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https://www.readbyqxmd.com/read/29352084/detection-of-human-bocavirus-species-2-and-3-in-bivalve-shellfish-in-italy
#1
G La Rosa, G Purpari, A Guercio, S Di Bella, F Gucciardi, Y T R Proroga, M Pisanu, S Della Libera, M Iaconelli, E Suffredini
Human bocavirus (HBoV) has been shown to be a common cause of respiratory infections and gastroenteritis in children. Recently, HBoVs have been detected in sewage and river waters in Italy and worldwide. However, no studies are yet available on their presence in other water environments and in bivalve molluscs.In this study, 316 bivalve shellfish samples collected in three Italian regions over a six-year period (2012-2017) were analyzed by nested PCR and sequencing using broad-range primer pairs targeting the capsid proteins VP1/VP2 of HBoV...
January 19, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29351888/distribution-and-availability-of-mercury-and-methylmercury-in-different-waters-from-the-rio-madeira-basin-amazon
#2
Miguel Vieira, José V E Bernardi, José G Dórea, Bruno C P Rocha, Romulo Ribeiro, Luis F Zara
Waters from the Amazon Basin have distinct physicochemical characteristics that can be optically classified as "black", "clear" and "white". We studied the distribution of total-Hg (THg) and methyl-Hg (MeHg) in these waters and respective suspended solids, sediment, phytoplankton, zooplankton, and benthic macroinvertebrates (BM) in the Madeira River Basin. Compared with the other types of water, the more acidic "black" kind had the highest THg and MeHg concentrations. The trend (black > clear > white) occurred for the concentrations of THg and MeHg in sediments and in the biotic compartment (plankton, macroinvertebrates)...
January 16, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29351813/integrated-biogeography-of-planktonic-and-sedimentary-bacterial-communities-in-the-yangtze-river
#3
Tang Liu, An Ni Zhang, Jiawen Wang, Shufeng Liu, Xiaotao Jiang, Chenyuan Dang, Tao Ma, Sitong Liu, Qian Chen, Shuguang Xie, Tong Zhang, Jinren Ni
BACKGROUND: Bacterial communities are essential to the biogeochemical cycle in riverine ecosystems. However, little is presently known about the integrated biogeography of planktonic and sedimentary bacterial communities in large rivers. RESULTS: This study provides the first spatiotemporal pattern of bacterial communities in the Yangtze River, the largest river in Asia with a catchment area of 1,800,000 km2. We find that sedimentary bacteria made larger contributions than planktonic bacteria to the bacterial diversity of the Yangzte River ecosystem with the sediment subgroup providing 98...
January 19, 2018: Microbiome
https://www.readbyqxmd.com/read/29351741/risk-factors-for-mycobacterium-ulcerans-infection-buruli-ulcer-in-togo-%C3%A2-a-case-control-study-in-zio-and-yoto-districts-of-the-maritime-region
#4
Issaka Maman, Tchadjobo Tchacondo, Abiba Banla Kere, Ebekalisai Piten, Marcus Beissner, Yiragnima Kobara, Komlan Kossi, Kossi Badziklou, Franz Xaver Wiedemann, Komi Amekuse, Gisela Bretzel, Damintoti Simplice Karou
BACKGROUND: Buruli ulcer (BU) is a neglected mycobacterial skin infection caused by Mycobacterium ulcerans. This disease mostly affects poor rural populations, especially in areas with low hygiene standards and sanitation coverage. The objective of this study was to identify these risk factors in the districts of Zio and Yoto of the Maritime Region in Togo. METHODS: We conducted a case-control study in Zio and Yoto, two districts proved BU endemic from November 2014 to May 2015...
January 19, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29351273/understanding-the-legal-trade-of-cattle-and-camels-and-the-derived-risk-of-rift-valley-fever-introduction-into-and-transmission-within-egypt
#5
Sebastian Napp, Veronique Chevalier, Núria Busquets, Paolo Calistri, Jordi Casal, Mohamed Attia, Rehab Elbassal, Heba Hosni, Hatem Farrag, Noura Hassan, Rasha Tawfik, Sohair Abd Elkader, Shahin Bayomy
Rift Valley Fever (RVF) is a mosquito-borne zoonosis, which may cause significant losses for the livestock sector and have serious public health implications. Egypt has been repeatedly affected by RVF epidemics, mainly associated to the importation of animals from sub-Saharan countries, where the disease is endemic. The objective of our study was the improvement of the surveillance and control strategies implemented in Egypt. In order to do that, first we evaluated the legal trade of live animals into and within Egypt...
January 19, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29351077/molecular-and-morphological-characterisation-of-rhabdias-picardiae-junker-lhermitte-vallarino-et-bain-2010-nematoda-rhabdiasidae-from-delaland-s-river-frog-amietia-delalandii-dum%C3%A3-ril-et-bibron-1841-amphibia-pyxicephalidae-in-south-africa
#6
Roman Svitin, Yuriy Kuzmin, Louis du Preez
Rhabdias picardiae previously known from the Guttural Toad, Sclerophrys gutturalis (Bufonidae) is described from a new host, Delaland's River Frog, Amietia delalandii (Pyxicephalidae). The species identification is confirmed by analysis of the COI gene sequence and morphological comparison with the original description. Morphological details of apical structures in adult parasitic R. picardiae, namely, the shape and position of lips, the number and position of external labial papillae, and the buccal capsule morphology are described using light and scanning electron microscopy...
March 26, 2018: Acta Parasitologica
https://www.readbyqxmd.com/read/29351062/phylogeny-and-cocoon-production-in-the-parasitic-leech-myzobdella-lugubris-leidy-1851-hirudinidae-piscicolidae
#7
Naim Saglam, Ralph Saunders, Shirley A Lang, Daniel H Shain
Myzobdella lugubris is a commensal leech on crustaceans and a parasite to fishes, surviving predominantly in brackish waters throughout North America. Specimens in this study were collected within the tidal zone of the Delaware River basin (New Jersey and Pennsylvania). To compare regional M. lugubris specimens, defined characters were scored after dorsal and ventral dissections, and phylogenetic relationships were resolved using cytochrome c oxidase subunit 1 (CO1), 12S ribosomal RNA (rDNA) and 18S rDNA gene fragments...
March 26, 2018: Acta Parasitologica
https://www.readbyqxmd.com/read/29350414/ross-river-virus-in-australian-blood-donors-possible-implications-for-blood-transfusion-safety
#8
Helen M Faddy, Thu V Tran, Veronica C Hoad, Clive R Seed, Elvina Viennet, Hiu-Tat Chan, Robert Harley, Elise Hewlett, Roy A Hall, Helle Bielefeldt-Ohmann, Robert L P Flower, Natalie A Prow
BACKGROUND: Emerging transfusion-transmissible pathogens, including arboviruses such as West Nile, Zika, dengue, and Ross River viruses, are potential threats to transfusion safety. The most prevalent arbovirus in humans in Australia is Ross River virus (RRV); however, prevalence varies substantially around the country. Modeling estimated a yearly risk of 8 to 11 potentially RRV-viremic fresh blood components nationwide. This study aimed to measure the occurrence of RRV viremia among donors who donated at Australian collection centers located in areas with significant RRV transmission during one peak season...
January 19, 2018: Transfusion
https://www.readbyqxmd.com/read/29350293/diversity-and-enzymatic-potentialities-of-bacillus-sp-strains-isolated-from-a-polluted-freshwater-ecosystem-in-cuba
#9
Jeny Adina Larrea-Murrell, Marcia Maria Rojas-Badia, Ivette García-Soto, Beatriz Romeu-Alvarez, Tristano Bacchetti, Annika Gillis, Ana Karina Boltes-Espinola, Mayra Heydrich-Perez, Daysi Lugo-Moya, Jacques Mahillon
Genotypic and phenotypic characterization of Bacillus spp. from polluted freshwater has been poorly addressed. The objective of this research was to determine the diversity and enzymatic potentialities of Bacillus spp. strains isolated from the Almendares River. Bacilli strains from a polluted river were characterized by considering the production of extracellular enzymes using API ZYM. 14 strains were selected and identified using 16S rRNA, gyrB and aroE genes. Genotypic diversity of the Bacillus spp. strains was evaluated using pulsed field gel electrophoresis...
January 19, 2018: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/29350150/role-of-environmental-factors-in-shaping-spatial-distribution-of-salmonella-enterica-serovar-typhi-fiji
#10
Ruklanthi de Alwis, Conall Watson, Birgit Nikolay, John H Lowry, Nga Tran Vu Thieu, Tan Trinh Van, Dung Tran Thi Ngoc, Kitione Rawalai, Mere Taufa, Jerimaia Coriakula, Colleen L Lau, Eric J Nilles, W John Edmunds, Mike Kama, Stephen Baker, Jorge Cano
Fiji recently experienced a sharp increase in reported typhoid fever cases. To investigate geographic distribution and environmental risk factors associated with Salmonella enterica serovar Typhi infection, we conducted a cross-sectional cluster survey with associated serologic testing for Vi capsular antigen-specific antibodies (a marker for exposure to Salmonella Typhi in Fiji in 2013. Hotspots with high seroprevalence of Vi-specific antibodies were identified in northeastern mainland Fiji. Risk for Vi seropositivity increased with increased annual rainfall (odds ratio [OR] 1...
February 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29349913/eukaryotic-phytoplankton-community-spatiotemporal-dynamics-as-identified-through-gene-expression-within-a-eutrophic-estuary
#11
Weida Gong, Hans Paerl, Adrian Marchetti
Over the span of a year, we investigated the interactions between biotic and abiotic factors within the eutrophic Neuse River Estuary (NRE). Through metatranscriptomic sequencing in combination with water quality measurements, we show that there are different metabolic strategies deployed along the NRE. In the upper estuary, taxonomically-resolved phytoplankton groups express more transcripts of genes for synthesis of cellular components and carbon metabolism whereas in the lower estuary, transcripts allocated to nutrient metabolism and transport were more highly expressed...
January 19, 2018: Environmental Microbiology
https://www.readbyqxmd.com/read/29349736/application-of-experimental-design-for-the-optimization-of-artificial-neural-network-based-water-quality-model-a-case-study-of-dissolved-oxygen-prediction
#12
Aleksandra Šiljić Tomić, Davor Antanasijević, Mirjana Ristić, Aleksandra Perić-Grujić, Viktor Pocajt
This paper presents an application of experimental design for the optimization of artificial neural network (ANN) for the prediction of dissolved oxygen (DO) content in the Danube River. The aim of this research was to obtain a more reliable ANN model that uses fewer monitoring records, by simultaneous optimization of the following model parameters: number of monitoring sites, number of historical monitoring data (expressed in years), and number of input water quality parameters used. Box-Behnken three-factor at three levels experimental design was applied for simultaneous spatial, temporal, and input variables optimization of the ANN model...
January 18, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29349109/data-collected-in-an-integrated-ecological-survey-of-rotifer-communities-and-corresponding-environmental-variables-in-the-highly-polluted-haihe-river-basin-china
#13
Wei Xiong, Jie Li, Yuzhan Yang, Weimin Wang, Baoqing Shan, Aibin Zhan
Here we presented two datasets (biological and environmental datasets) collected in a comprehensive large geographical scale (approximately 1.1×105 km2) survey of rivers/streams in the Haihe River Basin (HRB), which has become the most polluted river basin in past two decades in China. The survey selected a total of 94 representative sampling sites in the plain region of HRB, where environmental pollution is more severe than the mountain region. The biological dataset contains the information on the identified rotifer species and their abundance, while the environmental dataset provides the measured environmental variables at each sampling site...
April 2018: Data in Brief
https://www.readbyqxmd.com/read/29348338/draft-genome-sequence-of-a-novel-bacterium-pseudomonas-sp-strain-mr-02-capable-of-pyomelanin-production-isolated-from-the-mahananda-river-at-siliguri-west-bengal-india
#14
Vivek Kumar Ranjan, Tilak Saha, Shriparna Mukherjee, Ranadhir Chakraborty
The draft genome sequence of a novel strain, Pseudomonas sp. MR 02, a pyomelanin-producing bacterium isolated from the Mahananda River at Siliguri, West Bengal, India, is reported here. This strain has a genome size of 5.94 Mb, with an overall G+C content of 62.6%. The draft genome reports 5,799 genes (mean gene length, 923 bp), among which 5,503 are protein-coding genes, including the genes required for the catabolism of tyrosine or phenylalanine for the characteristic production of homogentisic acid (HGA)...
January 18, 2018: Genome Announcements
https://www.readbyqxmd.com/read/29347796/headward-growth-and-branching-in-subterranean-channels
#15
Arshad Kudrolli, Nikolay Ionkin, Andreea Panaitescu
We investigate the erosive growth of channels in a thin subsurface sedimentary layer driven by hydrodynamic drag toward understanding subterranean networks and their relation to river networks charged by ground water. Building on a model based on experimental observations of fluid-driven evolution of bed porosity, we focus on the characteristics of the channel growth and their bifurcations in a horizontal rectangular domain subject to various fluid source and sink distributions. We find that the erosion front between low- and high-porosity regions becomes unstable, giving rise to branched channel networks, depending on the spatial fluctuations of the fluid flow near the front and the degree to which the flow is above the erodibility threshold of the medium...
November 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347385/organization-and-scaling-in-water-supply-networks
#16
Likwan Cheng, Bryan W Karney
Public water supply is one of the society's most vital resources and most costly infrastructures. Traditional concepts of these networks capture their engineering identity as isolated, deterministic hydraulic units, but overlook their physics identity as related entities in a probabilistic, geographic ensemble, characterized by size organization and property scaling. Although discoveries of allometric scaling in natural supply networks (organisms and rivers) raised the prospect for similar findings in anthropogenic supplies, so far such a finding has not been reported in public water or related civic resource supplies...
December 2017: Physical Review. E
https://www.readbyqxmd.com/read/29346305/the-sustainable-development-assessment-of-reservoir-resettlement-based-on-a-bp-neural-network
#17
Li Huang, Jian Huang, Wei Wang
Resettlement affects not only the resettlers' production activities and life but also, directly or indirectly, the normal operation of power stations, the sustainable development of the resettlers, and regional social stability. Therefore, a scientific evaluation index system for the sustainable development of reservoir resettlement must be established that fits Chinese national conditions and not only promotes reservoir resettlement research but also improves resettlement practice. This essay builds an evaluation index system for resettlers' sustainable development based on a back-propagation (BP) neural network, which can be adopted in China, taking the resettlement necessitated by step hydropower stations along the Wujiang River cascade as an example...
January 18, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29344698/concentrations-of-cadmium-copper-and-zinc-in-macrobrachium-rosenbergii-giant-freshwater-prawn-from-natural-environment
#18
Farah Akmal Idrus, Masania Mohd Basri, Khairul Adha A Rahim, Nur Syazwani Abd Rahim, Melissa Dennis Chong
This study analyzed the levels of cadmium (Cd), copper (Cu), and zinc (Zn) by the flame atomic absorption spectrophotometer (FAAS), in the muscle tissues, exoskeletons, and gills from freshwater prawn (Macrobrachium rosenbergii) (n = 20) harvested from natural habitat in Kerang River, Malaysia on 25th November 2015. Significant increase of the metals level in muscle tissue and gill (r > 0.70, p < 0.05) were observed with increase in length except for Cu in gills. No relationship was found between metals level in exoskeleton and length...
January 17, 2018: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29343830/biological-rejuvenation-of-iron-oxides-in-bioturbated-marine-sediments
#19
Jacob P Beam, Jarrod J Scott, Sean M McAllister, Clara S Chan, James McManus, Filip J R Meysman, David Emerson
The biogeochemical cycle of iron is intricately linked to numerous element cycles. Although biological processes that catalyze the reductive side of the iron cycle are established, little is known about microbial oxidative processes on iron cycling in sedimentary environments-resulting in the formation of iron oxides. Here we show that a potential source of sedimentary iron oxides originates from the metabolic activity of iron-oxidizing bacteria from the class Zetaproteobacteria, presumably enhanced by burrowing animals in coastal sediments...
January 17, 2018: ISME Journal
https://www.readbyqxmd.com/read/29343796/integrated-climate-chemical-indicators-of-diffuse-pollution-from-land-to-water
#20
Per-Erik Mellander, Phil Jordan, Marianne Bechmann, Ophélie Fovet, Mairead M Shore, Noeleen T McDonald, Chantal Gascuel-Odoux
Management of agricultural diffuse pollution to water remains a challenge and is influenced by the complex interactions of rainfall-runoff pathways, soil and nutrient management, agricultural landscape heterogeneity and biogeochemical cycling in receiving water bodies. Amplified cycles of weather can also influence nutrient loss to water although they are less considered in policy reviews. Here, we present the development of climate-chemical indicators of diffuse pollution in highly monitored catchments in Western Europe...
January 17, 2018: Scientific Reports
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