Neochlamydia hartmannellae gen. nov., sp. nov. (Parachlamydiaceae), an endoparasite of the amoeba Hartmannella vermiformis.

@article{Horn2000NeochlamydiaHG,
  title={Neochlamydia hartmannellae gen. nov., sp. nov. (Parachlamydiaceae), an endoparasite of the amoeba Hartmannella vermiformis.},
  author={Matthias Horn and Michael Wagner and K D M{\"u}ller and E N Schmid and T R Fritsche and K H Schleifer and R Michel},
  journal={Microbiology},
  year={2000},
  volume={146 ( Pt 5)},
  pages={
          1231-9
        }
}
Free-living amoebae are increasingly being recognized to serve as vehicles of dispersal for various bacterial human pathogens and as hosts for a variety of obligate bacterial endocytobionts. Several Chlamydia-like Acanthamoeba endocytobionts constituting the recently proposed family Parachlamydiaceae are of special interest as potential human pathogens. In this study coccoid bacterial endocytobionts of a Hartmannella vermiformis isolate were analysed. Infection of H. vermiformis with these… 

Figures and Tables from this paper

“Candidatus Mesochlamydia elodeae” (Chlamydiae: Parachlamydiaceae), a novel chlamydia parasite of free-living amoebae
Vannella sp. isolated from waterweed Elodea sp. was found infected by a chlamydia-like organism. This organism behaves like a parasite, causing the death through burst of its host. Once the vannellae
Members of the Cytophaga-Flavobacterium-Bacteroides phylum as intracellular bacteria of acanthamoebae: proposal of 'Candidatus Amoebophilus asiaticus'.
Three Gram-negative, rod-shaped bacteria that were found intracellularly in two environmental and one clinical Acanthamoeba sp. isolates were analysed. Two endocytobionts showing a parasitic
Obligate bacterial endosymbionts of Acanthamoeba spp. related to the beta-Proteobacteria: proposal of 'Candidatus Procabacter acanthamoebae' gen. nov., sp. nov.
TLDR
It is demonstrated that six rod-shaped gram-negative obligate bacterial endosymbionts of clinical and environmental isolates of Acanthamoeba spp.
Free-living Amoebae Serve as a Host for the Chlamydia-like Bacterium Simkania negevensis
TLDR
The observation that Simkania negevensis can survive and replicate within at least four of tested FLA species suggests that various free-living amoebae may serve as survival and multiplication vehiclessupporting the spread of these pathogens in aquatic environments.
Free-living Amoebae May Serve as Hosts for the Chlamydia-like Bacterium Waddlia chondrophila Isolated from an Aborted Bovine Foetus
TLDR
The potential of 21 different species of free-living amoebas to serve as hosts of a newly found bacterium, Waddlia chondrophila, found in Rheinstetten, Germany was examined, finding that Hartmannella-adapted Waddia exhibited a broader host range when compared to the BGM cell isolate.
'Candidatus Protochlamydia amoebophila', an endosymbiont of Acanthamoeba spp.
TLDR
Analysis of its complete genome sequence demonstrated that UWE25 shows many characteristic features of chlamydiae, including dependency on host-derived metabolites, composition of the cell envelope and the ability to thrive as an energy parasite within the cells of its eukaryotic host.
Novel Chlamydiae and Amoebophilus endosymbionts are prevalent in wild isolates of the model social amoeba Dictyostelium discoideum
TLDR
The presence and prevalence of novel strains of obligate intracellular symbionts from within the Chlamydiae, Amoebophilus, and Procabacter lineages in natural populations of the social amoeba Dictyostelium discoideum are identified and it is demonstrated that these Symbionts do not affect amoEBa fitness under standard laboratory conditions.
An Acanthamoeba sp. containing two phylogenetically different bacterial endosymbionts
Acanthamoebae are ubiquitous free-living amoebae and important predators of microbial communities. They frequently contain obligate intracellular bacterial symbionts, which show a worldwide
Characterization of a Neochlamydia-like bacterium associated with epitheliocystis in cultured Arctic charr Salvelinus alpinus.
TLDR
Presence of a clinical neochlamydial sequence, first identified from a cat, in Arctic charr suggests a possible mammalian and piscine host range for some environmental chlamydiae.
...
...

References

SHOWING 1-10 OF 41 REFERENCES
Novel bacterial endosymbionts of Acanthamoeba spp. related to the Paramecium caudatum symbiont Caedibacter caryophilus.
TLDR
The phylogeny of three Gram-negative, rod-shaped endosymbionts and their Acanthamoeba host cells was analysed by the rRNA approach and two new sequence types (T13 and T14) within the genus Acanthimoeba are proposed.
In Situ Detection of Novel Bacterial Endosymbionts of Acanthamoeba spp. Phylogenetically Related to Members of the Order Rickettsiales
TLDR
The finding of a related lineage of endosymbionts in protozoan hosts was unexpected and may have implications for the preadaptation and/or recruitment of rickettsia-like bacteria to metazoan hosts.
Mycobacterium avium Bacilli Grow Saprozoically in Coculture with Acanthamoeba polyphaga and Survive within Cyst Walls
TLDR
The growth ofMycobacterium avium, a human pathogen associated with domestic water supplies, in coculture with the free-living amoeba and Canthamoeba polyphaga is compared with the growth of M. avium when it was separated fromAmoebae by a 0.1-μm-pore-size polycarbonate membrane.
Obligate intracellular bacterial parasites of acanthamoebae related to Chlamydia spp
TLDR
The phylogeny of obligate intracellular coccoid parasites of acanthamoebae isolated from the nasal mucosa of humans was analyzed by the rRNA approach and the results suggest that small amoebae could be environmental reservoirs and vectors for a variety of potentially pathogenic bacteria including members of the Chlamydiaceae.
Enhancement of in vitro cytopathogenicity by Acanthamoeba spp. following acquisition of bacterial endosymbionts.
TLDR
Evidence is provided that obligate bacterial endosymbionts are able to enhance amoebic pathogenic potential in vitro by some as-yet unknown mechanism.
Transmissibility of Bacterial Endosymbionts Between Isolates of Acanthamoeba Spp.
ABSTRACT. Experimental transmission of two bacterial endosymbionts to symbiont‐free isolates of Acanthamoeba spp. was studied to determine specificity of the host‐symbiont relationship. Both
Occurrence of bacterial endosymbionts in Acanthamoeba spp. isolated from corneal and environmental specimens and contact lenses
TLDR
It is suggested that endosymbiosis occurs commonly among members of the family Acanthamoebidae and that the endosYmbionts comprise a diverse taxonomic assemblage.
Phylogenetic diversity of intra-amoebal legionellae as revealed by 16S rRNA gene sequence comparison.
TLDR
LLAPs do not represent a unique species or even a single line of descent within the genus Legionella, and investigation of more isolates may reveal them to be as evolutionarily diverse as the other presently recognized Legionella species.
Occurrence of fragmented 16S rRNA in an obligate bacterial endosymbiont of Paramecium caudatum.
The phylogenetic position of Caedibacter caryophila, a so far noncultured killer symbiont of Paramecium caudatum, was elucidated by comparative sequence analysis of in vitro amplified 16S rRNA genes
...
...