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The Global Challenge Posed by the Multiresistant International Clones of Bacterial Pathogens

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Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889452170 Year: Pages: 291 DOI: 10.3389/978-2-88945-217-0 Language: English
Publisher: Frontiers Media SA
Subject: Microbiology --- Science (General)
Added to DOAB on : 2017-10-13 14:57:01
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Multiresistant bacterial pathogens pose a serious problem worldwide making the appropriate treatment of patients with healthcare-associated infections a challenge. The spread of antibiotic resistance is either mediated by mobile genetic elements (MGEs) or the dissemination of genetically-related groups of pathogens, “high-risk clonal complexes”. Interestingly most multiresistant healthcare-associated bacteria command just a few dominant international clonal complexes causing infections in various geographical areas. It is of utmost importance to identify the determinants associated with and promoting the spread of antibiotic resistance and the dissemination of these multiresistant pathogens. The Topic comprises mostly of population and epidemiological studies investigating antibiotic resistance mechanisms, MGEs and the impact of antibiotic resistance, and the production of virulence factors on the clonal dynamics of a diverse range of bacterial species. Though, the exploration of the mechanisms governing clonal dynamics and the dissemination of antibiotic resistance will remain a salient issue for a considerable time to come we believe that the papers published in the Topic have usefully contributed to the better understanding of some of the processes involved and supplement papers investigating the “non-bacterial” constituents of clonal mobility, like proper medical practice and compliance with hygienic standards.

Ecology, Virulence and Detection of Pathogenic and Pandemic Vibrio Parahaemolyticus

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Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889199129 Year: Pages: 132 DOI: 10.3389/978-2-88919-912-9 Language: English
Publisher: Frontiers Media SA
Subject: Science (General) --- Microbiology
Added to DOAB on : 2016-01-19 14:05:46
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Vibrio parahaemolyticus is a gram negative, halophilic bacterium that occurs in the coastal and estuarine environments worldwide and is implicated in several cases of seafood-born gastroenteritis around the globe. However, not all strains of V. parahaemolyticus are pathogenic. Clinical isolates of V. parahaemolyticus most often produce either the thermostable direct haemolysin (TDH) or TDH-related haemolysin (TRH) encoded by tdh and trh genes, respectively. A pandemic clone of O3:K6 which was first detected in Kolkata (India), has been responsible for many outbreaks in Asia and the USA. With the emergence of pandemic clone of V. parahaemolyticus, this organism has assumed significance. Although most of the V. parahaemolyticus outbreaks are invariably related to seafood consumption, pathogenic strains are rarely isolated from seafood. Virulent strains producing TDH or TRH and the pandemic clone, which is responsible for most of the outbreaks (that have occurred after 1996) have been rarely isolated from seafood and other environmental samples. This could be due to the occurrence of pathogenic strains in the estuarine environment at a lower level compared to non-pathogenic strains. Another reason can be that the pathogenic stains are more sensitive to dystropic conditions in the aquatic environment and rapidly become non-culturable. Similarity in growth kinetics between virulent and non-virulent strains also made the isolation of virulent strains from the aquatic environment difficult. Several studies were done to determine the factors responsible for an increased virulence and persistance of pandemic clone. However, none of those studies were conclusive. Several researchers have proposed various genetic markers for specific detection of pandemic clone of V. parahaemolyticus. But many of those genetic markers were found to be unreliable. Recently, seven genomic islands (VPaI-1 to VPaI-7) unique to pandemic clone were identified. This Research Topic is dedicated to improve our current understanding of ecology, pathogenesis and detection of pathogenic and pandemic clone of V. parahaemolyticus, and will also strive to identify areas of future development.

New Advances on Zika Virus Research

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ISBN: 9783038977643 Year: Pages: 552 DOI: 10.3390/books978-3-03897-765-0 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Internal medicine --- Medicine (General)
Added to DOAB on : 2019-04-05 10:34:31
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Zika virus (ZIKV) is a mosquito-borne member of the Flaviviridae family that historically has been associated with mild febrile illness. However, the recent outbreaks in Brazil in 2015 and its rapid spread throughout South and Central America and the Caribbean, together with its association with severe neurological disorders—including fetal microcephaly and Guillain-Barré syndrome in adults—have changed the historic perspective of ZIKV. Currently, ZIKV is considered an important public health concern that has the potential to affect millions of people worldwide. The significance of ZIKV in human health and the lack of approved vaccines and/or antiviral drugs to combat ZIKV infection have triggered a global effort to develop effective countermeasures to prevent and/or treat ZIKV infection. In this Special Issue of Viruses, we have assembled a collection of 32 research and review articles that cover the more recent advances on ZIKV molecular biology, replication and transmission, virus–host interactions, pathogenesis, epidemiology, vaccine development, antivirals, and viral diagnosis.

Keywords

Ziks virus --- silvestrol --- antiviral --- eIF4A --- hepatocytes --- flavivirus --- arbovirus --- Zika --- sexual transmission --- testis --- prostate --- Zika virus --- ZIKV --- rhesus macaques --- Non-human primates --- NHP --- infection --- natural history --- Asian-lineage --- African-lineage --- zika virus --- ZIKV–host interactions --- viral pathogenesis --- cell surface receptors --- antiviral responses --- viral counteraction --- cytopathic effects --- microcephaly --- ZIKV-associated neurologic disorders --- Zika virus --- serology --- flavivirus --- microsphere immunoassay --- validated --- optimised --- dengue virus --- ZIKV --- reporter virus --- cryptic promoter silencing --- full-length molecular clone --- subgenomic replicon --- plasmid toxicity --- Zika virus --- dengue viruses --- flavivirus --- ELISA --- indirect immunofluorescence --- plaque reduction neutralization test --- polymerase chain reaction --- cross-reactions --- Zika virus --- flavivirus --- infectious cDNA --- replication --- gene expression --- neuropathogenesis --- viral genetic variation --- host genetic variation --- flavivirus --- Zika virus --- therapy --- host-directed antivirals --- Aedes aegypti --- RNA-seq --- insecticide resistance --- Zika virus --- detoxification and immune system responses --- Zika virus --- mosquito-borne flavivirus --- emerging arbovirus --- outbreak control --- molecular diagnostics --- laboratory preparedness --- assay standardization --- external quality assessment --- EQA --- QCMD --- flavivirus --- eye --- zika virus --- blood-retinal barrier --- ocular --- innate response --- Zika virus --- pregnancy --- fetal infection --- congenital Zika syndrome --- Asian lineage --- Zika virus --- Full-length cDNA infectious clones --- Bacterial artificial chromosome --- NS2A protein --- Zika virus --- neural progenitor cells --- neurons --- Zika virus --- antivirals --- therapeutics --- research models and tools --- flavivirus --- Zika virus (ZIKV) --- reverse genetics --- infectious clone --- full-length molecular clone --- bacterial artificial chromosome --- replicon --- infectious RNA --- Zika virus --- flavivirus --- arbovirus --- sexual transmission --- host genetic variation --- immune response --- Zika virus --- flaviviruses --- vaccines --- virus like particles --- clinical trials --- ZIKV --- NS1 protein --- Zika virus --- diagnosis --- monoclonal antibodies --- ELISA --- zika virus --- placenta cells --- microglia cells --- siRNA --- TLR7/8 --- Zika --- viral evolution --- genetic variability --- Bayesian analyses --- Zika virus --- reverse genetics --- infectious cDNA --- Tet-inducible --- MR766 --- FSS13025 --- flavivirus --- ZIKV --- NS5 --- type I IFN antagonist --- point-of-care diagnostics --- isothermal nucleic acid amplification --- nucleic acid computation --- nucleic acid strand exchange --- zika virus --- mosquito --- mosquito surveillance --- multiplex nucleic acid detection --- boolean logic-processing nucleic acid probes --- Zika virus --- flavivirus --- astrocytomas --- dsRNA --- viral fitness --- antiviral --- heme-oxygenase 1 --- Zika virus --- viral replication --- Zika virus --- antiviral compounds --- neural cells --- viral replication --- flavivirus --- Zika virus --- viral persistence --- testicular cells --- testes --- Zika virus --- prM-E proteins --- viral pathogenicity --- virus attachment --- viral replication --- viral permissiveness --- viral survival --- apoptosis --- cytopathic effects --- mutagenesis --- chimeric viruses --- human brain glial cells --- Zika virus --- flavivirus --- microRNAs --- neurons --- neuroinflammation --- anti-viral immunity --- Zika virus --- dengue virus --- secondary infections --- cross-reactions --- IgA --- IgG avidity tests

Plant Genetics and Molecular Breeding

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ISBN: 9783039211753 / 9783039211760 Year: Pages: 628 DOI: 10.3390/books978-3-03921-176-0 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology
Added to DOAB on : 2019-08-28 11:21:27
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Abstract

The development of new plant varieties is a long and tedious process involving the generation of large seedling populations for the selection of the best individuals. While the ability of breeders to generate large populations is almost unlimited, the selection of these seedlings is the main factor limiting the generation of new cultivars. Molecular studies for the development of marker-assisted selection (MAS) strategies are particularly useful when the evaluation of the character is expensive, time-consuming, or with long juvenile periods. The papers published in the Special Issue “Plant Genetics and Molecular Breeding” report highly novel results and testable new models for the integrative analysis of genetic (phenotyping and transmission of agronomic characters), physiology (flowering, ripening, organ development), genomic (DNA regions responsible for the different agronomic characters), transcriptomic (gene expression analysis of the characters), proteomic (proteins and enzymes involved in the expression of the characters), metabolomic (secondary metabolites), and epigenetic (DNA methylation and histone modifications) approaches for the development of new MAS strategies. These molecular approaches together with an increasingly accurate phenotyping will facilitate the breeding of new climate-resilient varieties resistant to abiotic and biotic stress, with suitable productivity and quality, to extend the adaptation and viability of the current varieties.

Keywords

sugarcane --- cry2A gene --- particle bombardment --- stem borer --- resistance --- NPK fertilizers --- agronomic traits --- molecular markers --- quantitative trait loci --- common wild rice --- Promoter --- Green tissue-specific expression --- light-induced --- transgenic chrysanthemum --- WRKY transcription factor --- salt stress --- gene expression --- DgWRKY2 --- Cucumis sativus L. --- RNA-Seq --- DEGs --- sucrose --- ABA --- drought stress --- Aechmea fasciata --- squamosa promoter binding protein-like --- flowering time --- plant architecture --- bromeliad --- Oryza sativa --- endosperm development --- rice quality --- WB1 --- the modified MutMap method --- abiotic stress --- Cicer arietinum --- candidate genes --- genetics --- heat-stress --- molecular breeding --- metallothionein --- Brassica --- Brassica napus --- As3+ stress --- broccoli --- cytoplasmic male sterile --- bud abortion --- gene expression --- transcriptome --- RNA-Seq --- sesame --- genome-wide association study --- yield --- QTL --- candidate gene --- cabbage --- yellow-green-leaf mutant --- recombination-suppressed region --- bulk segregant RNA-seq --- differentially expressed genes --- marker–trait association --- haplotype block --- genes --- root traits --- D-genome --- genotyping-by-sequencing --- single nucleotide polymorphism --- durum wheat --- bread wheat --- complex traits --- Brassica oleracea --- Ogura-CMS --- iTRAQ --- transcriptome --- pollen development --- rice --- OsCDPK1 --- seed development, starch biosynthesis --- endosperm appearance --- Chimonanthus praecox --- nectary --- floral scent --- gene expression --- Prunus --- flowering --- bisulfite sequencing --- genomics --- epigenetics --- breeding --- AP2/ERF genes --- Bryum argenteum --- transcriptome --- gene expression --- stress tolerance --- SmJMT --- transgenic --- Salvia miltiorrhiza --- overexpression --- transcriptome --- phenolic acids --- Idesia polycarpa var --- glycine --- FAD2 --- linoleic acid --- oleic acid --- anther wall --- tapetum --- pollen accumulation --- OsGPAT3 --- rice --- cytoplasmic male sterility (CMS) --- phytohormones --- differentially expressed genes --- pollen development --- Brassica napus --- Rosa rugosa --- RrGT2 gene --- Clone --- VIGS --- Overexpression --- Tobacco --- Flower color --- Anthocyanin --- sugarcane --- WRKY --- subcellular localization --- gene expression pattern --- protein-protein interaction --- transient overexpression --- soybean --- branching --- genome-wide association study (GWAS) --- near-isogenic line (NIL) --- BRANCHED1 (BRC1) --- TCP transcription factor --- Zea mays L. --- MADS transcription factor --- ZmES22 --- starch --- flowering time --- gene-by-gene interaction --- Hd1 --- Ghd7 --- rice --- yield trait --- Oryza sativa L. --- leaf shape --- yield trait --- molecular breeding --- hybrid rice --- nutrient use efficiency --- quantitative trait loci (QTLs), molecular markers --- agronomic efficiency --- partial factor productivity --- P. suffruticosa --- R2R3-MYB --- overexpression --- anthocyanin --- transcriptional regulation --- ethylene-responsive factor --- Actinidia deliciosa --- AdRAP2.3 --- gene expression --- waterlogging stress --- regulation --- Chrysanthemum morifolium --- WUS --- CYC2 --- gynomonoecy --- reproductive organ --- flower symmetry --- Hs1pro-1 --- cZR3 --- gene pyramiding --- Heterodera schachtii --- resistance --- tomato --- Elongated Internode (EI) --- QTL --- GA2ox7 --- n/a

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