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https://www.readbyqxmd.com/read/29150701/process-development-of-oxalic-acid-production-in-submerged-culture-of-aspergillus-niger-f22-and-its-biocontrol-efficacy-against-the-root-knot-nematode-meloidogyne-incognita
#1
Sang Il Lee, Keon Jin Lee, Ho Hyun Chun, Sanghyun Ha, Hyun Jung Gwak, Ho Myeong Kim, Jong-Hee Lee, Hak-Jong Choi, Hyeong Hwan Kim, Teak Soo Shin, Hae Woong Park, Jin-Cheol Kim
Oxalic acid has potent nematicidal activity against the root-knot nematode Meloidogyne incognita. In this study, fermentation parameters for oxalic acid production in submerged culture of Aspergillus niger F22 at 23, 25, and 30 °C were optimized in 5-L jar fermenters. The viscosity of the culture broth increased with increasing temperature. There was a negative correlation between oxalic acid production and the apparent viscosity; high volumetric productivity of oxalic acid was obtained at low apparent viscosity (less than 1000 cP), with a productivity of more than 100 mg/L h...
November 17, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/29150386/role-of-endosymbionts-in-insect-parasitic-nematode-interactions
#2
REVIEW
Ioannis Eleftherianos, Shruti Yadav, Eric Kenney, Dustin Cooper, Yaprak Ozakman, Jelena Patrnogic
Endosymbiotic bacteria exist in many animals where they develop relationships that affect certain physiological processes in the host. Insects and their nematode parasites form great models for understanding the genetic and molecular basis of immune and parasitic processes. Both organisms contain endosymbionts that possess the ability to interfere with certain mechanisms of immune function and pathogenicity. This review summarizes recent information on the involvement of insect endosymbionts in the response to parasitic nematode infections, and the influence of nematode endosymbionts on specific aspects of the insect immune system...
November 14, 2017: Trends in Parasitology
https://www.readbyqxmd.com/read/29145472/replacing-methyl-bromide-with-a-combination-of-1-3-dichloropropene-and-metam-sodium-for-cucumber-production-in-china
#3
Liangang Mao, Hongyun Jiang, Lan Zhang, Yanning Zhang, Muhammad Umair Sial, Haitao Yu, Aocheng Cao
The combination of 1,3-dichloropropene (1,3-D) and metam sodium (MNa) is a potential resource to replace methyl bromide (MB) as a soil fumigant. The efficacy of 1,3-D+MNa as a crucial factor to limit soil-borne pests was evaluated in one laboratory experiment and two cucumber greenhouse studies conducted in commercial operations. Laboratory results revealed that 1,3-D and MNa (10+20 mg a.i. kg-1 soil) provided the best complementary control of the root-knot nematode, Fusarium oxysporum and two species of weed seeds...
2017: PloS One
https://www.readbyqxmd.com/read/29145392/conservation-of-a-microrna-cluster-in-parasitic-nematodes-and-profiling-of-mirnas-in-excretory-secretory-products-and-microvesicles-of-haemonchus-contortus
#4
Henry Y Gu, Neil D Marks, Alan D Winter, William Weir, Thomas Tzelos, Tom N McNeilly, Collette Britton, Eileen Devaney
microRNAs are small non-coding RNAs that are important regulators of gene expression in a range of animals, including nematodes. We have analysed a cluster of four miRNAs from the pathogenic nematode species Haemonchus contortus that are closely linked in the genome. We find that the cluster is conserved only in clade V parasitic nematodes and in some ascarids, but not in other clade III species nor in clade V free-living nematodes. Members of the cluster are present in parasite excretory-secretory products and can be detected in the abomasum and draining lymph nodes of infected sheep, indicating their release in vitro and in vivo...
November 16, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29144756/controlling-graphene-bio-interface-dispersions-in-animal-sera-for-enhanced-stability-and-reduced-toxicity
#5
Ajith Pattammattel, Paritosh Pande, Deepa Kuttappan, Megan Puglia, Ashis K Basu, Mary Amalaradjou, Challa V Kumar
Controlling the graphene-bio interface is important for biological applications of graphene, which is touted as the wonder material of the new century. Graphene samples made in animal sera indicated low toxicity to cells and nematodes, due to the adsorption of the serum proteins on the nascent graphene sheets. The graphite samples were exfoliated in 6 different animal sera, using three different methods, shear reactor, the kitchen blender and by ultrasonication, and maximum efficiency was noted with the kitchen blender...
November 16, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29144215/a-filtration-based-rapid-test-using-a-partially-purified-third-stage-larval-antigen-to-detect-specific-antibodies-for-the-diagnosis-of-gnathostomiasis
#6
A Ma, Y Wang, X L Liu, H M Zhang, P Eamsobhana, H S Yong, X X Gan
Human gnathostomiasis is an emerging food-borne parasitic disease caused by nematodes of the genus Gnathostoma. Currently, serological tests are commonly applied to support clinical diagnosis. In the present study, a simple and rapid filtration-based test, dot immune-gold filtration assay (DIGFA) was developed using a partially purified antigen of Gnathostoma third-stage larvae (L3). A total of 180 serum samples were tested to evaluate the diagnostic potential of DIGFA for gnathostomiasis. The diagnostic sensitivity and specificity were 96...
November 16, 2017: Journal of Helminthology
https://www.readbyqxmd.com/read/29143265/is-caenorhabditis-elegans-representative-of-freshwater-nematode-species-in-toxicity-testing
#7
Arne Haegerbaeumer, Sebastian Höss, Peter Heininger, Walter Traunspurger
Multi-species toxicity tests were conducted using a broad range of freshwater nematode species to assess interspecific differences in sensitivity to chemical stress and to compare the toxicity to that on the standard test organism Caenorhabditis elegans. The lethal effects of nine different chemical treatments, including metals and polycyclic aromatic hydrocarbons (PAHs) in single and mixture application, were determined for nematodes exposed for 48 h to spiked aqueous solutions. The investigated freshwater nematodes exhibited distinct differences in their sensitivity...
November 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29143232/assessment-of-gastrointestinal-nematode-infection-anthelmintic-usage-and-husbandry-practices-on-two-small-scale-goat-farms-in-malaysia
#8
Flora Wong, Neil Sargison
Haemonchosis is a common problem on goat farms in tropical countries such as Malaysia. Prevention of production losses generally depends on the use of anthelmintic drugs, but is threatened by the emergence of anthelmintic resistance. This study investigates anthelmintic efficacy on small-scale Malaysian goat farms and describes putative risk factors. Adult goats had moderate to high pre-treatment faecal trichostrongyle egg counts, despite being housed on slatted floors and fed on cut-and-carry forage, raising questions about the source of nematode infection...
November 15, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/29142433/prosopis-juliflora-pods-alkaloid-rich-fraction-in-vitro-anthelmintic-activity-on-goat-gastrointestinal-parasites-and-its-cytotoxicity-on-vero-cells
#9
Helimar Gonçalves Lima, Danilo Cavalcante Gomes, Nathália Silva Santos, Êuder Reis Dias, Mariana Borges Botura, Maria José Moreira Batatinha, Alexsandro Branco
Background: This study was designed to assess the in vitro anthelmintic activity of the fraction containing alkaloid from Prosopis juliflora pods on goat gastrointestinal nematodes using the egg hatch assay (EHA), larval migration inhibition assay (LMIA), and larval motility assay (LMA). Materials and Methods: The alkaloid-rich fraction (AF) - content juliprosopine as major alkaloid - was obtained from ethyl acetate extract after fractionation in Sephadex LH-20 chromatography column and its characterization were made by nuclear magnetic resonance analysis together with literature data comparison...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29141741/a-hospital-based-study-of-intestinal-capillariasis-in-thailand-clinical-features-potential-clues-for-diagnosis-and-epidemiological-characteristics-of-85-patients
#10
Lakkhana Sadaow, Oranuch Sanpool, Pewpan M Intapan, Watana Sukeepaisarnjaroen, Thidarat K Prasongdee, Wanchai Maleewong
Intestinal capillariasis caused by Capillaria philippinensis, a fish-borne nematode, is an important, emerging zoonotic helminthiasis. Cases may be fatal if suitable treatment is not administered in time. We reported a hospital-based study of 85 cases in Thailand, most of which were in the northeast. All patients had a history of eating raw or insufficiently cooked fresh water fish or prawns. The clinical manifestations are characterized by chronic diarrhea, borborygmi, abdominal pain, marked weight loss, muscle weakness, fatigue, dizziness, anorexia, and edema, as well as protein and electrolyte loss...
October 23, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29141050/differential-immunomodulation-in-human-monocytes-versus-macrophages-by-filarial-cystatin
#11
Gopinath Venugopal, Marion Mueller, Susanne Hartmann, Svenja Steinfelder
Parasitic nematodes have evolved powerful immunomodulatory molecules to enable their survival in immunocompetent hosts by subverting immune responses and minimizing pathological processes. One filarial molecule known to counteract host immune responses by inducing IL-10 and regulatory macrophages in mice is filarial cystatin. During a patent filarial infection monocytes encounter microfilariae in the blood, an event that occurs in asymptomatically infected filariasis patients that are immunologically hyporeactive...
2017: PloS One
https://www.readbyqxmd.com/read/29140240/case-report-strongyloides-stercoralis-hyperinfection-in-a-patient-with-chronic-lymphocytic-leukemia
#12
Richelle Guerrero-Wooley, Ernesto Aranda-Aguirre, Wencheng Li, Aimee Wilkin, Elizabeth Palavecino
Strongyloides stercoralis is an intestinal nematode that can cause disseminated infection in an immunocompromised host. It is most commonly acquired in developing countries. It was previously a common infection in many parts of the United States, particularly in the Appalachian region, but is rarely identified currently. Here, we describe a patient born and raised in Appalachia, with no history of travel outside the United States, who presented with chronic lymphocytic leukemia and S. stercoralis hyperinfection characterized by acute respiratory failure, altered mental status, and extended-spectrum-beta-lactamase Klebsiella pneumoniae bacteremia...
November 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29139484/ftir-imaging-detects-diet-and-genotype-dependent-chemical-composition-changes-in-wild-type-and-mutant-c-elegans-strains
#13
A Bouyanfif, S Liyanage, J E Hewitt, S A Vanapalli, N Moustaid-Moussa, E Hequet, N Abidi
This study focuses on the use of Fourier Transform Infrared (FTIR) microspectroscopy to determine chemical changes induced in the nematode Caenorhabditis elegans by supplementation of C. elegans maintenance media (CeMM) by Eicosapentaenoic acid (EPA). Wild-type C. elegans (N2) and mutant strains (tub-1 and fat-3) were grown in CeMM alone, and CeMM supplemented with EPA at 25 or 100 μM. Feeding was performed for 72 h. FTIR imaging was performed in transmission mode on individual worms. The FTIR imaging analysis of wild-type animals revealed the presence of vibrations assigned to unsaturated fatty acids, specifically bands at 3008 cm(-1) ([double bond, length as m-dash]C-H, olefinic stretch) and 1744 cm(-1) (C[double bond, length as m-dash]O, unsaturated fatty acids)...
November 15, 2017: Analyst
https://www.readbyqxmd.com/read/29139069/piloting-the-effectiveness-of-pig-health-education-in-combination-with-oxfendazole-treatment-on-prevention-and-or-control-of-porcine-cysticercosis-gastrointestinal-parasites-african-swine-fever-and-ectoparasites-in-ang%C3%A3-nia-district-mozambique
#14
A G Chilundo, M V Johansen, A Pondja, R Miambo, S Afonso, S Mukaratirwa
A community-based intervention combining health education (HE) and treatment of pigs for control of porcine cysticercosis (PC), gastrointestinal (GI) helminths, African swine fever (ASF) and external parasites was tested involving six villages of resource-poor smallholder pig farmers. Farmers and pigs of six rural villages were randomly allocated into group 1 (HE), which served as controls, and group 2 (HE + OFZ) pigs received a single oral dose of 30 mg/kg OFZ. Farmers were trained in pig health, housing and feeding...
November 14, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/29138647/nodding-syndrome-ns-and-onchocerca-volvulus-ov-in-northern-uganda
#15
David Kitara Lagoro, Denis Anywar Arony
Nodding Syndrome (NS) is a childhood neurological disorder characterized by atonic seizures, cognitive decline, school dropout, muscle weakness, thermal dysfunction, wasting and stunted growth. There are recent published information suggesting associations between Nodding Syndrome (NS) with cerebrospinal fluid (CSF) VGKC antibodies and serum leiomidin-1 antibody cross reacting with Onchocerca Volvulus (OV). These findings suggest a neuro-inflammatory cause of NS and they are important findings in the search for the cause of Nodding Syndrome...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/29138239/expanding-the-chondroitin-glycoproteome-of-caenorhabditis-elegans
#16
Fredrik Noborn, Alejandro Gomez Toledo, Waqas Nasir, Jonas Nilsson, Tabea Dierker, Lena Kjellén, Göran Larson
Chondroitin sulfate proteoglycans (CSPGs) are important structural components of connective tissues in essentially all metazoan organisms. In vertebrates, CSPGs are involved also in more specialized processes such as neurogenesis and growth factor signaling. In invertebrates, however, knowledge of CSPGs core proteins and proteoglycan-related functions is relatively limited, even for Caenorhabditis elegans. This nematode produces large amounts of non-sulfated chondroitin in addition to low-sulfated chondroitin sulfate chains...
November 14, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29136530/microplastic-particles-cause-intestinal-damage-and-other-adverse-effects-in-zebrafish-danio-rerio-and-nematode-caenorhabditis-elegans
#17
Lili Lei, Siyu Wu, Shibo Lu, Mengting Liu, Yang Song, Zhenhuan Fu, Huahong Shi, Kathleen M Raley-Susman, Defu He
Microplastics have been frequently detected in aquatic environments, and there are increasing concerns about potential effects on biota. In this study, zebrafish Danio rerio and nematode Caenorhabditis elegans were used as model organisms for microplastic exposure in freshwater pelagic (i.e. water column) and benthic (i.e. sediment) environments. We investigated the toxic effects of five common types of microplastics: polyamides (PA), polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC) and polystyrene (PS) particles...
November 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29134711/x-exceptionalism-in-caenorhabditis-speciation
#18
Asher D Cutter
Speciation genetics research in diverse organisms shows the X-chromosome to be exceptional in how it contributes to 'rules' of speciation. Until recently, however, the nematode phylum has been nearly silent on this issue, despite the model organism Caenorhabditis elegans having touched most other topics in biology. Studies of speciation with Caenorhabditis accelerated with the recent discovery of species pairs showing partial inter-fertility. The resulting genetic analyses of reproductive isolation in nematodes demonstrate key roles for the X-chromosome in hybrid male sterility and inviability, opening up new understanding of the genetic causes of Haldane's rule, Darwin's corollary to Haldane's rule, and enabling tests of the large-X effect hypothesis...
November 13, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/29133817/transgenic-cavendish-bananas-with-resistance-to-fusarium-wilt-tropical-race-4
#19
James Dale, Anthony James, Jean-Yves Paul, Harjeet Khanna, Mark Smith, Santy Peraza-Echeverria, Fernando Garcia-Bastidas, Gert Kema, Peter Waterhouse, Kerrie Mengersen, Robert Harding
Banana (Musa spp.) is a staple food for more than 400 million people. Over 40% of world production and virtually all the export trade is based on Cavendish banana. However, Cavendish banana is under threat from a virulent fungus, Fusarium oxysporum f. sp. cubense tropical race 4 (TR4) for which no acceptable resistant replacement has been identified. Here we report the identification of transgenic Cavendish with resistance to TR4. In our 3-year field trial, two lines of transgenic Cavendish, one transformed with RGA2, a gene isolated from a TR4-resistant diploid banana, and the other with a nematode-derived gene, Ced9, remain disease free...
November 14, 2017: Nature Communications
https://www.readbyqxmd.com/read/29131839/diversity-and-feeding-strategies-of-soil-microfauna-along-elevation-gradients-in-himalayan-cold-deserts
#20
Miloslav Devetter, Ladislav Háněl, Klára Řeháková, Jiří Doležal
High-elevation cold deserts in Tibet and Himalaya are one of the most extreme environments. One consequence is that the diversity of macrofauna in this environment is often limited, and soil microorganisms have a more influential role in governing key surface and subsurface bioprocesses. High-elevation soil microfauna represent important components of cold ecosystems and dominant consumers of microbial communities. Still little is known about their diversity and distribution on the edge of their reproductive and metabolic abilities...
2017: PloS One
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