Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

The taxonomic importance of obligate heteroxeny: distinction of Hammondia hammondi from Toxoplasma gondii– another opinion

Abstract

We enumerate identical and divergent findings concerning the obligate heteroxenous Hammondia hammondi and the facultatively homoxenous or heteroxenous Toxoplasma gondii. Differences exist in life-cycles, transmission, and host range, especially transmissibility to birds and mammals other than rodents, in ultrastructural morphology, immunity and serology in cats and to lesser degree in rodents, in DNA sequences and in isoenzymes. Because the recognition of obligate heteroxeny is essential to study these organisms and to recognize them as taxa, it is advantageous to give heteroxeny a generic rather than a specific value. Characterization of organisms with the life-cycle patterns of Hammondia, Sarcocystis, Frenkelia, and Toxoplasma is best achieved by means of the genera presently used.

This is a preview of subscription content, log in to check access.

Author information

Additional information

Received: 27 March 2000 / Accepted: 20 April 2000

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Frenkel, J., Dubey, J. The taxonomic importance of obligate heteroxeny: distinction of Hammondia hammondi from Toxoplasma gondii– another opinion. Parasitol Res 86, 783–786 (2000). https://doi.org/10.1007/s004360000261

Download citation

Keywords

  • Host Range
  • Toxoplasma Gondii
  • Divergent Finding
  • Ultrastructural Morphology
  • Taxonomic Importance