Nation ‘Brain-eating amoeba’ cases peak in the summer: What to know about Naegleria fowleri symptoms June 14, 2023 Isabelle Butera, USA TODAY Comments Off on ‘Brain-eating amoeba’ cases peak in the summer: What to know about Naegleria fowleri symptoms With less than 10 cases per year, it's unlikely you'll be infected by Naegleria fowleri, a brain-eating amoeba found in freshwater.