Veterinary bacteriology: information about important bacteria
|Categories:||Zoonotic; notifiable diseases and bacteria|
|Etymology:||Genus name: cloac loving. |
Species epithet: of a parrot.
|Alternative Species Name(s):||Chlamydia psittaci|
|Type Strain:||6BC = ATCC VR-125.|
|Macromorphology (smell):||Does only grow intracellularly and can, therfore, not be cultivated on artificial substrates.|
|Micromorphology:||Outside the host cell: infectious elementary bodies (0.2-0.3 µm).
Within the host cell: non-infectious reticulate bodies (0.8-1.0 µm). C. psittaci is non-motile.
|Gram +/Gram -:||G-, difficult to gram stain.|
|Metabolism:||Aerobic, but members of the family Chlamydiaceae have only limited resources to to synthesize their own ATP. Therefore, they can ingest ATP from the host cell.|
|Special Media:||Can be cultivated in cell cultures.|
|Reservoir:||Birds. C. psittaci is common i wild birds and more than 100 different species have been reported to transmit the disease.|
|Virulence Factors:||The virulence factors of C. psittaci are unknown.|
|16S rRNA Seq.:|
||Species within the family Chlamydiaceae were previously (1999) divided into two genera Chlamydia and Chlamydophila. However, the differences between these two genera were not that great and many research groups have not accepted this division. Therefore, the genus Chlamydophila has been returned (2015) to the genus Chlamydia. See the references below.|
|Legislation:||In Sweden psittacosis is notifiable to the Swedish Board of Agriculture.|
|Comment:||It is believed that several people have been infected with psittacosis in associated with cleaning of bird feeding tables. It is, therefore, very important to always clean bird tables outside and with extreme caution to avoid aerosol formation.
Elementary bodies from C. psittaci have been reported to survive in the environment outside the host for months.
Members of the family Chlamydiaceae are obligately intracellular. The cell envelope contains cystein rich proteins and only a small amount of peptidoglycans.
|Reference(s):||No. 68, 140, 177|
|Links:||The comprehensive reference and education wiki on Chlamydia and the Chlamydiales, Klamydia-föreläsning|
|New names of bacterial phyla|
The taxonomic category phylum was previously not regulated by the International Code of Nomenclature of Prokaryotes (ICNP), but now this has changed and it was decided to revise the names of bacterial phyla. All phyla must be written in italics (which has been done on VetBact also before) and have the ending -ota.Published 2023-03-01. Read more...
|The taxonomy of chlamydias|
Species within the family Chlamydiaceae were previously divided into two genera Chlamydia and Chlamydophila. However, the differences between these two genera were not that great and many research groups have not accepted this division. Therefore, the genus Chlamydophila has been returned to the genus Chlamydia and this change has now been incorporated in VetBactPublished 2023-03-15. Read more...