Even though N. fowleri amoebas are relatively common, they only rarely cause brain disease. N. fowleri disease, known as primary amoebic meningoencephalitis or PAM, occurs from zero to eight times a year, almost always from July to September. Worldwide, there have been some 400 reported cases. There have been 35 reported cases in the U.S. since 2001. Yoder and colleagues were able to identify 111 PAM reports in the U.S. from 1962 to 2008. However, some cases may be unreported. A study in Virgi
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How Frequently Do People Get Infected by Brain-Eating Amoebas?
