Primary Amoebic Meningoencephalitis (PAM) symptoms begin 1-9days after swimming or through other nasal exposure to water containing Naegleria fowleri. People die 1-12 days after symptoms begin; the median is just 5 days. Signs of symptoms of the infection are severe frontal headache, fever, nausea, vomiting, stiff neck, eventually followed by altered mental status, hallucinations, seizures and finally coma.
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