Seven northeast Arkansas recreational lakes were examined for the presence of pathogenic and nonpathogenic Naegleria fowleri. Cultural differentiation and microscopic morphology were used as species determining tests, while mouse pathogenicity tests were conducted to determine virulence. Only one isolate met all criteria utilized for definite identification of Naegleria fowleri, although Naegleria type organisms were found in all of the lakes. None of the isolates were pathogenic in mice.
Evans, Robert Dean and Hinck, Lawrence W.
"Distribution of Naegleria fowleri in Selected Northeast Arkansas Lakes,"
Journal of the Arkansas Academy of Science: Vol. 34
, Article 15.
Available at: http://scholarworks.uark.edu/jaas/vol34/iss1/15