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Vibrio parahaemolyticus

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https://www.readbyqxmd.com/read/28822933/occurrence-of-vibrio-species-beta-lactam-resistant-vibrio-species-and-indicator-bacteria-in-ballast-and-port-waters-of-a-tropical-harbor
#1
Charmaine Ng, Shin Giek Goh, Nazanin Saeidi, William A Gerhard, Claudia K Gunsch, Karina Yew Hoong Gin
Ballast water discharges are potential sources for the spread of invasive and pathogenic aquatic organisms. Ballast waters from six ships docked in the Port of Singapore were tested to determine if indictor organisms fell within proposed standards for ballast water discharge according to regulation D-2 of the Ballast Water Management Convention (BWMC) guidelines. Vibrio species were cultured on media supplemented with beta-lactam antibiotics to determine the presence of antibiotic resistant Vibrio species in the ballast waters of these vessels...
August 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28821419/characterization-expression-and-evolutionary-analysis-of-new-tlr3-and-tlr5m-genes-cloned-from-the-spiny-eel-mastacembelus-armatus
#2
Chong Han, Qiang Li, Zhipeng Zhang, Jianrong Huang
Toll-like receptors (TLRs) play an important role in innate and adaptive immunity. Here, we identify two new TLRs from the spiny eel Mastacembelus armatus (TLR3 and membrane TLR5M). Both MaTLR3 and MaTLR5M were expressed in all tested tissues; expression was highest in liver and spleen, respectively. After infection with Vibrio parahaemolyticus, expression of both TLRs fluctuated and differed significantly from controls at several time points. The predicted three-dimensional model of the MaTLR3 and MaTLR5M proteins indicates that most sites under positive selection were located in the extracellular domains of TLRs...
August 15, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28820009/expression-of-a-vibrio-parahaemolyticus-toxin-in-escherichia-coli-results-in-chromosomal-dna-degradation
#3
Jing Zhang, Saki Taniguchi, Hironori Ito, Kazuhiro Iiyama, Madoka Hino, Tsutomu Katayama, Makoto Kimura
A toxin-antitoxin system, vp1842/vp1843, locates within a superintegron on the Vibrio parahaemolyticus genome chromosome I whose toxin gene vp1843 encodes a DNA nicking endonuclease. We found that the vp1843 expression in Escherichia coli cells strongly induced chromosomal DNA degradation. On the basis of these observations, we discuss a possible physiological role of vp1842/vp1843 in V. parahaemolyticus.
August 18, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28794324/christmas-tree-derived-amplification-immuno-strategy-for-sensitive-visual-detection-of-vibrio-parahaemolyticus-based-on-gold-label-silver-stain-technology
#4
Xinxin Song, Yanjie Wu, Lin Wu, Yufang Hu, Wenrou Li, Zhiyong Guo, Xiurong Su, Xiaohua Jiang
A developed Christmas-tree derived immunosensor based on a gold label silver stain (GLSS) technique was fabricated for a highly sensitive analysis of Vibrio parahaemolyticu (VP). In this strategy, captured VP antibody (cAb) was immobilized on a solid substrate; then, the VPs were sequentially tagged with a signal probe by incubating the assay with a detection VP antibody (dAb) conjugated gold nanoparticles (AuNPs)-labeled graphite-like carbon nitride (g-C3N4). Finally, the attached signal probe could harvest a visible signal by the silver meal deposition, and then followed by homebrew Matlab 6...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28790994/insight-into-the-origin-and-evolution-of-the-vibrio-parahaemolyticus-pandemic-strain
#5
REVIEW
Romilio T Espejo, Katherine García, Nicolas Plaza
A strain of Vibrio parahaemolyticus that emerged in 1995 caused the first known pandemic involving this species. This strain comprises clonal autochthonous ocean-dwelling bacteria whose evolution has occurred in the ocean environment. The low sequence diversity in this population enabled the discovery of information on its origin and evolution that has been hidden in bacterial clones that have evolved over a long period. Multilocus sequencing and microarray analysis, together with phylogenetic analysis, of pandemic and pre-pandemic isolates has suggested that the founder clone was an O3:K6 non-pathogenic strain that initially acquired a toxRS/new region and subsequently acquired at least seven novel genomic islands...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28781188/distribution-and-antimicrobial-susceptibility-of-vibrio-species-associated-with-zooplankton-in-coastal-area-of-korea
#6
Ji Hye Yang, Jong Soo Mok, Yeoun Joong Jung, Ka Jeong Lee, Ji Young Kwon, Kunbawui Park, Seong Yong Moon, Soon Jae Kwon, A Ra Ryu, Tea Seek Lee
Vibrio parahaemolyticus and V. vulnificus are the most common pathogens causing seafood-borne illnesses in Korea. This study determines the abundance and antimicrobial resistance of pathogenic Vibrio species in seawater and zooplankton samples from the Geoje Island coast in Korea, which is an important area for coastal fisheries, the fishing industry, and tourism. The two Vibrio species were detected more in mesozooplankton samples than in seawater samples. V. parahaemolyticus isolates showed greater resistance than those of V...
August 4, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28779889/seasonal-influence-of-scallop-culture-on-nutrient-flux-bacterial-pathogens-and-bacterioplankton-diversity-across-estuaries-off-the-bohai-sea-coast-of-northern-china
#7
Yaodong He, Biswarup Sen, Junyang Shang, Yike He, Ningdong Xie, Yongfeng Zhang, Jianle Zhang, Zackary I Johnson, Guangyi Wang
In this study, we investigated the environmental impacts of scallop culture on two coastal estuaries adjacent the Bohai Sea including developing a quantitative PCR assay to assess the abundance of the bacterial pathogens Escherichia coli and Vibrio parahaemolyticus. Scallop culture resulted in a significant reduction of nitrogen, Chlorophyll a, and phosphorous levels in seawater during summer. The abundance of bacteria including V. parahaemolyticus varied significantly across estuaries and breeding seasons and was influenced by nitrate as well as nutrient ratios (Si/DIN, N/P)...
August 2, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28764985/function-of-two-ficolin-like-proteins-in-innate-immune-defense-of-the-oriental-river-prawn-macrobrachium-nipponense
#8
Tingting Li, Lei Wu, Min Jin, Futong Ma, Xin Huang, Qian Ren
Ficolins have crucial functions in recognizing and eliminating pathogens in innate immunity. In this study, we identified two ficolin-like genes from the oriental river prawn, Macrobrachium nipponense. These genes were designated as MnFico1 and MnFico2. MnFico1 cDNA has 1600 bp, whereas MnFico2 has 1486 bp. In addition to a coiled-coil region or a low complexity region, the two ficolins both contained a signal peptide and a fibrinogen-related domain. qRT-PCR results showed that the highest expression level of MnFico1 expression was in the gills, whereas that of MnFico2 was in the heart...
July 29, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28752295/nmr-based-metabolomics-reveals-the-metabolite-profiles-of-vibrio-parahaemolyticus-under-ferric-iron-stimulation
#9
Jun Zhou, Chenyang Lu, Dijun Zhang, Chennv Ma, Xiurong Su
Vibrio parahaemolyticus is a halophilic bacterium endemic to coastal areas, and its pathogenicity has caused widespread seafood poisoning. In our previous research, the protein expression of V. parahaemolyticus in Fe(3+) medium was determined using isobaric tags for relative and absolute quantitation (iTRAQ). Here, nuclear magnetic resonance (NMR) was used to detect changes in the V. parahaemolyticus metabolome. NMR spectra were obtained using methanol-water extracts of intracellular metabolites from V. parahaemolyticus under various culture conditions, and 62 metabolites were identified, including serine, arginine, alanine, ornithine, tryptophan, glutamine, malate, NAD(+), NADP(+), oxypurinol, xanthosine, dCTP, uracil, thymine, hypoxanthine, and betaine...
August 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28743625/a-single-wap-domain-containing-protein-from-litopenaeus-vannamei-possesses-antiproteinase-activity-against-subtilisin-and-antimicrobial-activity-against-ahpnd-inducing-vibrio-parahaemolyticus
#10
Suwattana Visetnan, Premruethai Supungul, Anchalee Tassanakajon, Suchao Donpudsa, Vichien Rimphanitchayakit
The single WAP domain-containing protein (SWD) is a type III crustin antimicrobial peptide whose function is to defense the host animal against the bacterial infection by means of antimicrobial and antiproteinase activities. A study of SWD from Litopenaeus vannamei (LvSWD) is reported herein about its activities and function against bacteria, particularly the AHPND-inducing Vibrio parahaemolyticus (VPAHPND) that causes acute hepatopancreatic necrosis disease (AHPND). The LvSWD is mainly synthesized in hemocytes and up-regulated in response to VPAHPND infection...
July 22, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28734968/identification-of-an-mitf-gene-and-its-polymorphisms-associated-with-the-vibrio-resistance-trait-in-the-clam-meretrix-petechialis
#11
Shujing Zhang, Xin Yue, Fengjuan Jiang, Hongxia Wang, Baozhong Liu
Microphthalmia-associated transcription factor (MITF) regulates the transcription of its target genes by binding to their promoters. In this study, an MITF gene, MpMITF was identified in the clam Meretrix petechialis. The full-length cDNA of MpMITF is 3564 bp with an ORF of 1365 bp. The deduced amino acid sequence consists of a conserved functional structure of bHLH-LZ, which could bind with E-box. The mRNA and protein expression levels of MpMITF were significantly up-regulated 6 h post-Vibrio injection. The mRNA expression of MpMITF increased on day 2 and peaked on day 10 post-Vibrio immersion...
July 19, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28733150/seven-new-lignan-glycosides-from-the-branches-of-alangium-kurzii-craib-var-laxifolium
#12
Jie Ren, Yang-Guo Xie, Ying-Ying Huang, Sheng-Lan Zhu, Shi-Kai Yan, Hui-Zi Jin, Wei-Dong Zhang
Seven new lignan glycosides (1-3, 8-10, and 14) and 17 known compounds were isolated from the branches of Alangium kurzii Craib var. laxifolium. Their structures were established by spectroscopic analysis and circular dichroism (CD) and X-ray analysis. The isolated compounds were evaluated for their antibacterial activities against Staphylococcus aureus CI1011, Streptococcus suis CI1608, Salmonella gallinarum CI0912, Enterococcus faecalis CI1304, Aeromonas hydrophila CI1008, Escherichia coli CI151012, Vibrio parahaemolyticus CI150506, Klebsiella pneumoniae CI131216, Pseudomonas aeruginosa CI1011, Staphylococcus epidermidis CI1110, and Streptococcus agalactiae CI1302...
July 19, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28732733/antibacterial-activities-and-preservative-effect-of-chitosan-oligosaccharide-maillard-reaction-products-on-penaeus-vannamei
#13
Tao Sun, Yingying Qin, Honglei Xu, Jing Xie, Dongmei Hu, Bin Xue, Xinyi Hua
The purpose of this study was to understand the influence of Maillard reaction (MR) on bioactivity of chitosan oligosaccharide (COS). The antibacterial activity against Pseudomonas aeruginosa and Vibrio parahaemolyticus and preservative effect of two kinds of COS MR products (MRPs) on Penaeus vannamei were evaluated. The structures of CG (MRPs of COS and glucose) and CM (MRPs of COS and maltose) were characterized by FT-IR and their molecular weights were measured by gel permeation chromatography (GPC). The results showed that CG has enhanced antibacterial activity and preservative effect compared to COS by evaluating total volatile base-nitrogen (TVB-N), trimethylamine (TMA), pH, total bacterial count (TBC) and sensory evaluation...
July 18, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28717834/characterizing-the-adherence-profiles-of-virulent-vibrio-parahaemolyticus-isolates
#14
Alisha M Aagesen, Sureerat Phuvasate, Yi-Cheng Su, Claudia C Häse
The human pathogen Vibrio parahaemolyticus is a leading cause of seafood-borne illness in the USA, and infections with V. parahaemolyticus typically result from eating raw or undercooked oysters. V. parahaemolyticus has been shown to be highly resistant to oyster depuration, suggesting that the bacterium possesses specific mechanisms or factors for colonizing oysters and persisting during depuration. In this study, we characterized eight different V. parahaemolyticus strains for differences in resistance to oyster depuration, biofilm formation, and motility...
July 17, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28710011/antibacterial-activity-of-food-grade-chitosan-against-vibrio-parahaemolyticus-biofilms
#15
Ting Xie, Zhenlin Liao, Huan Lei, Xiang Fang, Jie Wang, Qingping Zhong
Biofilm is a community composed of microbes and the extracellular polymeric substances. This special architecture poses a significant public health risk as it increases the fitness of bacteria in harsh conditions and renders bacterial resistance to antimicrobial agents and cleaning. In this study, we investigated the inhibition and eradication effects of chitosan on the biofilm of Vibrio parahaemolyticus, an important food-borne pathogen. The crystal violet staining, [2, 3-bis (2-methoxy-4-nitro-5- sulfophenyl)-2H-tetrazolium-5-carboxanilide] (XTT) reduction method, phenol-sulfuric acid method, fluorescence microscope and confocal laser scanning microscope (CLSM) observation were conducted...
July 11, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28709108/vibrio-parahaemolyticus-and-v-alginolyticus-associated-meningo-encephalitis-in-a-bottlenose-dolphin-tursiops-truncatus-from-the-adriatic-coast-of-italy
#16
Ludovica Di Renzo, Gabriella Di Francesco, Chiara Profico, Cristina E Di Francesco, Nicola Ferri, Daniela Averaimo, Giovanni Di Guardo
A case of Vibrio parahaemolyticus- and V. alginolyticus-associated meningo-encephalitis in a bottlenose dolphin (Tursiops truncatus) found stranded along the Adriatic coast of Italy in 2016 is herein reported, along with a minireview on V. parahaemolyticus and V. alginolyticus infections in aquatic mammals. Macroscopically, two abscesses were found in the dolphin's forebrain, along with an extensive, bilateral, parasitic broncho-pneumonia. Histologically, a suppurative-to-pyogranulomatous meningo-encephalitis involved the brain but not the cerebellum...
July 1, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28704687/antimicrobial-polyketide-furanoterpenoids-from-seaweed-associated-heterotrophic-bacterium-bacillus-subtilis-mtcc-10403
#17
Kajal Chakraborty, Bini Thilakan, Vamshi Krishna Raola
Brown seaweed Anthophycus longifolius (Turner) Kützing (family Sargassaceae) associated heterotrophic bacterium Bacillus subtilis MTCC 10403 was found to be a potent isolate with broad range of antibacterial activity against important perceptive food pathogens Vibrio parahaemolyticus, V. vulnificus, and Aeromonas hydrophila. This bacterium was positive for polyketide synthetase gene (KC589397), and therefore, was selected to bioprospect specialized metabolites bearing polyketide backbone. Bioactivity-guided chromatographic fractionation of the ethyl acetate extract of the seaweed-associated bacterium segregated four homologous polyketide furanoterpenoids with potential antibacterial activities against clinically important pathogens...
July 10, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28702797/purification-and-antibacterial-mechanism-of-fish-borne-bacteriocin-and-its-application-in-shrimp-penaeus-vannamei-for-inhibiting-vibrio-parahaemolyticus
#18
Xinran Lv, Jingfang Du, Yu Jie, Bolin Zhang, Fengling Bai, Hongfei Zhao, Jianrong Li
Vibrio parahaemolyticus: is recognized as the main cause of gastroenteritis associated with consumption of seafood. Bacteriocin-producing Lactobacillus plantarum FGC-12 isolated from golden carp intestine had strong antibacterial activity toward V. parahaemolyticus. The fish-borne bacteriocin was purified by a three-step procedure consisting of ethyl acetate extraction, gel filtration chromatography and high performance liquid chromatography. Its molecular weight was estimated at 4.1 kDa using SDS-PAGE. The fish-borne bacteriocin reached the maximum production at stationary phase after 20 h...
August 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28698913/antibacterial-and-antioxidant-constituents-of-extracts-of-endophytic-fungi-isolated-from-ocimum-basilicum-var-thyrsiflora-leaves
#19
Piyamas Atiphasaworn, Sakon Monggoot, Eleni Gentekaki, Siraprapa Brooks, Patcharee Pripdeevech
Fourteen fungal endophytes were isolated from the Ocimum basilicum var. thyrsiflora leaves collected from Northern Thailand. Eight genera were identified including Aspergillus, Ascochyta, Nigrospora, Blastomyces, Colletotrichum, Exidia, Clitopilus, and Nomuraea. The antibacterial activity of crude extracts from all endophytic fungi was tested against nine human bacterial pathogens: Staphylococcus aureus, Staphylococcus epidermidis, Bacillus subtilis, Bacillus cereus, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Vibrio cholerae, and Vibrio parahaemolyticus...
July 12, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28698126/molecular-characterization-and-expression-analyses-of-toll-like-receptor-5-induced-by-vibrio-parahaemolyticus-antigens-in-pacific-red-snapper
#20
Martha Reyes-Becerril, Erika Alamillo, Sergio Rosales-Mendoza, Felipe Ascencio, M Angeles Esteban, Carlos Angulo
Toll-like receptor 5 (TLR5) is a member of TLRs family responsible for the bacterial flagellin recognition in vertebrates. Herein, the TLR5M gene structure of Pacific red snapper (Lutjanus peru) was characterized. The full-length cDNA of LpTLR5M comprises an open reading frame (ORF) of 2715 bp, encoding a polypeptide of 904 amino acids including 9 LRRs (residues 119-562) and one LRR-CT domain (residues 593-646) at the extracellular region, and a TIR domain (residues 710-904) in the cytoplasmic region. The amino acid sequence in L...
July 8, 2017: Fish & Shellfish Immunology
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