States, 1962–2020

N=140
*Recreational water contained in a manufactured setting that has undergone a systematic disinfection process (e.g., chlorination and filtration). This includes water in swimming or wading pools, fountains, spas, and artificial whitewater 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)

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Page last reviewed: August 30, 2021

Content source: Centers for Disease Control and Prevention, National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), Division of Foodborne, Waterborne, and Environmental Diseases (DFWED)