Naegleria andersoni n.sp., a cosmopolitan amoebo-flagellate, with two subspecies.

A new Naegleria species, N. andersoni, is described that occurs world-wide. The new species consists of two subspecies and can be distinguished from previously described species on the basis of antigenic, isoenzyme and restriction enzyme DNA fragment differences and in maximum growth temperature tolerated. N. andersoni is not pathogenic in experimental animals and shows no cytopathic effect in cell culture. The electrophoretic karyotype differs between strains of the species, and most of all between the two subspecies, N. a. andersoni and N. a. jamiesoni.