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Parasitol Res. 2002 May;88(5):443-50.

Development of a nested PCR assay to detect the pathogenic free-living amoeba Naegleria fowleri.

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  • 1Department of Microbiology and Immunology, Medical College of Virginia, Richmond 23298-0678, USA.


Naegleria fowleri is the causative agent of primary amoebic meningoencephalitis, a fatal disease of the central nervous system that is acquired while swimming or diving in freshwater. A cDNA clone designated Mp2C15 obtained from N. fowleri was used as a probe to distinguish N. fowleri from other free-living amoebae. The Mp2C15 probe hybridized to genomic DNA from pathogenic N. fowleri and antigenically related non-pathogenic N. lovaniensis. Mp2C15 was digested with the restriction enzyme XbaI, resulting in two fragments, Mp2C15.G and Mp2C15.P. Four species of Naegleria and four species of Acanthamoeba were examined for reactivity with Mp2C15.P. Mp2C15.P was specific for N. fowleri and was used in the development of a nested PCR assay which is capable of detecting as little as 5 pg of N. fowleri DNA or five intact N. fowleri amoebae. In summary, a rapid, sensitive, and specific assay for the detection of N. fowleri was developed.

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