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https://www.readbyqxmd.com/read/28427445/parasites-pathogens-and-commensals-in-the-low-impact-non-native-amphipod-host-gammarus-roeselii
#1
Jamie Bojko, Karolina Bącela-Spychalska, Paul D Stebbing, Alison M Dunn, Michał Grabowski, Michał Rachalewski, Grant D Stentiford
BACKGROUND: Whilst vastly understudied, pathogens of non-native species (NNS) are increasingly recognised as important threats to native wildlife. This study builds upon recent recommendations for improved screening for pathogens in NNS by focusing on populations of Gammarus roeselii in Chojna, north-western Poland. At this location, and in other parts of continental Europe, G. roeselii is considered a well-established and relatively 'low-impact' invader, with little understanding about its underlying pathogen profile and even less on potential spill-over of these pathogens to native species...
April 20, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28426751/the-role-of-microsporidian-polar-tube-protein-4-ptp4-in-host-cell-infection
#2
Bing Han, Valérie Polonais, Tatsuki Sugi, Rama Yakubu, Peter M Takvorian, Ann Cali, Keith Maier, Mengxian Long, Matthew Levy, Herbert B Tanowitz, Guoqing Pan, Frédéric Delbac, Zeyang Zhou, Louis M Weiss
Microsporidia have been identified as pathogens that have important effects on our health, food security and economy. A key to the success of these obligate intracellular pathogens is their unique invasion organelle, the polar tube, which delivers the nucleus containing sporoplasm into host cells during invasion. Due to the size of the polar tube, the rapidity of polar tube discharge and sporoplasm passage, and the absence of genetic techniques for the manipulation of microsporidia, study of this organelle has been difficult and there is relatively little known regarding polar tube formation and the function of the proteins making up this structure...
April 20, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28415971/an-evolutionarily-conserved-transcriptional-response-to-viral-infection-in-caenorhabditis-nematodes
#3
Kevin Chen, Carl J Franz, Hongbing Jiang, Yanfang Jiang, David Wang
BACKGROUND: Caenorhabditis elegans is a powerful model organism for probing many biological processes including host-pathogen interactions with bacteria and fungi. The recent identification of nematode viruses that naturally infect C. elegans and Caenorhabditis briggsae provides a unique opportunity to define host-virus interactions in these model hosts. RESULTS: We analyzed the transcriptional response of pathogen infected C. elegans and C. briggsae by RNA-seq...
April 17, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28382652/a-new-promising-phylogenetic-marker-to-study-the-diversity-of-fungal-communities-the-glycoside-hydrolase-63-gene
#4
L Pérez-Izquierdo, E Morin, J P Maurice, F Martin, A Rincón, M Buée
In molecular ecology, the development of efficient molecular markers for fungi remains an important research domain. Nuclear ribosomal internal transcribed spacer (ITS) region was proposed as universal DNA barcode marker for Fungi, but this marker was criticized for idel-induced alignment problems and its potential lack of phylogenetic resolution. Our main aim was to develop a new phylogenetic gene and a putative functional marker, from single-copy gene, to describe fungal diversity. Thus, we developed a series of primers to amplify a polymorphic region of the Glycoside Hydrolase GH63 gene, encoding exo-acting α-glucosidases, in Basidiomycetes...
April 6, 2017: Molecular Ecology Resources
https://www.readbyqxmd.com/read/28372996/parathelohania-iranica-sp-nov-microsporidia-amblyosporidae-infecting-malaria-mosquito-anopheles-superpictus-diptera-culicidae-ultrastructure-and-molecular-characterization
#5
Seyed-Mohammad Omrani, Seyedeh-Fatemeh Moosavi, Effat Farrokhi
Microsporidia are common pathogens of insects and sometimes are considered as a candidate in the biological control of mosquitoes. Recently a microsporidium infection was discovered in Anopheles superpictus (Diptera: Culicidae) larvae, in Iran. The responsible agent belonged to the genus Parathelohania (Microsporidia: Amblyosporidae). This study has been carried out to identify its identity at the species level. Fresh infected larvae were collected from the type locality, Kiar district, in Chahar Mahal and Bakhtiari province, at the central western of Iran...
April 1, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28369437/upregulation-of-a-trypsin-like-serine-protease-gene-in-antheraea-pernyi-lepidoptera-saturniidae-strains-exposed-to-different-pathogens
#6
Ying Sun, Yong Wang, Wei Liu, Jing-Lin Zhou, Jun Zeng, Xiao-Hui Wang, Yi-Ren Jiang, Dong-Hua Li, Li Qin
Antheraea pernyi Guérin-Méneville is used for silk production and as a food resource. Its infection by exogenous pathogens, including microsporidia, fungi, bacteria, and virus, can lead to silkworm diseases, causing major economic losses. A trypsin-like serine protease gene (TLS) was found in A. pernyi transcriptome data resulting from two different infection experiments. The cDNA sequence of ApTLS was 1,020 bp in length and contained an open reading frame of 774 bp encoding a 257-amino acid protein (GenBank KF779933)...
March 25, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28365723/silkpathdb-a-comprehensive-resource-for-the-study-of-silkworm-pathogens
#7
Tian Li, Guo-Qing Pan, Charles R Vossbrinck, Jin-Shan Xu, Chun-Feng Li, Jie Chen, Meng-Xian Long, Ming Yang, Xiao-Fei Xu, Chen Xu, Bettina A Debrunner-Vossbrinck, Ze-Yang Zhou
Silkworm pathogens have been heavily impeding the development of sericultural industry and play important roles in lepidopteran ecology, and some of which are used as biological insecticides. Rapid advances in studies on the omics of silkworm pathogens have produced a large amount of data, which need to be brought together centrally in a coherent and systematic manner. This will facilitate the reuse of these data for further analysis. We have collected genomic data for 86 silkworm pathogens from 4 taxa (fungi, microsporidia, bacteria and viruses) and from 4 lepidopteran hosts, and developed the open-access Silkworm Pathogen Database (SilkPathDB) to make this information readily available...
January 1, 2017: Database: the Journal of Biological Databases and Curation
https://www.readbyqxmd.com/read/28345194/decay-of-the-glycolytic-pathway-and-adaptation-to-intranuclear-parasitism-within-enterocytozoonidae-microsporidia
#8
Dominic Wiredu Boakye, Pattana Jaroenlak, Anuphap Prachumwat, Tom A Williams, Kelly S Bateman, Ornchuma Itsathitphaisarn, Kallaya Sritunyalucksana, Konrad H Paszkiewicz, Karen A Moore, Grant D Stentiford, Bryony A P Williams
Glycolysis and oxidative phosphorylation are the fundamental pathways of ATP generation in eukaryotes. Yet in microsporidia, endoparasitic fungi living at the limits of cellular streamlining, oxidative phosphorylation has been lost: energy is obtained directly from the host or, during the dispersive spore stage, via glycolysis. It was therefore surprising when the first sequenced genome from the Enterocytozoonidae - a major family of human and animal-infecting microsporidians - appeared to have lost genes for glycolysis...
March 26, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28339881/genetic-aspects-and-environmental-sources-of-microsporidia-that-infect-the-human-gastrointestinal-tract
#9
Martin F Heyworth
Enterocytozoon bieneusi and Encephalitozoon intestinalis are microsporidia that infect the human gastrointestinal (GI) tract. Each of these microsporidia has been shown to infect various non-human hosts (mammalian and avian), raising the possibility of inter-species transmission, for example, from such hosts to human subjects via waterborne dispersal of microsporidian spores. During the past two decades, genome sequencing has delineated more than 90 genotypes of Ent. bieneusi, and has led to the conclusion that not all the genotypes of this organism infect human subjects...
February 27, 2017: Transactions of the Royal Society of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28338834/comparative-genomics-of-microsporidian-genomes-reveals-a-minimal-non-coding-rna-set-and-new-insights-for-transcription-in-minimal-eukaryotic-genomes
#10
Abdel Belkorchia, Jean-François Pombert, Valérie Polonais, Nicolas Parisot, Frédéric Delbac, Jean-François Brugère, Pierre Peyret, Christine Gaspin, Eric Peyretaillade
Microsporidia are ubiquitous intracellular pathogens whose opportunistic nature led to their increased recognition with the rise of the AIDS pandemic. As the RNA world was largely unexplored in this parasitic lineage, we developed a dedicated in silico methodology to carry out exhaustive identification of ncRNAs across the Encephalitozoon and Nosema genera. Thus, the previously missing U1 small nuclear RNA (snRNA) and small nucleolar RNAs (snoRNAs) targeting only the LSU rRNA were highlighted and were further validated using 5' and 3'RACE-PCR experiments...
February 28, 2017: DNA Research: An International Journal for Rapid Publication of Reports on Genes and Genomes
https://www.readbyqxmd.com/read/28331963/study-of-loma-acerinae-microsporidia-detected-from-three-ponto-caspian-gobies-gobiidae-in-ukraine
#11
Mykola Ovcharenko, Piotr Wróblewski, Yuriy Kvach, Oleksandra Drobiniak
A previously recognized Glugea-belonging Microsporidia (G. melanostomi, G. markievichi, G. naidenovi) were found in the intestinal mucosa of Neogobius melanostomus, N. fluviatilis, and Proterorhinchus semilunaris (Teleostei, Gobiidae) from lower Dnieper River and Black Sea coastal inlets, Ukraine. Light microscope observations demonstrated small spherical xenomes about 0.35 mm in diameter filled by developmental stages of parasites. Mature spores were ellipsoidal, slightly narrowed at anterior pole, sometimes ovoid or elongate in shape approximately 3...
March 23, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28321967/comparative-analysis-of-the-proteins-with-tandem-repeats-from-8-microsporidia-and-characterization-of-a-novel-endospore-wall-protein-colocalizing-with-polar-tube-from-nosema-bombycis
#12
Ying Wang, Huixia Geng, Xiaoqun Dang, Heng Xiang, Tian Li, Guoqing Pan, Zeyang Zhou
As a common feature of eukaryotic proteins, tandem amino acid repeat has been studied extensively in both animal and plant proteins. Here, a comparative analysis focusing on the proteins having tandem repeats was conducted in 8 microsporidia, including four mammal-infecting microsporidia (Encephalitozoon cuniculi, Encephalitozoon intestinalis, Encephalitozoon hellem and Encephalitozoon bieneusi) and four insect-infecting microsporidia (Nosema apis, Nosema ceranae, Vavraia culicis and Nosema bombycis). We found that the proteins with tandem repeats were abundant in these species...
March 21, 2017: Journal of Eukaryotic Microbiology
https://www.readbyqxmd.com/read/28277606/a-novel-spore-wall-protein-from-antonospora-locustae-microsporidia-nosematidae-contributes-to-sporulation
#13
Longxin Chen, Runting Li, Yinwei You, Kun Zhang, Long Zhang
Microsporidia are obligate intracellular parasites, existing in a wide variety of animal hosts. Here, we reported AlocSWP2, a novel protein identified from the spore wall of Antonospora locustae (formerly, Nosema locustae, and synonym, Paranosema locustae), containing four cysteines that are conserved among the homologues of several Microspodian pathogens in insects and mammals. AlocSWP2 was detected in the wall of mature spores via indirect immunofluorescence assay. In addition, immunocytochemistry localization experiments showed that the protein was observed in the wall of sporoblasts, sporonts, and meronts during sporulation within the host body, also in the wall of mature spores...
March 9, 2017: Journal of Eukaryotic Microbiology
https://www.readbyqxmd.com/read/28255818/screening-of-protozoan-and-microsporidian-parasites-in-feces-of-great-cormorant-phalacrocorax-carbo
#14
Piotr Rzymski, Anna Słodkowicz-Kowalska, Piotr Klimaszyk, Piotr Solarczyk, Barbara Poniedziałek
The global population of great cormorants (Phalacrocorax carbo L.) is on the rise. These birds, characterized by rapid metabolism, can deposit large quantities of feces, and because they breed on the land but forage on water, both terrestrial and aquatic environments can be simultaneously affected by their activities. The contribution of great cormorants in the dispersal of bacterial and viral pathogens has been immensely studied; whereas, the occurrence of eukaryotic parasites such as protozoans and microsporidians in these birds is little known...
March 2, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28249569/unity-in-defence-honeybee-workers-exhibit-conserved-molecular-responses-to-diverse-pathogens
#15
Vincent Doublet, Yvonne Poeschl, Andreas Gogol-Döring, Cédric Alaux, Desiderato Annoscia, Christian Aurori, Seth M Barribeau, Oscar C Bedoya-Reina, Mark J F Brown, James C Bull, Michelle L Flenniken, David A Galbraith, Elke Genersch, Sebastian Gisder, Ivo Grosse, Holly L Holt, Dan Hultmark, H Michael G Lattorff, Yves Le Conte, Fabio Manfredini, Dino P McMahon, Robin F A Moritz, Francesco Nazzi, Elina L Niño, Katja Nowick, Ronald P van Rij, Robert J Paxton, Christina M Grozinger
BACKGROUND: Organisms typically face infection by diverse pathogens, and hosts are thought to have developed specific responses to each type of pathogen they encounter. The advent of transcriptomics now makes it possible to test this hypothesis and compare host gene expression responses to multiple pathogens at a genome-wide scale. Here, we performed a meta-analysis of multiple published and new transcriptomes using a newly developed bioinformatics approach that filters genes based on their expression profile across datasets...
March 2, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28230483/studying-microparasites-of-the-phyla-myxozoa-and-microsporidia-infecting-fish-the-ultrastructural-contribution
#16
Sónia Rocha, Graça Casal, Carlos Azevedo
No abstract text is available yet for this article.
January 2017: Ultrastructural Pathology
https://www.readbyqxmd.com/read/28228409/clinical-and-demographic-study-of-microsporidial-keratoconjunctivitis-in-south-india-a-3-year-study-2013-2015
#17
Rohan Agashe, Naveen Radhakrishnan, Sayali Pradhan, Muthiah Srinivasan, Venkatesh N Prajna, Prajna Lalitha
AIM: To study the demographic profile, clinical features, treatment outcome and ocular morbidity of smear-positive microsporidial keratoconjunctivitis. METHODS: Retrospective case series of all patients with clinical features of microsporidial keratoconjunctivitis and who were smear positive for the same on Gram stain from January 2013 to December 2015. Demographic data, predisposing factors, microbiological investigations, clinical course and visual outcome were analysed...
February 22, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28219500/microsporidia-sequestered-in-corneal-stroma-for-years
#18
Joveeta Joseph, Somasheila Murthy, Savitri Sharma
No abstract text is available yet for this article.
March 2017: Ophthalmology
https://www.readbyqxmd.com/read/28205456/histochemical-study-of-encephalitozoon-cuniculi-spores-in-the-kidneys-of-naturally-infected-new-zealand-rabbits
#19
Luis E Rodríguez-Tovar, Alejandra Villarreal-Marroquín, Alicia M Nevárez-Garza, Uziel Castillo-Velázquez, Heidi G Rodríguez-Ramírez, Magda C Navarro-Soto, Juan J Zárate-Ramos, Gustavo Hernández-Vidal, Armando Trejo-Chávez
Encephalitozoon cuniculi is an important microsporidian pathogen that is considered an emergent, zoonotic, and opportunistic. It infects both domestic and laboratory rabbits, generating severe chronic interstitial and granulomatous nephritis with fibrosis and granulomatous encephalitis. Encephalitozoonosis is diagnosed in paraffin-embedded sections by examining the spores in the host tissues. The spores are difficult to observe when the samples are stained with hematoxylin and eosin (H&E), particularly when there is an inflammatory reaction and tissue damage...
February 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28199765/survey-for-zoonotic-microsporidian-pathogens-in-wild-living-urban-rooks-corvus-frugilegus
#20
Agnieszka Perec-Matysiak, Maria Wesołowska, Kinga Leśniańska, Katarzyna Buńkowska-Gawlik, Joanna Hildebrand, Marta Kicia
Microsporidia are opportunistic pathogens in nature infecting all animal phyla. There is a potential risk of microsporidian spores transmission from urban rooks inhabiting some metropolitan cities to people through casual interactions. The aim of this study was to identify microsporidia species in the droppings of rooks in Wroclaw, Poland. A total of 15 collective sets of droppings were examined using nested-PCR method. Amplification of ITS rRNA gene revealed the presence of Enterocytozoon bieneusi D, Peru 6 and Encephalitozoon hellem 1A genotypes...
February 15, 2017: Journal of Eukaryotic Microbiology
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