Brain-eating amoeba: Primary amoebic meningoencephalitis. Naegleria fowleri life cycle stages. A: Cyst of N. fowleri in culture. Naegleria fowleri does not form cysts in human tissue. Cysts in the environment and culture are spherical, 7-15 µm in diameter and have a smooth, single-layered wall. Cyst

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Keywords: ameba, amebic, amoeba, amoebic, brain-eating, culture, cycle, cyct, cyst, cysts, deadliest, environment, form, fowleri, freshwater, health, human, infection, infectious, life, lifecycle, medical, medicine, meningoencephalitis, microscopic, naegleria, pathologic, primary, protist, stages, swimming, tissue, tsiaras