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Table 1 Taxonomy of chlamydial organisms.

From: Chlamydiaceae infections in pig

  Chlamydial taxonomy before 1999 Chlamydial taxonomy since 1999 (Everett et al., 1999[22]) Chlamydial taxonomy used in the Twenty-first century (Stephens et al., 2009[23])
Order Chlamydiales Chlamydiales Chlamydiales
Family Chlamydiaceae Chlamydiaceae, Simkaniaceae, Parachlamydiaceae, Waddliaceae Chlamydiaceae, Simkaniaceae, Parachlamydiaceae, Waddliaceae
Genus Chlamydia   Chlamydia   Chlamydophila   Chlamydia  
Species C. trachomatis Trachoma biovar C. trachomatis Trachoma biovar    C. trachomatis Trachoma biovar
   LGV biovar   LGV biovar     LGV biovar
   Murine biovar C. muridarum     C. muridarum  
   Porcine biovar C. suis     C. suis  
  C. pneumonia Human biovar    Cp. pneumonia TWAR biovar C. pneumonia TWAR biovar
   Koala biovar     Koala biovar   Koala biovar
   Equine biovar     Equine biovar   Equine biovar
  C. psittaci Avian subtype    Cp. psittaci   C. psittaci  
   Abortion subtype    Cp. abortus   C. abortus  
   Feline subtype    Cp. felis   C. felis  
   Guinea-pig subtype    Cp. caviae   C. caviae  
  C. pecorum     Cp. pecorum   C. pecorum