Results 21 to 30 of about 3,759 (166)

The evolutionary origin of host association in the Rickettsiales

Nature Microbiology, 2022
AbstractThe evolution of obligate host-association of bacterial symbionts and pathogens remains poorly understood. The Rickettsiales are an alphaproteobacterial order of obligate endosymbionts and parasites that infect a wide variety of eukaryotic hosts, including humans, livestock, insects and protists.
Max E. Schön, Joran Martijn, Julian Vosseberg, Stephan Köstlbacher, Thijs J. G. Ettema   +4 more
openaire   +5 more sources

What are the Evolutionary Origins of Mitochondria? A Complex Network Approach. [PDF]

PLoS ONE, 2015
Mitochondria originated endosymbiotically from an Alphaproteobacteria-like ancestor. However, it is still uncertain which extant group of Alphaproteobacteria is phylogenetically closer to the mitochondrial ancestor. The proposed groups comprise the order
Daniel S Carvalho, Roberto F S Andrade, Suani T R Pinho, Aristóteles Góes-Neto, Thierry C P Lobão, Gilberto C Bomfim, Charbel N El-Hani   +6 more
doaj   +1 more source

Characterization of a Pseudokeronopsis Strain (Ciliophora, Urostylida) and Its Bacterial Endosymbiont “Candidatus Trichorickettsia” (Alphaproteobacteria, Rickettsiales)

Diversity, 2022
Symbiotic associations between bacteria and ciliate protists are rather common. In particular, several cases were reported involving bacteria of the alphaproteobacterial lineage Rickettsiales, but the diversity, features, and interactions in these ...
Michele Castelli, Valentina Serra, Leandro Gammuto, Marcus V. X. Senra, Letizia Modeo, Giulio Petroni   +5 more
doaj   +1 more source

Phylogenetic affiliation of mitochondria with Alpha-II and Rickettsiales is an artefact [PDF]

Nature Ecology & Evolution, 2022
Fan et al. challenge the finding that mitochondria represent a sister group to Alphaproteobacteria1, arguing that support for thisposition can be explained by unreliable site removal methods andoutgroup attraction. The authors chose to reduce compositionalheterogeneity by replacing AT-rich Rickettsiales and mitochondriawith GC-rich alternatives and ...
Joran Martijn, Julian Vosseberg, Lionel Guy, Pierre Offre, Thijs J. G. Ettema   +4 more
openaire   +4 more sources

Human-pathogenic Anaplasma spp., and Rickettsia spp. in animals in Xi'an, China. [PDF]

PLoS Neglected Tropical Diseases, 2018
In China, thirteen species of tick-borne rickettsiales bacteria pathogenic to human have been reported in ticks and host animals, and human patients caused by them also has been identified. However, investigation for rickettsiales bacteria circulating in
Wen-Ping Guo, Baicheng Huang, Qin Zhao, Gang Xu, Baoyuan Liu, Yi-Han Wang, En-Min Zhou   +6 more
doaj   +1 more source

Extensive diversity of Rickettsiales bacteria in two species of ticks from China and the evolution of the Rickettsiales [PDF]

BMC Evolutionary Biology, 2014
Les bactéries de l'ordre des Rickettsiales (Alphaproteobacteria) sont des parasites intracellulaires obligatoires qui infectent les espèces de pratiquement toutes les grandes lignées eucaryotes. Plusieurs genres rickettsiaux abritent des espèces qui sont d'importants agents pathogènes émergents et ré-émergents de l'homme.
Yan Jun Kang, Xiu Nian Diao, Gao Yu Zhao, Ming Hui Chen, Yanwen Xiong, Mǎng Shī, Wei Fu, Yu Guo, Pan Bao, Xiao Ping Chen, Edward C. Holmes, Joseph J. Gillespie, Stephen J. Dumler, Yǒng Zhèn Zhāng   +13 more
openaire   +2 more sources

Infection of the endothelium by members of the order Rickettsiales [PDF]

Thrombosis and Haemostasis, 2009
SummaryThe vascular endothelium is the main target of a limited number of infectious agents; Rickettsia, Ehrlichia ruminantium, and Orientia tsutsugamushi are among them. These arthropod-transmitted obligately-intracellular bacteria cause serious systemic diseases that are not infrequently lethal.
Gustavo, Valbuena, David H, Walker
openaire   +2 more sources

Flea-Borne Typhus Causing Hemophagocytic Lymphohistiocytosis: An Autopsy Case

Infectious Disease Reports, 2023
Infection with members of the order Rickettsiales (the genera Rickettsia, Anaplasma, Orientia, and Ehrlichia) is known to cause hemophagocytic lymphohistiocytosis (HLH). The literature is scant on flea-borne typhus (FBT) being implicated in this process.
Divya Chandramohan, Moyosore Awobajo, Olivia Fisher, Christopher L. Dayton, Gregory M. Anstead   +4 more
doaj   +1 more source

The SAR11 group of alpha-proteobacteria is not related to the origin of mitochondria.

PLoS ONE, 2012
Although free living, members of the successful SAR11 group of marine alpha-proteobacteria contain a very small and A+T rich genome, two features that are typical of mitochondria and related obligate intracellular parasites such as the Rickettsiales ...
Naiara Rodríguez-Ezpeleta, T Martin Embley   +1 more
doaj   +1 more source

Comparative genomics of emerging human ehrlichiosis agents. [PDF]

PLoS Genetics, 2006
Anaplasma (formerly Ehrlichia) phagocytophilum, Ehrlichia chaffeensis, and Neorickettsia (formerly Ehrlichia) sennetsu are intracellular vector-borne pathogens that cause human ehrlichiosis, an emerging infectious disease.
Julie C Dunning Hotopp, Mingqun Lin, Ramana Madupu, Jonathan Crabtree, Samuel V Angiuoli, Jonathan A Eisen, Rekha Seshadri, Qinghu Ren, Martin Wu, Teresa R Utterback, Shannon Smith, Matthew Lewis, Hoda Khouri, Chunbin Zhang, Hua Niu, Quan Lin, Norio Ohashi, Ning Zhi, William Nelson, Lauren M Brinkac, Robert J Dodson, M J Rosovitz, Jaideep Sundaram, Sean C Daugherty, Tanja Davidsen, Anthony S Durkin, Michelle Gwinn, Daniel H Haft, Jeremy D Selengut, Steven A Sullivan, Nikhat Zafar, Liwei Zhou, Faiza Benahmed, Heather Forberger, Rebecca Halpin, Stephanie Mulligan, Jeffrey Robinson, Owen White, Yasuko Rikihisa, Hervé Tettelin   +39 more
doaj   +2 more sources