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The taxonomic status of the causative agent of heartwater

G R Scott1

  • 1Centre for Tropical Veterinary Medicine, University of Edinburgh, Roslin, Midlothian, United Kingdom.

The Onderstepoort Journal of Veterinary Research
|September 1, 1987
PubMed

Insights

A new classification of rickettsias uses numerical taxonomy to create the order Rickettsiales. This order includes three families and reclassifies Cowdria with Chlamydia and Coxiella.

Area of Science:

  • Microbiology
  • Taxonomy
  • Numerical Taxonomy

Background:

  • Rickettsias are a group of bacteria with complex and evolving classifications.
  • Previous taxonomic systems for rickettsias have limitations.

Purpose of the Study:

  • To propose a new, pragmatic classification of rickettsias.
  • To apply numerical taxonomy techniques for a simplified classification system.

Main Methods:

  • Utilized the simplest techniques of numerical taxonomy.
  • Analyzed data to derive a classification of rickettsias.

Main Results:

  • Proposed a new order, Rickettsiales.
  • Established three families within this order: Rickettsiaceae, Phagosomaphilaceae, and Bartonellaceae (?).
  • Classified the genus Cowdria within the tribe Chlamydieae, family Phagosomaphilaceae, alongside Chlamydia, Coxiella, and Anaplasma.

Conclusions:

  • The proposed classification provides a simplified and pragmatic framework for understanding rickettsial relationships.
  • Numerical taxonomy offers an effective approach for revising bacterial taxonomy.

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