<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>This article provides an overview of the current knowledge on chlamydiae, which are intracellular bacteria belonging to the <italic>Chlamydiaceae</italic> family. Whole-genome sequencing leads to great increases in the available data about <italic>Chlamydia</italic> spp. Recently, novel chlamydial taxons in various hosts living in different environments have been recognised. New species and taxons with <italic>Candidatus</italic> status have been recorded mainly in birds and reptiles. <italic>Chlamydia gallinacea</italic> is an emerging infectious agent in poultry with indirectly confirmed zoonotic potential. Recently, a new group of avian <italic>C. abortus</italic> strains with worldwide distribution in various wild bird families has been described. The definition of <italic>C. abortus</italic> species became outdated with the discovery of these strains and has been amended. It now includes two subgroups, mammalian and avian, the latter including all isolates hitherto referred to as atypical <italic>C. psittaci</italic> or <italic>C. psittaci</italic>/<italic>C. abortus</italic> intermediates.</p>
</abstract>

This article provides an overview of the current knowledge on chlamydiae, which are intracellular bacteria belonging to the Chlamydiaceae family. Whole-genome sequencing leads to great increases in the available data about Chlamydia spp. Recently, novel chlamydial taxons in various hosts living in different environments have been recognised. New species and taxons with Candidatus status have been recorded mainly in birds and reptiles. Chlamydia gallinacea is an emerging infectious agent in poultry with indirectly confirmed zoonotic potential. Recently, a new group of avian C. abortus strains with worldwide distribution in various wild bird families has been described. The definition of C. abortus species became outdated with the discovery of these strains and has been amended. It now includes two subgroups, mammalian and avian, the latter including all isolates hitherto referred to as atypical C. psittaci or C. psittaci/C. abortus intermediates.

New insight on chlamydiae

Journal of Veterinary Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"New insight on chlamydiae"}

This article provides an overview of the current knowledge on chlamydiae, which are intracellular bacteria belonging to the Chlamydiaceae family. Whole-genome...

Family	Genus	Species	Host	Zoonotic potential
Chlamydiaceae	Chlamydia	mammalian C. abortus	cattle, small ruminants, human	proven (29, 32, 52, 53)
		avian C. abortus	wild birds	lack of evidence
		C. avium	pigeon, parrot	lack of evidence
		C. buteonis	raptor	lack of evidence
		C. caviae	guinea pig	limited evidence (33)
		C. crocodili	crocodile	lack of evidence
		C. felis	cat	limited evidence (4)
		C. gallinacea	poultry	indirect confirmation (24)
		C. muridarum	mouse, hamster	lack of evidence
		C. pecorum	cattle, small ruminants, pig, koala	lack of evidence
		C. pneumoniae	snake, frog, koala, horse, human	there is no direct evidence of zoonotic transmission (7, 16)
		C. poikiloterma	snake	lack of evidence
		C. psittaci	pigeon, parrot, human	proven – psittacosis (34)
		C. serpentis	snake	lack of evidence
		C. suis	pig	proven (47)
		C. trachomatis	human	lack of evidence
		Cand. C. ibidis*	sacred ibis	lack of evidence
		Cand. C. corallus*	snake	lack of evidence
		Cand. C. sanzinia*	reptiles	lack of evidence
		Cand. C. testudinis*	tortoise	lack of evidence
	Chlamydiifrater	Chlamydiifrater phoenicopteri	flamingo	lack of evidence
	Chlamydiifrater	Chlamydiifrater volucris	flamingo	lack of evidence

New insight on chlamydiae

Article Category: REVIEW ARTICLE

Publicado en línea: 19 dic 2023

Páginas: 559 - 565

Recibido: 25 jul 2023

Aceptado: 24 nov 2023

DOI: https://doi.org/10.2478/jvetres-2023-0067

Palabras clave
chlamydiae, novel taxons, chlamydiosis, zoonosis

© 2023 Monika Szymańska-Czerwińska et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The members of the family Chlamydiaceae and their main hosts

New insight on chlamydiae

Article Category: REVIEW ARTICLE

Publicado en línea: 19 dic 2023

Páginas: 559 - 565

Recibido: 25 jul 2023

Aceptado: 24 nov 2023

DOI: https://doi.org/10.2478/jvetres-2023-0067

Palabras clavechlamydiae, novel taxons, chlamydiosis, zoonosis

© 2023 Monika Szymańska-Czerwińska et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The members of the family Chlamydiaceae and their main hosts

Palabras clave
chlamydiae, novel taxons, chlamydiosis, zoonosis