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TWAR: a new chlamydial species?

R Nicosia1, R Pustorino, R Sessa

  • 1IV Cattedra di Microbiologia, Facoltà di Medicina e Chirurgia, Università La Sapienza, Roma.

Bollettino Dell'Istituto Sieroterapico Milanese
|June 1, 1990
PubMed
Summary

A new Chlamydia strain, Taiwan Acute Respiratory (TWAR), initially classified as C. psittaci, is now proposed as a new species, Chlamydia pneumoniae. This bacterium causes respiratory illness and may be linked to ischemic heart disease.

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Area of Science:

  • Microbiology
  • Infectious Diseases
  • Cardiology

Background:

  • The Taiwan Acute Respiratory (TWAR) agent, identified in 1986, presented classification challenges within the Chlamydia genus.
  • Initial classification as Chlamydia psittaci was based on morphological characteristics like oval, glycogen-free inclusions.

Purpose of the Study:

  • To clarify the taxonomic status of the TWAR agent.
  • To investigate the etiological role of TWAR in respiratory infections and potentially ischemic heart disease.

Main Methods:

  • Immunological analysis
  • DNA analysis
  • Ultrastructural morphology studies

Main Results:

  • Evidence suggests TWAR represents a distinct Chlamydial species, proposed as Chlamydia pneumoniae.

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  • TWAR is a significant cause of respiratory syndromes, ranging from mild illness to pneumonia, with epidemic potential.
  • Emerging research indicates a potential role in the pathogenesis of ischemic cardiopathy.

    • Conclusions:

    • The TWAR agent should be recognized as a new Chlamydial species, Chlamydia pneumoniae.
    • Chlamydia pneumoniae is a key pathogen in respiratory infections and a potential contributor to cardiovascular disease.