Kalpana Kalpana (Editor)

Parachlamydiaceae

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Domain
  
Bacteria

Phylum
  
Chlamydiae

Order
  
Chlamydiales

Class
  
Chlamydiae

Rank
  
Family

Parachlamydiaceae httpswwwnccdcgoveidimages010210F2tnjpg

Similar
  
Chlamydiales, Waddlia, Chlamydophila abortus, Chlamydiaceae, Chlamydia muridarum

Parachlamydiaceae is a family of bacteria in the order Chlamydiales. Species in this family have a Chlamydia–like cycle of replication and their ribosomal RNA genes are 80–90% identical to ribosomal genes in the Chlamydiaceae. The Parachlamydiaceae naturally infect amoebae and can be grown in cultured Vero cells. The Parachlamydiaceae are not recognized by monoclonal antibodies that detect Chlamydiaceae lipopolysaccharide.

Parachlamydiaceae species currently include:

  • Candidatus Metachlamydia lacustris♠ Corsaro et al. 2010
  • Protochlamydia
  • Candidatus Protochlamydia amoebophila♠ Collingro et al. 2005
  • Protochlamydia naegleriophilaCasson et al. 2006
  • Parachlamydia acanthamoebae Everett et al. 1999
  • Neochlamydia hartmannellae Horn et al. 2001 (endocytobiont of Hartmannella sp. A1Hsp)
  • Isolated Endosymbionts include:

  • Hall's coccus
  • P9
  • UV-7
  • endosymbiont of Acanthamoeba sp. TUME1
  • endosymbiont of Acanthamoeba sp. UWC22
  • endosymbiont of Acanthamoeba sp. UWE1
  • Uncultured lineages include:

  • Neochlamydia turtle type 1
  • environmental Neochlamydia
  • corvenA4
  • cvC15
  • cvC7
  • cvE5
  • Parachlamydia acanthamoebae has variable Gram staining characteristics and is mesophilic. Trophozoites of Acanthamoeba hosting these strains were isolated from asymptomatic women in Germany and also in an outbreak of humidifier fever (‘Hall’s coccus’) in Vermont USA. Four patients from Nova Scotia whose sera recognized Hall’s coccus did not show serological cross-reaction with antigens from the Chlamydiaceae.

    References

    Parachlamydiaceae Wikipedia