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https://www.readbyqxmd.com/read/28913925/a-cascade-of-destabilizations-combining-wolbachia-and-allee-effects-to-eradicate-insect-pests
#1
Julie C Blackwood, Roger Vargas, Xavier Fauvergue
1.The management of insect pests has long been dominated by the use of chemical insecticides, with the aim of instantaneously killing enough individuals to limit their damage. To minimize unwanted consequences, environmentally friendly approaches have been proposed that utilize biological control and take advantage of intrinsic demographic processes to reduce pest populations. 2.We address the feasibility of a novel pest management strategy based on the release of insects infected with Wolbachia, which causes cytoplasmic incompatibilities in its host population, into a population with a pre-existing Allee effect...
September 15, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28906572/culex-torrentium-mosquitoes-from-germany-are-negative-for-wolbachia
#2
M Leggewie, R Krumkamp, M Badusche, A Heitmann, S Jansen, J Schmidt-Chanasit, E Tannich, S C Becker
Wolbachia (Rickettsiales: Anaplasmataceae) infects a wide range of arthropods, including several mosquito species. The bacterium is known to induce a plethora of phenotypes in its host, examples being the reproductive phenotype cytoplasmic incompatibility or resistance against infection with arboviruses. The latter is especially relevant when assessing the vector competence of mosquito species for emerging arboviruses. Thus, knowledge of Wolbachia infection status is important for the assessment of vector competence...
September 14, 2017: Medical and Veterinary Entomology
https://www.readbyqxmd.com/read/28905230/molecular-detection-of-anaplasma-platys-anaplasma-phagocytophilum-and-wolbachia-sp-but-not-ehrlichia-canis-in-croatian-dogs
#3
Doroteja Huber, Irena Reil, Sanja Duvnjak, Daria Jurković, Damir Lukačević, Miroslav Pilat, Ana Beck, Željko Mihaljević, Lea Vojta, Adam Polkinghorne, Relja Beck
The bacteria Anaplasma platys, Anaplasma phagocytophilum and Ehrlichia canis are tick-borne agents that cause canine vector-borne disease. The prevalence of these pathogens in South Eastern Europe is unknown with the exception of an isolated case of A. platys detected in a dog imported into Germany from Croatia. To gain a better insight into their presence and prevalence, PCR-based screening for these bacterial pathogens was performed on domesticated dogs from different regions of Croatia. Blood samples from 1080 apparently healthy dogs from coastal and continental parts of Croatia as well as tissue samples collected from 63 deceased dogs with a history of anaemia and thrombocytopenia were collected for molecular screening by an Anaplasmataceae-specific 16S rRNA conventional PCR...
September 14, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28904344/perturbed-cholesterol-and-vesicular-trafficking-associated-with-dengue-blocking-in-wolbachia-infected-aedes-aegypti-cells
#4
Vincent Geoghegan, Kirsty Stainton, Stephanie M Rainey, Thomas H Ant, Adam A Dowle, Tony Larson, Svenja Hester, Philip D Charles, Benjamin Thomas, Steven P Sinkins
Wolbachia are intracellular maternally inherited bacteria that can spread through insect populations and block virus transmission by mosquitoes, providing an important approach to dengue control. To better understand the mechanisms of virus inhibition, we here perform proteomic quantification of the effects of Wolbachia in Aedes aegypti mosquito cells and midgut. Perturbations are observed in vesicular trafficking, lipid metabolism and in the endoplasmic reticulum that could impact viral entry and replication...
September 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/28902190/the-effects-of-outbreeding-on-a-parasitoid-wasp-fixed-for-infection-with-a-parthenogenesis-inducing-wolbachia-symbiont
#5
A R I Lindsey, R Stouthamer
Trichogramma wasps can be rendered asexual by infection with the maternally inherited symbiont Wolbachia. Previous studies indicate the Wolbachia strains infecting Trichogramma wasps are host-specific, inferred by failed horizontal transfer of Wolbachia to novel Trichogramma hosts. Additionally, Trichogramma can become dependent upon their Wolbachia infection for the production of female offspring, leaving them irreversibly asexual, further linking host and symbiont. We hypothesized Wolbachia strains infecting irreversibly asexual, resistant to horizontal transfer Trichogramma would show adaptation to a particular host genetic background...
September 13, 2017: Heredity
https://www.readbyqxmd.com/read/28892518/response-to-comment-on-rohrscheib-et-al-2016-intensity-of-mutualism-breakdown-is-determined-by-temperature-not-amplification-of-wolbachia-genes
#6
Chelsie E Rohrscheib, Francesca D Frentiu, Emilie Horn, Fiona K Ritchie, Bruno van Swinderen, Michael W Weible, Scott L O'Neill, Jeremy C Brownlie
No abstract text is available yet for this article.
September 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28892498/comment-on-rohrscheib-et-al-2016-intensity-of-mutualism-breakdown-is-determined-by-temperature-not-amplification-of-wolbachia-genes
#7
Ewa Chrostek, Luis Teixeira
No abstract text is available yet for this article.
September 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28878066/cytological-analysis-of-cytoplasmic-incompatibility-induced-by-cardinium-suggests-convergent-evolution-with-its-distant-cousin-wolbachia
#8
Marco Gebiola, Massimo Giorgini, Suzanne E Kelly, Matthew R Doremus, Patrick M Ferree, Martha S Hunter
Cytoplasmic incompatibility (CI) is a conditional sterility in numerous arthropods that is caused by inherited, intracellular bacteria such as Wolbachia Matings between males carrying CI-inducing Wolbachia and uninfected females, or between males and females infected with different Wolbachia strains, result in progeny that die during very early embryogenesis. Multiple studies in diploid (Drosophila) and haplodiploid (Nasonia) insects have shown that CI-Wolbachia cause a failure of the paternally derived chromatin from resolving into distinct chromosomes...
September 13, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28856446/ensuring-successful-introduction-of-wolbachia-in-natural-populations-of-aedes-aegypti-by-means-of-feedback-control
#9
Pierre-Alexandre Bliman, M Soledad Aronna, Flávio C Coelho, Moacyr A H B da Silva
The control of the spread of dengue fever by introduction of the intracellular parasitic bacterium Wolbachia in populations of the vector Aedes aegypti, is presently one of the most promising tools for eliminating dengue, in the absence of an efficient vaccine. The success of this operation requires locally careful planning to determine the adequate number of individuals carrying the Wolbachia parasite that need to be introduced into the natural population. The introduced mosquitoes are expected to eventually replace the Wolbachia-free population and guarantee permanent protection against the transmission of dengue to human...
August 30, 2017: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/28855327/wolbachia-bottled-water-and-the-dark-side-of-symbiosis
#10
William Sullivan
Obligate endosymbiosis is operationally defined when loss or removal of the endosymbiont from the host results in the death of both. Whereas these relationships are typically viewed as mutualistic, molecular and cellular analysis reveals numerous instances in which these symbiotic relationships are established by alternative, nonmutualistic strategies. The endosymbiont usurps or integrates into core host processes, creating a need where none previously existed. Here I discuss examples of these addictive symbiotic relationships and how they are a likely outcome of all complex evolving systems...
September 1, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28854601/large-scale-identification-of-wolbachia-pipientis-effectors
#11
Danny W Rice, Kathy B Sheehan, Irene L G Newton
Wolbachia pipientis is an intracellular symbiont of arthropods well known for the reproductive manipulations induced in the host and, more recently, for the ability of Wolbachia to block virus replication in insect vectors. Since Wolbachia cannot yet be genetically manipulated, and due to the constraints imposed when working with an intracellular symbiont, little is known about mechanisms used by Wolbachia for host interaction. Here we employed a bioinformatics pipeline and identified 163 candidate effectors, potentially secreted by Wolbachia into the host cell...
July 1, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28845255/a29%C3%A2-wolbachia-for-dengue-control-will-dengue-viruses-evolve-resistance
#12
T T Vi, D T Kien, B Wills, C P Simmons
No abstract text is available yet for this article.
March 2017: Virus Evolution
https://www.readbyqxmd.com/read/28842593/bacterial-community-structure-in-the-asian-rice-gall-midge-reveals-a-varied-microbiome-rich-in-proteobacteria
#13
Abhishek Ojha, Deepak Kumar Sinha, A P Padmakumari, J S Bentur, Suresh Nair
The Asian rice gall midge (ARGM) has emerged as a model gall forming pest of rice. The ARGM infestation of rice results in failure of panicle formation and economic loss. Understanding the molecular basis of ARGM-rice interactions is very crucial in order to control this devastating pest of rice. The current investigation was devised to identify bacterial communities present in the ARGM and in addition the bacterial diversity in the maggots during their interaction with susceptible or resistant rice varieties...
August 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28841917/effects-of-wolbachia-on-ovarian-apoptosis-in-culex-quinquefasciatus-say-1823-during-the-previtellogenic-and-vitellogenic-periods
#14
Fabio Almeida, Lincoln Suesdek
BACKGROUND: Apoptosis is programmed cell death that ordinarily occurs in ovarian follicular cells in various organisms. In the best-studied holometabolous insect, Drosophila, this kind of cell death occurs in all three cell types found in the follicles, sometimes leading to follicular atresia and egg degeneration. On the other hand, egg development, quantity and viability in the mosquito Culex quinquefasciatus are disturbed by the infection with the endosymbiont Wolbachia. Considering that Wolbachia alters reproductive traits, we hypothesised that such infection would also alter the apoptosis in the ovarian cells of this mosquito...
August 25, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28829414/maintaining-aedes-aegypti-mosquitoes-infected-with-wolbachia
#15
Perran A Ross, Jason K Axford, Kelly M Richardson, Nancy M Endersby-Harshman, Ary A Hoffmann
Aedes aegypti mosquitoes experimentally infected with Wolbachia are being utilized in programs to control the spread of arboviruses such as dengue, chikungunya and Zika. Wolbachia-infected mosquitoes can be released into the field to either reduce population sizes through incompatible matings or to transform populations with mosquitoes that are refractory to virus transmission. For these strategies to succeed, the mosquitoes released into the field from the laboratory must be competitive with native mosquitoes...
August 14, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28821226/comprehensive-proteome-profiling-in-aedes-albopictus-to-decipher-wolbachia-arbovirus-interference-phenomenon
#16
Yoann Saucereau, Claire Valiente Moro, Cindy Dieryckx, Jean-William Dupuy, Florence-Hélène Tran, Vincent Girard, Patrick Potier, Patrick Mavingui
BACKGROUND: Aedes albopictus is a vector of arboviruses that cause severe diseases in humans such as Chikungunya, Dengue and Zika fevers. The vector competence of Ae. albopictus varies depending on the mosquito population involved and the virus transmitted. Wolbachia infection status in believed to be among key elements that determine viral transmission efficiency. Little is known about the cellular functions mobilized in Ae. albopictus during co-infection by Wolbachia and a given arbovirus...
August 18, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28807085/variation-in-bacterial-endosymbionts-associated-with-the-date-palm-hopper-ommatissus-lybicus-populations
#17
S Karimi, H Izadi, M Askari Seyahooei, A N Bagheri, P Khodaygan
The date palm hopper, Ommatissus lybicus, is a key pest of the date palm, which is expected to be comprised of many allopatric populations. The current study was carried out to determine bacterial endosymbiont diversity in the different populations of this pest. Ten date palm hopper populations were collected from the main date palm growing regions in Iran and an additional four samples from Pakistan, Oman, Egypt and Tunisia for detection of primary and secondary endosymbionts using polymerase chain reaction (PCR) assay with their specific primers...
August 15, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28805637/wolbachia-mediated-virus-blocking-in-the-mosquito-vector-aedes-aegypti
#18
REVIEW
Gerard Terradas, Elizabeth A McGraw
Viruses transmitted by mosquitoes such as dengue, Zika and West Nile cause a threat to global health due to increased geographical range and frequency of outbreaks. The bacterium Wolbachia pipientis may be the solution reducing disease transmission. Though commonly missing in vector species, the bacterium was artificially and stably introduced into Aedes aegypti to assess its potential for biocontrol. When infected with Wolbachia, mosquitoes become refractory to infection by a range of pathogens, including the aforementioned viruses...
August 2017: Current Opinion in Insect Science
https://www.readbyqxmd.com/read/28805302/torix-group-rickettsia-are-widespread-in-culicoides-biting-midges-diptera-ceratopogonidae-reach-high-frequency-and-carry-unique-genomic-features
#19
Jack Pilgrim, Mats Ander, Claire Garros, Matthew Baylis, Gregory D D Hurst, Stefanos Siozios
There is increasing interest in the heritable bacteria of invertebrate vectors of disease as they present novel targets for control initiatives. Previous studies on biting midges (Culicoides spp.), known to transmit several RNA viruses of veterinary importance, have revealed infections with the endosymbiotic bacteria, Wolbachia and Cardinium. However, rickettsial symbionts in these vectors are underexplored. Here, we present the genome of a previously uncharacterized Rickettsia endosymbiont from Culicoides newsteadi (RiCNE)...
August 14, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28803406/does-wolbachia-infection-change-the-overwintering-ability-of-trichogramma-brassicae-hymenoptera-trichogrammatidae
#20
S Rahimi-Kaldeh, A Ashouri, A Bandani
The overwintering ability of a biological control agent helps predict potential survival and establishment in natural conditions. Here, we compared the overwintering ability in sexual and asexual Trichogramma brassicae Bezdenko, a key natural enemy of Lepidopteran pests in Iran over two consecutive winters in central Alborz Mountains. Our aim was to investigate the effect of Wolbachia infection on the overwintering rate of T. brassicae after emergence in the subsequent year. We also wanted to know whether there is any difference in the overwintering capacity of T...
August 12, 2017: Neotropical Entomology
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