Lists of names of prokaryotic Candidatus taxa

INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY, Год журнала: 2020, Номер 70(7), С. 3956 - 4042

Опубликована: Июль 1, 2020

We here present annotated lists of names Candidatus taxa prokaryotes with ranks between subspecies and class, proposed the mid-1990s, when provisional status was first established, end 2018. Where necessary, corrected are that comply current provisions International Code Nomenclature Prokaryotes its Orthography appendix. These lists, as well updated newly published additions corrections to be periodically in Journal Systematic Evolutionary Microbiology, may serve basis for valid publication if proposals expand type material naming also include gene sequences yet-uncultivated is accepted by Committee on Systematics Prokaryotes.

Язык: Английский

---

From Q Fever to Coxiella burnetii Infection: a Paradigm Change

Clinical Microbiology Reviews, Год журнала: 2016, Номер 30(1), С. 115 - 190

Опубликована: Ноя. 18, 2016

Coxiella burnetii is the agent of Q fever, or "query fever," a zoonosis first described in Australia 1937. Since this description, knowledge about pathogen and its associated infections has increased dramatically. We review here all progress made over last 20 years on topic. C. classically strict intracellular, Gram-negative bacterium. However, major step characterization was achieved by establishment axenic culture. infects wide range animals, from arthropods to humans. The genetic determinants virulence are now better known, thanks achievement determining genome sequences several strains species comparative genomic analyses. fever can be found worldwide, but epidemiological features disease vary according geographic area considered, including situations where it endemic hyperendemic, occurrence large epidemic outbreaks. In recent years, breakthrough understanding natural history human infection with breaking old dichotomy between "acute" "chronic" fever. clinical presentation depends both infecting strain specific risks factors infected patient. Moreover, no persistent exist without focus infection. This paradigm change should allow diagnosis management primary long-term complications patients

Язык: Английский

---

The Tick Microbiome: Why Non-pathogenic Microorganisms Matter in Tick Biology and Pathogen Transmission

Frontiers in Cellular and Infection Microbiology, Год журнала: 2017, Номер 7

Опубликована: Июнь 8, 2017

Ticks are among the most important vectors of pathogens affecting humans and other animals worldwide. They do not only carry however, as a diverse group commensal symbiotic microorganisms also present in ticks. Unlike pathogens, their biology effect on ticks remain largely unexplored, fact often neglected. Nonetheless, they can confer multiple detrimental, neutral, or beneficial effects to tick hosts, play various roles fitness, nutritional adaptation, development, reproduction, defense against environmental stress, immunity. Non-pathogenic may role driving transmission tick-borne (TBP), with many potential implications for both human animal health. In addition, genetic proximity some mutualistic symbionts hosted by is evident when studying phylogenies several bacterial genera. The best examples found within members Rickettsia, Francisella, Coxiella genera: while medical veterinary research these bacteria traditionally recognized highly virulent vertebrate it now clear evolutionary ecologists that (if most) Coxiella, Rickettsia actually non-pathogenic exhibiting alternative lifestyles symbionts. Consequently, represent compelling yet challenging system which study microbiomes microbial interactions, investigate composition, functional, ecological communities. Ultimately, deciphering relationships between well symbiont interactions will garner invaluable information, aid future development arthropod pest vector-borne pathogen control strategies.

Язык: Английский

---

Tick-Bacteria Mutualism Depends on B Vitamin Synthesis Pathways

Current Biology, Год журнала: 2018, Номер 28(12), С. 1896 - 1902.e5

Опубликована: Июнь 1, 2018

Язык: Английский

---

Evolutionary changes in symbiont community structure in ticks

Molecular Ecology, Год журнала: 2017, Номер 26(11), С. 2905 - 2921

Опубликована: Март 10, 2017

Abstract Ecological specialization to restricted diet niches is driven by obligate, and often maternally inherited, symbionts in many arthropod lineages. These heritable typically form evolutionarily stable associations with arthropods that can last for millions of years. Ticks were recently found harbour such an obligate symbiont, Coxiella ‐ LE , synthesizes B vitamins cofactors not obtained sufficient quantities from blood diet. In this study, the examination 81 tick species shows some symbioses are ancient acquisition followed codiversification as observed ticks belonging Rhipicephalus genus. However, other characterized low evolutionary stability frequent host shifts extinction events. Further revealed presence nine genera inherited bacteria ticks. Although these primarily thought be facultative, their distribution among rather suggests at least four may have independently replaced likely represent alternative symbionts. Phylogenetic evidence otherwise indicates cocladogenesis globally rare most originate via horizontal transfer existing symbiont between unrelated species. As a result, structure communities fixed across phylogeny. Most importantly, commonly reach high levels diversity up six coexisting within We further conjecture interactions pivotal drivers community both

Язык: Английский

---

A Coxiella mutualist symbiont is essential to the development of Rhipicephalus microplus

Scientific Reports, Год журнала: 2017, Номер 7(1)

Опубликована: Дек. 8, 2017

Abstract The cattle tick Rhipicephalus microplus is a hematophagous ectoparasite that causes important economic losses in livestock. Different species of ticks harbor symbiont bacterium the genus Coxiella . It was showed endosymbiont from R (CERM) vertically transmitted mutualist symbiont, comprising 98% 16S rRNA sequences both eggs and larvae. Sequencing bacterial genome revealed genes for biosynthetic pathways several vitamins key metabolic cofactors may provide nutritional complement to host. CERM abundant ovary Malpighian tubule fully engorged female. Tetracycline treatment either or vertebrate host reduced levels bacteria progeny 74% 90% larvae without major impact neither on reproductive fitness adult female embryo development. However, proved be essential reach life stage, as under antibiotic no able progress beyond metanymph stage. Data presented here suggest interference symbiotic CERM- relationship useful development alternative control methods, highlighting interdependence between their endosymbionts.

Язык: Английский

---

Grandeur Alliances: Symbiont Metabolic Integration and Obligate Arthropod Hematophagy

Trends in Parasitology, Год журнала: 2016, Номер 32(9), С. 739 - 749

Опубликована: Май 26, 2016

Язык: Английский

---

Surface sterilization methods impact measures of internal microbial diversity in ticks

Parasites & Vectors, Год журнала: 2019, Номер 12(1)

Опубликована: Май 28, 2019

Ticks are obligate blood feeders transmitting major pathogens worldwide. Over the past few years, considerable research efforts have focused on diversity, distribution and impact of gut intracellular bacterial symbionts tick development tick-borne pathogen transmission. The study this internal microbiome requires use a sterilization method to remove external (i.e. cuticular) microbes present tick's surface avoid any further contamination. Several methods exist, including ethanol- or bleach-based treatments that both effective in killing but with different potential effects DNA denaturation.

Язык: Английский

---

Genomic changes associated with the evolutionary transition of an insect gut symbiont into a blood-borne pathogen

The ISME Journal, Год журнала: 2017, Номер 11(5), С. 1232 - 1244

Опубликована: Фев. 24, 2017

The genus Bartonella comprises facultative intracellular bacteria with a unique lifestyle. After transmission by blood-sucking arthropods they colonize the erythrocytes of mammalian hosts causing acute and chronic infectious diseases. Although pathogen-host interaction is well understood, little known about evolutionary origin infection strategy manifested species. Here we analyzed six genomes apis, honey bee gut symbiont that to date represents closest relative pathogenic Comparative genomics revealed B. apis encodes large set vertically inherited genes for amino acid cofactor biosynthesis nitrogen metabolism. Most bartonellae have lost these ancestral functions, but acquired specific virulence factors expanded gene family harvesting cofactors from blood. However, deeply rooted pathogen tamiae has retained many genome characteristics reflecting an intermediate state toward host-restricted intraerythrocytic Our findings suggest ancestor was insects adaptation blood-feeding facilitated colonization bloodstream. This study highlights importance comparative among pathogens non-pathogenic relatives understand disease emergence within evolutionary-ecological framework.

Язык: Английский

---

Parasite microbiome project: Grand challenges

PLoS Pathogens, Год журнала: 2019, Номер 15(10), С. e1008028 - e1008028

Опубликована: Окт. 10, 2019

The first Parasite Microbiome Project (PMP) Workshop (January 9-14, 2019, Clearwater, Florida, United States) hosted researchers from across continents and disciplines to lay the foundation of PMP consortium.The vision is catalyze scientific discourse explorations through a systems approach, toward an integrated understanding microbiota parasites their impact on health disease.The participants identified knowledge gaps grand challenges in field host-parasite-microbe interactions summarized here.The will provide interactive centralized platform resource for transdisciplinary collaboration propel parasitology forward by disentangling complex between hosts, respective microbiota, microbial communities parasite's direct environment (Fig 1).Parasitism successful lifestyle that has evolved virtually every clade multicellular organisms [1-3] protists [4,5].Parasitology seeks develop means prevent, limit, or cure infections benefit humans, agriculture, wildlife understand how parasitism parasitic disease not only host but also ecosystem health.This challenging task, considering diversity nature host-parasite interactions.Parasitic harbor rich tapestry traits associated with survival must navigate immune response reproduce be effectively transmitted next host.

Язык: Английский

---