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https://www.readbyqxmd.com/read/28551564/effects-of-local-scale-decontamination-in-a-secondary-forest-contaminated-after-the-fukushima-nuclear-power-plant-accident
#1
Yoshiko Ayabe, Naoki Hijii, Chisato Takenaka
We investigated whether local-scale decontamination (removal of the litter layer, superficial soil layer, and understory) in a secondary forest contaminated by the Fukushima nuclear power plant accident reduced (137)Cs contamination of the soil and litter. We also measured (137)Cs concentrations in plants and in the web-building spider Nephila clavata (Nephilidae: Arachnida), as an indicator species, to examine (137)Cs contamination in arthropods. One month after decontamination, the total (137)Cs contamination (soil + litter) was reduced by 20% (100 kBq·m(-2)) relative to that in an adjacent untreated (i...
May 25, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28549573/the-dose-makes-the-poison-nutritional-overload-determines-the-life-traits-of-blood-feeding-arthropods
#2
REVIEW
Marcos Sterkel, José Henrique M Oliveira, Vanessa Bottino-Rojas, Gabriela O Paiva-Silva, Pedro L Oliveira
Vertebrate blood composition is heavily biased towards proteins, and hemoglobin, which is a hemeprotein, is by far the most abundant protein. Typically, hematophagous insects ingest blood volumes several times their weight before the blood meal. This barbarian feast offers an abundance of nutrients, but the degradation of blood proteins generates toxic concentrations of amino acids and heme, along with unparalleled microbiota growth. Despite this challenge, hematophagous arthropods have successfully developed mechanisms that bypass the toxicity of these molecules...
May 23, 2017: Trends in Parasitology
https://www.readbyqxmd.com/read/28547377/the-excessive-enrichment-of-trace-elements-in-migratory-and-breeding-red-crowned-cranes-grus-japonensis-in-china
#3
Luo Jinming, Wang Yongjie, Gao Zhongyan, Wang Wenfeng
The excessive enrichment of trace elements, such as Pb and Cd, from food may contribute to the decline of migratory red-crowned cranes (Grus japonensis) in China. To test this prediction, we determined the concentrations of Pb and Cd, as well as further macro and trace elements (Ca, Mg, Cu, Zn) in the target species and their prey (sediment, reed root, mollusk, arthropods, and common fish species) in both the wintering (Yancheng wetland) and breeding sites (Zhalong wetland) of cranes in China. The maximum concentrations of Pb (130 mg kg(-1) dry weight (dw)) and Cd (10...
May 26, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28545520/the-abundance-of-the-lyme-disease-pathogen-borrelia-afzelii-declines-over-time-in-the-tick-vector-ixodes-ricinus
#4
Maxime Jacquet, Dolores Genné, Alessandro Belli, Elodie Maluenda, Anouk Sarr, Maarten J Voordouw
BACKGROUND: The population dynamics of vector-borne pathogens inside the arthropod vector can have important consequences for vector-to-host transmission. Tick-borne spirochete bacteria of the Borrelia burgdorferi (sensu lato) species complex cause Lyme borreliosis in humans and spend long periods of time (>12 months) in their Ixodes tick vectors. To date, few studies have investigated the dynamics of Borrelia spirochete populations in unfed Ixodes nymphal ticks. METHODS: Larval ticks from our laboratory colony of I...
May 25, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28544438/genome-wide-identification-characterization-and-evolution-of-cuticular-protein-genes-in-the-malaria-vector-anopheles-sinensis-diptera-culicidae
#5
Bai-Qi Liu, Liang Qiao, Qi-Yi He, Yong Zhou, Shuang Ren, Bin Chen
Thirteen cuticular proteins (CPs) families have been recognized in arthropods. In this study, 250 Anopheles sinensis CP genes were identified and named based on genome and transcriptome sequences. They were classified into 10 families based on motifs and phylogenetic analyses. In 11 other insect species, 9 had CP numbers > 150 while Apis mellifera and Tribolium castaneum had CP numbers less than 52. The CPs of 8 species occupied > 1.4% of the total genomic gene number whereas in 3 species the CPs occupied < 1%...
May 24, 2017: Insect Science
https://www.readbyqxmd.com/read/28542621/enzymatic-activity-necessary-to-restore-the-lethality-due-to-escherichia-coli-rnase-e-deficiency-is-distributed-among-bacteria-lacking-rnase-e-homologues
#6
Masaru Tamura, Daisuke Kageyama, Naoko Honda, Hirofumi Fujimoto, Atsushi Kato
Escherichia coli RNase E (Eco-RNase E), encoded by rne (Eco-rne), is considered the global RNA decay initiator. Although Eco-RNase E is an essential gene product in E. coli, some bacterial species, such as Bacillus subtilis, do not possess Eco-RNase E sequence homologues. B. subtilis instead possesses RNase J1/J2 (Bsu-RNase J1/J2) and RNase Y (Bsu-RNase Y) to execute RNA decay. Here we found that E. coli lacking the Eco-rne gene (Δrne E. coli) was viable conditional on M9 minimal media by introducing Bsu-RNase J1/J2 or Bsu-RNase Y...
2017: PloS One
https://www.readbyqxmd.com/read/28542616/regulation-of-acetyl-coa-synthetase-transcription-by-the-crbs-r-two-component-system-is-conserved-in-genetically-diverse-environmental-pathogens
#7
Kristin Jacob, Anna Rasmussen, Paul Tyler, Mariah M Servos, Mariame Sylla, Cecilia Prado, Elizabeth Daniele, Josh S Sharp, Alexandra E Purdy
The CrbS/R two-component signal transduction system is a conserved regulatory mechanism through which specific Gram-negative bacteria control acetate flux into primary metabolic pathways. CrbS/R governs expression of acetyl-CoA synthase (acsA), an enzyme that converts acetate to acetyl-CoA, a metabolite at the nexus of the cell's most important energy-harvesting and biosynthetic reactions. During infection, bacteria can utilize this system to hijack host acetate metabolism and alter the course of colonization and pathogenesis...
2017: PloS One
https://www.readbyqxmd.com/read/28541836/description-of-candidatus-bartonella-fadhilae-n-sp-and-candidatus-bartonella-sanaae-n-sp-bartonellaceae-from-dipodillus-dasyurus-and-sekeetamys-calurus-gerbillinae-from-the-sinai-massif-egypt
#8
Mohammed Alsarraf, Eman M E Mohallal, Ewa J Mierzejewska, Jolanta Behnke-Borowczyk, Renata Welc-Falęciak, Małgorzata Bednarska, Lukasz Dziewit, Samy Zalat, Francis Gilbert, Jerzy M Behnke, Anna Bajer
Bartonella spp. are parasites of mammalian erythrocytes and endothelial cells, transmitted by blood-feeding arthropod ectoparasites. Different species of rodents may constitute the main hosts of Bartonella, including several zoonotic species of Bartonella. The aim of this study was to identify and compare Bartonella species and genotypes isolated from rodent hosts from the South Sinai, Egypt. Prevalence of Bartonella infection was assessed in rodents (837 Acomys dimidiatus, 73 Acomys russatus, 111 Dipodillus dasyurus, and 65 Sekeetamys calurus) trapped in 2000, 2004, 2008, and 2012 in four dry montane wadis around St...
May 25, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28539654/quasispecies-composition-and-evolution-of-a-typical-zika-virus-clinical-isolate-from-suriname
#9
Sander van Boheemen, Ali Tas, S Yahya Anvar, Rebecca van Grootveld, Irina C Albulescu, Martijn P Bauer, Mariet C Feltkamp, Peter J Bredenbeek, Martijn J van Hemert
The arthropod-borne Zika virus (ZIKV) is currently causing a major international public health threat in the Americas. This study describes the isolation of ZIKV from the plasma of a 29-year-old female traveler that developed typical symptoms, like rash, fever and headache upon return from Suriname. The complete genome sequence including the 5' and 3' untranslated regions was determined and phylogenetic analysis showed the isolate clustering within the Asian lineage, close to other viruses that have recently been isolated in the Americas...
May 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28539443/heparan-sulfate-proteoglycan-is-an-important-attachment-factor-for-cell-entry-of-akabane-and-schmallenberg-viruses
#10
Shin Murakami, Akiko Takenaka-Uema, Tomoya Kobayashi, Kentaro Kato, Masayuki Shimojima, Massimo Palmarini, Taisuke Horimoto
Akabane (AKAV) and Schmallenberg (SBV) viruses are Orthobunyavirus transmitted by arthropod vectors with a broad cellular tropism in vitro as well as in vivo Both AKAV and SBV cause arthrogryposis-hydranencephaly syndrome in ruminants. The main cellular receptor and attachment factor for entry of these orthobunyaviruses are unknown. Here, we found that AKAV and SBV infections were inhibited by the addition of heparin or enzymatic removal of cell surface heparan sulfates. To confirm this finding, we prepared heparan sulfate proteoglycan (HSPG)-knockout (KO) cells by using a CRISPR/Cas9 system and measured the binding quantities of these viruses to cell surfaces...
May 24, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28538664/abiotic-and-biotic-factors-regulating-inter-kingdom-engagement-between-insects-and-microbe-activity-on-vertebrate-remains
#11
REVIEW
Heather R Jordan, Jeffery K Tomberlin
Abstract: A number of abiotic and biotic factors are known to regulate arthropod attraction, colonization, and utilization of decomposing vertebrate remains. Such information is critical when assessing arthropod evidence associated with said remains in terms of forensic relevance. Interactions are not limited to just between the resource and arthropods. There is another biotic factor that has been historically overlooked; however, with the advent of high-throughput sequencing, and other molecular techniques, the curtain has been pulled back to reveal a microscopic world that is playing a major role with regards to carrion decomposition patterns in association with arthropods...
May 24, 2017: Insects
https://www.readbyqxmd.com/read/28536678/the-role-and-mechanism-of-erythrocyte-invasion-by-francisella-tularensis
#12
Deanna M Schmitt, Rebecca Barnes, Taylor Rogerson, Ashley Haught, Leanne K Mazzella, Matthew Ford, Tricia Gilson, James W-M Birch, Anders Sjöstedt, Douglas S Reed, Jonathan M Franks, Donna B Stolz, James Denvir, Jun Fan, Swanthana Rekulapally, Donald A Primerano, Joseph Horzempa
Francisella tularensis is an extremely virulent bacterium that can be transmitted naturally by blood sucking arthropods. During mammalian infection, F. tularensis infects numerous types of host cells, including erythrocytes. As erythrocytes do not undergo phagocytosis or endocytosis, it remains unknown how F. tularensis invades these cells. Furthermore, the consequence of inhabiting the intracellular space of red blood cells (RBCs) has not been determined. Here, we provide evidence indicating that residing within an erythrocyte enhances the ability of F...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28534089/comparison-of-microbiomes-between-red-poultry-mite-populations-dermanyssus-gallinae-predominance-of-bartonella-like-bacteria
#13
Jan Hubert, Tomas Erban, Jan Kopecky, Bruno Sopko, Marta Nesvorna, Martina Lichovnikova, Sabine Schicht, Christina Strube, Olivier Sparagano
Blood feeding red poultry mites (RPM) serve as vectors of pathogenic bacteria and viruses among vertebrate hosts including wild birds, poultry hens, mammals, and humans. The microbiome of RPM has not yet been studied by high-throughput sequencing. RPM eggs, larvae, and engorged adult/nymph samples obtained in four poultry houses in Czechia were used for microbiome analyses by Illumina amplicon sequencing of the 16S ribosomal RNA (rRNA) gene V4 region. A laboratory RPM population was used as positive control for transcriptome analysis by pyrosequencing with identification of sequences originating from bacteria...
May 22, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28533374/unique-clade-of-alphaproteobacterial-endosymbionts-induces-complete-cytoplasmic-incompatibility-in-the-coconut-beetle
#14
Shun-Ichiro Takano, Midori Tuda, Keiji Takasu, Naruto Furuya, Yuya Imamura, Sangwan Kim, Kosuke Tashiro, Kazuhiro Iiyama, Matias Tavares, Acacio Cardoso Amaral
Maternally inherited bacterial endosymbionts in arthropods manipulate host reproduction to increase the fitness of infected females. Cytoplasmic incompatibility (CI) is one such manipulation, in which uninfected females produce few or no offspring when they mate with infected males. To date, two bacterial endosymbionts, Wolbachia and Cardinium, have been reported as CI inducers. Only Wolbachia induces complete CI, which causes 100% offspring mortality in incompatible crosses. Here we report a third CI inducer that belongs to a unique clade of Alphaproteobacteria detected within the coconut beetle, Brontispa longissima This beetle comprises two cryptic species, the Asian clade and the Pacific clade, which show incompatibility in hybrid crosses...
May 22, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28530186/synthesis-and-characterisation-of-neem-leaf-extract-2-3-dehydrosalanol-and-quercetin-dihydrate-mediated-silver-nano-particles-for-therapeutic-applications
#15
Bodaballa Avinash, Ravipati Venu, Tollamadugu N V K V Prasad, Mekapogu Alpha Raj, Kothapalli Srinivasa Rao, Chintamaneni Srilatha
The utility of green silver nanoparticles (AgNPs) in veterinary medicine is steadily increasing as they have many therapeutic applications against pathogens and arthropods of livestock. In this study, green AgNPs using neem (N-AgNPs), 2,3-dehydrosalanol (2,3-DHS-AgNPs) and quercetin dihydrate (QDH-AgNPs) were synthesised and characterised. Synthesised compounds were characterised by UV-Vis spectroscopy and the peak absorbance was recorded at 370 nm for neem extract. For N-AgNPs, 2,3-DHS-AgNPs and QDH-AgNPs, the maximum absorbance peaks were at 430, 230 and 220 nm, respectively...
June 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/28528654/natural-radionuclides-and-stable-elements-in-weaver-ants-oecophylla-smaragdina-from-tropical-northern-australia
#16
Peter Medley, Che Doering, Fiona Evans, Andreas Bollhöfer
Natural radionuclides and stable elements were measured in weaver ants, leaves and soils collected from three sites in tropical northern Australia. Radionuclide concentration ratios for ants relative to soil were derived from the measurements and used to refine the current environmental radiological assessment for remediation of Ranger uranium mine. Use of site-specific concentration ratios for weaver ants gave a more conservative estimate of environmental exposure to the arthropod wildlife group than use of default concentration ratios in the ERICA Tool...
May 18, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28528531/diversity-and-distribution-of-ticks-from-domestic-ruminants-in-lebanon
#17
Mayssaa Fawaz Dabaja, Maria Tempesta, Ali Bayan, Gesualdo Vesco, Grazia Greco, Grazia Greco, Alessandra Torina, Valeria Blanda, Francesco La Russa, Salvatore Scimeca, Rossella Lelli, Mohamad Ezzedine, Hussein Mortada, Didier Raoult, Pierre Edouard Fournier, Mohamad Mortada
Ticks (Acari: Ixodidae) are ectoparasites infesting livestock in every geographic area in the world and they are vectors of several viral, bacterial, and protozoan pathogens to animals and humans worldwide. A deep knowledge of the geographical distribution of these arthropods would have a key role in the control of tick-borne diseases. Few data are available about tick presence in domestic ruminants in Lebanon. The study aimed at providing an analysis of tick presence and distribution in Lebanon. Ticks were collected from cattle, sheep, and goats farms distributed in 6 Lebanese provinces between June and September 2014...
April 11, 2017: Veterinaria Italiana
https://www.readbyqxmd.com/read/28526946/evolutionary-ecology-of-multitrophic-interactions-between-plants-insect-herbivores-and-entomopathogens
#18
Ikkei Shikano
Plants play an important role in the interactions between insect herbivores and their pathogens. Since the seminal review by Cory and Hoover (2006) on plant-mediated effects on insect-pathogen interactions, considerable progress has been made in understanding the complexity of these tritrophic interactions. Increasing interest in the areas of nutritional and ecological immunology over the last decade have revealed that plant primary and secondary metabolites can influence the outcomes of insect-pathogen interactions by altering insect immune functioning and physical barriers to pathogen entry...
May 19, 2017: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/28526047/the-paradigm-of-eave-tubes-scaling-up-house-improvement-and-optimizing-insecticide-delivery-against-disease-transmitting-mosquitoes
#19
Fredros Okumu
Control of mosquito-borne diseases is greatly compromised by spread of insecticide resistance, high implementation costs and sub-optimal compliance among users. Improved housing has potential to reduce malaria transmission nearly as much as long-lasting insecticide-treated nets (LLINs), while also preventing other arthropod-borne diseases and improving overall well-being. Yet, it is hardly promoted as mainstream intervention, partly because of high costs, minimal communal benefits to people in non-improved houses, and low scalability...
May 19, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28525620/cold-hardiness-of-the-black-soldier-fly-diptera-stratiomyidae
#20
Thomas Spranghers, Annelies Noyez, Kristof Schildermans, Patrick De Clercq
The black soldier fly, Hermetia illucens (L.), shows potential as a resource for animal feed. However, industrial production in regions where the insect is not native, like northwestern Europe, could lead to permanent establishment, which might entail environmental risks. In temperate climates, establishment depends on the insect's ability to overwinter. This study assessed the insect's cold hardiness by determining the supercooling point (SCP) and lower lethal time at 5 °C (LTime10,50,90) for different life stages...
May 19, 2017: Journal of Economic Entomology
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