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https://www.readbyqxmd.com/read/29789369/-wolbachia-w-stri-blocks-zika-virus-growth-at-two-independent-stages-of-viral-replication
#1
M J Schultz, A L Tan, C N Gray, S Isern, S F Michael, H M Frydman, J H Connor
Mosquito-transmitted viruses are spread globally and present a great risk to human health. Among the many approaches investigated to limit the diseases caused by these viruses are attempts to make mosquitos resistant to virus infection. Coinfection of mosquitos with the bacterium Wolbachia pipientis from supergroup A is a recent strategy employed to reduce the capacity for major vectors in the Aedes mosquito genus to transmit viruses, including dengue virus (DENV), Chikungunya virus (CHIKV), and Zika virus (ZIKV)...
May 22, 2018: MBio
https://www.readbyqxmd.com/read/29779872/the-maternal-effect-gene-wds-controls-wolbachia-titer-in-nasonia
#2
Lisa J Funkhouser-Jones, Edward J van Opstal, Ananya Sharma, Seth R Bordenstein
Maternal transmission of intracellular microbes is pivotal in establishing long-term, intimate symbioses. For germline microbes that exert negative reproductive effects on their hosts, selection can theoretically favor the spread of host genes that counteract the microbe's harmful effects. Here, we leverage a major difference in bacterial (Wolbachia pipientis) titers between closely related wasp species with forward genetic, transcriptomic, and cytological approaches to map two quantitative trait loci that suppress bacterial titers via a maternal effect...
May 4, 2018: Current Biology: CB
https://www.readbyqxmd.com/read/29777177/controlling-vector-borne-diseases-by-releasing-modified-mosquitoes
#3
REVIEW
Heather A Flores, Scott L O'Neill
Aedes mosquito-transmitted diseases, such as dengue, Zika and chikungunya, are becoming major global health emergencies while old threats, such as yellow fever, are re-emerging. Traditional control methods, which have focused on reducing mosquito populations through the application of insecticides or preventing breeding through removal of larval habitat, are largely ineffective, as evidenced by the increasing global disease burden. Here, we review novel mosquito population reduction and population modification approaches with a focus on control methods based on the release of mosquitoes, including the release of Wolbachia-infected mosquitoes and strategies to genetically modify the vector, that are currently under development and have the potential to contribute to a reversal of the current alarming disease trends...
May 18, 2018: Nature Reviews. Microbiology
https://www.readbyqxmd.com/read/29771340/reproductive-manipulators-in-the-bark-beetle-pityogenes-chalcographus-coleoptera-curculionidae-the-role-of-cardinium-rickettsia-spiroplasma-and-wolbachia
#4
Martin Schebeck, Lukas Feldkirchner, Belen Marín, Susanne Krumböck, Hannes Schuler, Christian Stauffer
Heritable bacterial endosymbionts can alter the biology of numerous arthropods. They can influence the reproductive outcome of infected hosts, thus affecting the ecology and evolution of various arthropod species. The spruce bark beetle Pityogenes chalcographus (L.) (Coleoptera: Curculionidae: Scolytinae) was reported to express partial, unidirectional crossing incompatibilities among certain European populations. Knowledge on the background of these findings is lacking; however, bacterial endosymbionts have been assumed to manipulate the reproduction of this beetle...
May 1, 2018: Journal of Insect Science
https://www.readbyqxmd.com/read/29766491/rapid-spread-of-a-wolbachia-infection-that-does-not-affect-host-reproduction-in-drosophila-simulans-cage-populations
#5
Peter Kriesner, Ary A Hoffmann
Wolbachia endosymbionts that are maternally inherited can spread rapidly in host populations through inducing sterility in uninfected females, but some Wolbachia infections do not influence host reproduction yet still persist. These infections are particularly interesting because they likely represent mutualistic endosymbionts, spreading by increasing host fitness. Here we document such a spread in the wAu infection of Drosophila simulans. By establishing multiple replicate cage populations, we show that wAu consistently increased from an intermediate frequency to near fixation, representing an estimated fitness advantage of around 20% for infected females...
May 15, 2018: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/29765368/killing-effects-of-an-isolated-serratia-marcescens-kh-001-on-diaphorina-citri-via-lowering-the-endosymbiont-numbers
#6
Wei Hu, Fan Kuang, Zhanjun Lu, Ning Zhang, Tingtao Chen
Huanglongbing (HLB) is the most devastating citrus disease worldwide, and suppression of the Asian citrus psyllid ( Diaphorina citri ) is regarded as an effective method to inhibit the spread of HLB. In this study, we isolated a strain named as Serratia marcescens KH-001 from D. citri nymphs suffering from disease, and evaluated its killing effect on D. citri via toxicity test and effect on microbial community in D. citri using high-throughput sequencing. Our results indicated that S. marcescens KH-001 could effectively kill 83% of D...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29761037/uncovering-the-hidden-players-in-lepidoptera-biology-the-heritable-microbial-endosymbionts
#7
Anne Duplouy, Emily A Hornett
The Lepidoptera is one of the most widespread and recognisable insect orders. Due to their remarkable diversity, economic and ecological importance, moths and butterflies have been studied extensively over the last 200 years. More recently, the relationship between Lepidoptera and their heritable microbial endosymbionts has received increasing attention. Heritable endosymbionts reside within the host's body and are often, but not exclusively, inherited through the female line. Advancements in molecular genetics have revealed that host-associated microbes are both extremely prevalent among arthropods and highly diverse...
2018: PeerJ
https://www.readbyqxmd.com/read/29757522/evidence-of-natural-wolbachia-infections-and-molecular-identification-of-field-populations-of-culex-pipiens-complex-diptera-culicidae-mosquitoes-in-western-turkey
#8
Burçin Morçiçek, Belgin Gocmen Taskin, Ersin Doğaç, Taylan Doğaroğlu, Vatan Taskin
Establishing reliable risk projection information about the distribution pattern of members of the Culex pipiens complex is of particular interest, as these mosquitoes are competent vectors for certain disease-causing pathogens. Wolbachia, a maternally inherited bacterial symbiont, are distributed in various arthropod species and can induce cytoplasmic incompatibility, i.e., reduced egg hatch, in certain crosses. It is being considered as a tool for population control of mosquito disease vectors. The Aegean region is characterized by highly populated, rural, and agricultural areas and is also on the route of the migratory birds...
June 2018: Journal of Vector Ecology: Journal of the Society for Vector Ecology
https://www.readbyqxmd.com/read/29751814/a-wolbachia-triple-strain-infection-generates-self-incompatibility-in-aedes-albopictus-and-transmission-instability-in-aedes-aegypti
#9
Thomas H Ant, Steven P Sinkins
BACKGROUND: Artificially-introduced transinfections of the intracellular bacterium Wolbachia pipientis have the potential to reduce the vectorial capacity of mosquito populations for viruses such as dengue and chikungunya. Aedes albopictus has two native strains of Wolbachia, but their replacement with the non-native wMel strain blocks transmission of both viruses. The pattern of cytoplasmic incompatiiblity generated by wMel with wild-types is bidirectional. Novel-plus-native-strain co-infection is predicted to lead to a more efficient population spread capacity; from a bi-directional to a uni-directional cytoplasmic incompatibility (CI) model...
May 11, 2018: Parasites & Vectors
https://www.readbyqxmd.com/read/29745300/wsp-based-analysis-of-wolbachia-strains-associated-with-phlebotomus-papatasi-and-p-sergenti-diptera-psychodidae-main-cutaneous-leishmaniasis-vectors-introduction-of-a-new-subgroup-wserg
#10
Fateh Karimian, Hassan Vatandoost, Yavar Rassi, Naseh Maleki-Ravasan, Nayyereh Choubdar, Mona Koosha, Kourosh Arzamani, Eslam Moradi-Asl, Arshad Veysi, Hamzeh Alipour, Manouchehr Shirani, Mohammad Ali Oshaghi
Sand flies of Phlebotomus papatasi and P. sergenti are the main vectors of cutaneous leishmanisis (CL) in the old world. We aimed to screen Iranian P. papatasi and P. sergenti for their natural infections with Wolbachia and to determine their phylogenetic association with other species. Wolbachia surface protein (wsp) gene was PCR amplified from DNA extracted from Phlebotomus species, sequenced, and were analysed in combination with wsp sequences related to Phelebtominae and other insects. All Wolbachia-infecting Iranian sand flies of P...
May 10, 2018: Pathogens and Global Health
https://www.readbyqxmd.com/read/29732657/ocnus-is-essential-for-male-germ-cell-development-in-drosophila-melanogaster
#11
Y Zheng, J Bi, M-Y Hou, W Shen, W Zhang, H Ai, X-Q Yu, Y-F Wang
The ocnus (ocn) gene encodes a protein abundant in the testes, implying its role in testis development. When Drosophila melanogaster is infected with the endosymbiont wMel Wolbachia, which affects the spermatogenesis of its hosts, ocn is downregulated in the third-instar larval testes, suggesting a role of ocn in spermatogenesis. In this study, we knocked down ocn in the testes and found that the hatch rates of embryos derived from ocn-knockdown males were significantly decreased, and 84.38% of the testes were much smaller in comparison to controls...
May 6, 2018: Insect Molecular Biology
https://www.readbyqxmd.com/read/29725059/feminizing-wolbachia-influence-microbiota-composition-in-the-terrestrial-isopod-armadillidium-vulgare
#12
Jessica Dittmer, Didier Bouchon
Wolbachia are widespread heritable endosymbionts of arthropods notorious for their profound effects on host fitness as well as for providing protection against viruses and eukaryotic parasites, indicating that they can interact with other microorganisms sharing the same host environment. Using the terrestrial isopod crustacean Armadillidium vulgare, its highly diverse microbiota (>200 bacterial genera) and its three feminizing Wolbachia strains (wVulC, wVulM, wVulP) as a model system, the present study demonstrates that Wolbachia can even influence the composition of a diverse bacterial community under both laboratory and natural conditions...
May 3, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29722798/stochastic-processes-govern-bacterial-communities-from-the-blood-of-pikas-and-from-their-arthropod-vectors
#13
Huan Li, Tongtong Li, Jiapeng Qu
Vector-borne microbes influence pathogen transmission and blood microbiomes, thereby affecting the emergence of infectious diseases. Thus, understanding the relationship between host and vector microbiomes is of importance. In this study, we investigated the bacterial community composition, diversity and assembly of the flea (Rhadinopsylla dahurica vicina), torsalo (Hypoderma curzonial), and the blood and gut of their shared pika host, Ochotona curzoniae. Bartonella, Sphingomonas and Bradyrhizobium were enriched in blood, while Wolbachia and Fusobacterium were more abundant in fleas and torsaloes...
May 2, 2018: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/29720714/wolbachia-significantly-impacts-the-vector-competence-of-aedes-aegypti-for-mayaro-virus
#14
Thiago Nunes Pereira, Marcele Neves Rocha, Pedro Henrique Ferreira Sucupira, Fabiano Duarte Carvalho, Luciano Andrade Moreira
Wolbachia, an intracellular endosymbiont present in up to 70% of all insect species, has been suggested as a sustainable strategy for the control of arboviruses such as Dengue, Zika and Chikungunya. As Mayaro virus outbreaks have also been reported in Latin American countries, the objective of this study was to evaluate the vector competence of Brazilian field-collected Ae. aegypti and the impact of Wolbachia (wMel strain) upon this virus. Our in vitro studies with Aag2 cells showed that Mayaro virus can rapidly multiply, whereas in wMel-infected Aag2 cells, viral growth was significantly impaired...
May 2, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29720706/can-wolbachia-save-the-day
#15
Alena Pance
No abstract text is available yet for this article.
May 2, 2018: Nature Reviews. Microbiology
https://www.readbyqxmd.com/read/29709692/turning-one-into-five-integrative-taxonomy-uncovers-complex-evolution-of-cryptic-species-in-the-harvester-ant-messor-structor
#16
Florian M Steiner, Sándor Csősz, Bálint Markó, Alexander Gamisch, Lukas Rinnhofer, Clemens Folterbauer, Sarina Hammerle, Christian Stauffer, Wolfgang Arthofer, Birgit C Schlick-Steiner
Seed harvesting ants are ecosystem engineers that shape vegetation, nutrient cycles, and microclimate. Progress in ecological research is, however, slowed down by poor species delimitation. For example, it has not been resolved to date, how many species the European harvester ant Messor "structor" (Latreille, 1798) represents. Since its first description, splitting into additional taxa was often proposed but not accepted later on due to inconsistent support from morphology and ecology. Here, we took an iterative integrative-taxonomy approach - comparing multiple, independent data sets of the same sample - and used traditional morphometrics, Wolbachia symbionts, mitochondrial DNA, amplified fragment length polymorphism, and ecological niche modelling...
April 27, 2018: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/29701280/enhancing-nanos-expression-via-the-bacterial-tomo-protein-is-a-conserved-strategy-used-by-the-symbiont-wolbachia-to-fuel-germ-stem-cell-maintenance-in-infected-drosophila-females
#17
Manabu Ote, Daisuke Yamamoto
The toxic manipulator of oogenesis (TomO) protein has been identified in the wMel strain of Wolbachia that symbioses with the vinegar fly Drosophila melanogaster, as a protein that affects host reproduction. TomO protects germ stem cells (GSCs) from degeneration, which otherwise occurs in ovaries of host females that are mutant for the gene Sex-lethal (Sxl). We isolated the TomO homologs from wPip, a Wolbachia strain from the mosquito Culex quinquefasciatus. One of the homologs, TomOw Pip 1, exerted the GSC rescue activity in fly Sxl mutants when lacking its hydrophobic stretches...
April 27, 2018: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/29694414/first-detection-of-wolbachia-in-the-new-zealand-biota
#18
Benjamin Bridgeman, Mary Morgan-Richards, David Wheeler, Steven A Trewick
Wolbachia is one of the most widespread intracellular bacteria on earth, estimated to infect between 40 and 66% of arthropod species in most ecosystems that have been surveyed. Their significance rests not only in their vast distribution, but also in their ability to modify the reproductive biology of their hosts, which can ultimately affect genetic diversity and speciation of infected populations. Wolbachia has yet to be formally identified in the fauna of New Zealand which has high levels of endemic biodiversity and this represents a gap in our understanding of the global biology of Wolbachia...
2018: PloS One
https://www.readbyqxmd.com/read/29691935/mitochondria-and-wolbachia-titers-are-positively-correlated-during-maternal-transmission
#19
Lucas P Henry, Irene L G Newton
Mothers provide their offspring with symbionts. Maternally transmitted, intracellular symbionts must disperse from mother to offspring with other cytoplasmic elements, like mitochondria. Here, we investigated how the intracellular symbiont Wolbachia interacts with mitochondria during maternal transmission. Mitochondria and Wolbachia may interact antagonistically and compete as each population tries to ensure its own evolutionary success. Alternatively, mitochondria and Wolbachia may cooperate as both benefit from ensuring the fitness of the mother...
April 25, 2018: Molecular Ecology
https://www.readbyqxmd.com/read/29689195/wolbachia-control-stem-cell-behavior-and-stimulate-germline-proliferation-in-filarial-nematodes
#20
Vincent Foray, Mercedes M Pérez-Jiménez, Nour Fattouh, Frédéric Landmann
Although symbiotic interactions are ubiquitous in the living world, examples of developmental symbioses are still scarce. We show here the crucial role of Wolbachia in the oogenesis of filarial nematodes, a class of parasites of biomedical and veterinary relevance. We applied newly developed techniques to demonstrate the earliest requirements of Wolbachia in the parasite germline preceding the production of faulty embryos in Wolbachia-depleted nematodes. We show that Wolbachia stimulate germline proliferation in a cell-autonomous manner, and not through nucleotide supplementation as previously hypothesized...
April 23, 2018: Developmental Cell
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