Recent discoveries of basal extracellular Rickettsiales have illuminated divergent
evolutionary paths to host dependency in later-evolving lineages. Family Rickettsiaceae …

ABSTRACT The family “Candidatus Midichloriaceae” constitutes the most diverse but least
studied lineage within the important order of intracellular bacteria Rickettsiales.“Candidatus …

Members of the bacterial genus Rickettsia were originally identified as causative agents of
vector-borne diseases in mammals. However, many Rickettsia species are arthropod …

Gene transfer agents (GTAs) are virus-like structures that package and transfer prokaryotic
DNA from donor to recipient prokaryotic cells. Here, we describe widespread GTA gene …

The associations and the co-evolution of bacteria and eukaryotic microalgae are raising
great interest in the last years, especially in the “phycosphere”, that is the area around the …

Holosporales are an alphaproteobacterial lineage encompassing bacteria obligatorily
associated with multiple diverse eukaryotes. For most representatives, little is known on the …

During 2021, 403 ticks including Haemaphysalis qinghaiensis, Ixodes ovatus, Ixodes
acutitarsus, and Rhipicephalus microplus were collected from three sites (590, 310, and 576 …

Abstract The order Rickettsiales (Alphaproteobacteria) encompasses multiple diverse
lineages of host-associated bacteria, including pathogens, reproductive manipulators, and …

The diversity of prokaryotic symbionts in Ciliophora and other protists is fascinatingly rich;
they may even include some potentially pathogenic bacteria. In this review, we summarize …

Symbiotic microbes from the genus' Candidatus Megaira'(Rickettsiales) are known to be
common associates of algae and ciliates. However, genomic resources for these bacteria …