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https://www.readbyqxmd.com/read/27921342/cross-protection-against-vibrio-cholerae-infection-by-monoclonal-antibodies-against-vibrio-vulnificus-rtxa1-martxvv
#1
Tae Hee Lee, Sun-Shin Cha, Chang-Seop Lee, Joon Haeng Rhee, Hye Ryun Woo, Kyung Min Chung
Gram-negative Vibrio species secrete multifunctional autoprocessing repeats-in-toxin (MARTX) toxins associated with bacterial pathogenesis. Here, the cross-reactivity and cross-protectivity of mAbs against V. vulnificus RtxA1/MARTXVv was evaluated. Passive administration of any of these mAbs (21RA, 24RA, 46RA, 47RA and 50RA) provided strong protection against lethal V. cholerae infection. Interestingly, 24RA and 46RA, which map to the cysteine protease domain of V. cholerae MARTXVc , inhibited CPD autocleavage in vitro; this process is involved in V...
November 2016: Microbiology and Immunology
https://www.readbyqxmd.com/read/27915250/importance-of-fumarate-and-nitrate-reduction-regulatory-protein-for-proliferation-for-intestinal-proliferation-of-vibrio-vulnificus
#2
Takehiro Kado, Takashige Kashimoto, Kohei Yamazaki, Shunji Ueno
The sepsis caused by Vibrio vulnificus is characterized by an average incubation period of 26 hours and a high mortality rate exceeding 50%. The fast growth and dissemination of V. vulnificus in vivo lead to poor clinical outcomes in patients. Therefore, elucidation of the proliferation mechanisms of this organism in vivo may lead to development of an effective therapeutic strategy. In this study, we focused on the low oxygen concentration in the intestinal milieu because of its drastic difference from that in the air...
December 2, 2016: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/27895624/visualizing-evolutionary-relationships-of-multidomain-proteins-an-example-from-receiver-rec-domains-of-sensor-histidine-kinases-in-the-candidatus-maribeggiatoa-str-orange-guaymas-draft-genome
#3
Barbara J MacGregor
For multidomain proteins, evolutionary changes may occur at the domain as well as the whole-protein level. An example is presented here, with suggestions for how such complicated relationships might be visualized. Earlier analysis of the Candidatus Maribeggiatoa str. Orange Guaymas (BOGUAY; Gammaproteobacteria) single-filament draft genome found evidence of gene exchange with the phylogenetically distant Cyanobacteria, particularly for sensory and signal transduction proteins. Because these are modular proteins, known to undergo frequent duplication, domain swapping, and horizontal gene transfer, a single domain was chosen for analysis...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27871750/biogeochemical-and-hydrological-drivers-of-the-dynamics-of-vibrio-species-in-two-patagonian-estuaries
#4
Germán A Kopprio, M Eugenia Streitenberger, Kentaro Okuno, Mónica Baldini, Florencia Biancalana, Anna Fricke, Ana Martínez, Sucharit B Neogi, Boris P Koch, Shinji Yamasaki, Rubén J Lara
The ecology of the most relevant Vibrio species for human health and their relation to water quality and biogeochemistry were studied in two estuaries in Argentinian Patagonia. Vibrio cholerae and Vibrio parahaemolyticus were reported in >29% of cases at the Río Colorado and Río Negro estuaries. Neither the pandemic serogroups of Vibrio cholerae O1, Vibrio cholerae O139 nor the cholera toxin gene were detected in this study. However, several strains of V. cholerae (not O1 or O139) are able to cause human disease or acquire pathogenic genes by horizontal transfer...
November 18, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27858184/pathogenic-mechanisms-of-actin-cross-linking-toxins-peeling-away-the-layers
#5
Elena Kudryashova, David B Heisler, Dmitri S Kudryashov
Actin cross-linking toxins are produced by Gram-negative bacteria from Vibrio and Aeromonas genera. The toxins were named actin cross-linking domains (ACD), since the first and most of the subsequently discovered ACDs were found as effector domains in larger MARTX and VgrG toxins. Among recognized human pathogens, ACD is produced by Vibrio cholerae, Vibrio vulnificus, and Aeromonas hydrophila. Upon delivery to the cytoplasm of a host cell, ACD covalently cross-links actin monomers into non-polymerizable actin oligomers of various lengths...
November 18, 2016: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/27851415/1780-a-fatal-case-of-vibrio-vulnificus-sepsis-with-hemorrhagic-bullae
#6
Marina Hitosugi-Levesque, Gehan Devendra
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27843109/non-cholera-vibrios-the-microbial-barometer-of-climate-change
#7
REVIEW
Craig Baker-Austin, Joaquin Trinanes, Narjol Gonzalez-Escalona, Jaime Martinez-Urtaza
There is a growing interest in the role of climate change in driving the spread of waterborne infectious diseases, such as those caused by bacterial pathogens. One particular group of pathogenic bacteria - vibrios - are a globally important cause of diseases in humans and aquatic animals. These Gram-negative bacteria, including the species Vibrio vulnificus, Vibrio parahaemolyticus and Vibrio cholerae, grow in warm, low-salinity waters, and their abundance in the natural environment mirrors ambient environmental temperatures...
November 11, 2016: Trends in Microbiology
https://www.readbyqxmd.com/read/27836844/season-specific-occurrence-of-potentially-pathogenic-vibrio-spp-on-the-southern-coast-of-south-korea
#8
Doris Y W Di, Anna Lee, Jeonghwan Jang, Dukki Han, Hor-Gil Hur
: Vibrio species are widely distributed in warm estuarine and coastal environments, and they can infect humans through the consumption of raw and mishandled contaminated seafood. In this study, we aimed to isolate and observe the distribution of enteropathogenic Vibrio spp. from environments of the southern coast of South Korea over a season cycle. A total of 10,983 Vibrio spp. were obtained from tidal water and mud samples over a one-year period from five sampling sites along the southern west coast of South Korea...
November 11, 2016: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27826246/preliminary-study-on-the-in-vitro-and-in-vivo-effects-of-asparagopsis-taxiformis-bioactive-phycoderivates-on-teleosts
#9
Fabio Marino, Gianfranco Di Caro, Concetta Gugliandolo, Antonio Spanò, Caterina Faggio, Giuseppa Genovese, Marina Morabito, Annamaria Russo, Davide Barreca, Francesco Fazio, Andrea Santulli
Several compounds from marine organisms have been studied for their potential use in aquaculture. Among the red algae, Asparagopsis taxiformis is considered one of the most promising species for the production of bioactive metabolites with numerous proposed applications. Here, the in vitro antibacterial activity, the easy handling and the absence of adverse effects on marine fish species are reported. Depending on the seasonal period of sampling, ethanol extracts of A. taxiformis exhibited significantly different inhibitory activity against fish pathogenic bacteria...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27800436/occurrence-of-vibrio-parahaemolyticus-vibrio-cholerae-and-vibrio-vulnificus-in-the-clam-ruditapes-philippinarum-adams-reeve-1850-from-emilia-romagna-and-sardinia-italy
#10
Pier Luca Passalacqua, Emanuele Zavatta, Giorgia Bignami, Andrea Serraino, Patrizia Serratore
Marine vibrios, Vibrio parahaemolyticus, V. vulnificus and V. cholerae are responsible of the majority of food-borne human infections by consumption of bivalve shellfish. The aim of the present study was to ascertain the occurrence of these bacteria, and their potential pathogenicity, in the Manila clam R. philippinarum from Emilia Romagna (ER) and Sardinia (SR) regions, Italy. Isolation was performed on CHROMagar(TM) vibrio with subculture on (thiosulfate-citrate-bile salts-sucrose) Agar and m-modified-cellobiose-polymyxin b-colistin (-CPC) Agar...
January 18, 2016: Italian Journal of Food Safety
https://www.readbyqxmd.com/read/27798649/vibrio-vulnificus-type-6-secretion-system-1-contains-anti-bacterial-properties
#11
Selina R Church, Thomas Lux, Craig Baker-Austin, Sam P Buddington, Stephen Ll Michell
Vibrio vulnificus is a bacterium responsible for severe gastroenteritis, sepsis and wound infections. Gastroenteritis and sepsis are commonly associated with the consumption of raw oysters, whereas wound infection is often associated with the handling of contaminated fish. Although classical virulence factors of this emerging pathogen are well characterised, there remains a paucity of knowledge regarding the general biology of this species. To investigate the presence of previously unreported virulence factors, we applied whole genome sequencing to a panel of ten V...
2016: PloS One
https://www.readbyqxmd.com/read/27793822/differences-in-total-vibrio-spp-v-vulnificus-and-v-parahaemolyticus-abundance-between-clams-and-oysters-in-north-carolina
#12
B A Froelich, B Phippen, P Fowler, R T Noble, J D Oliver
: Filter feeding shellfish can concentrate pathogenic bacteria, including Vibrio vulnificus and V. parahaemolyticus, as much as 1000 fold from the overlying water. These shellfish, especially clams and oysters, are often consumed raw, providing a route of entry for a concentrated dose of pathogenic bacteria into the human body. Food-borne infections from these microbes are on the rise, and a better understanding of the conditions that might trigger elevated seafood concentrations of these bacteria are needed...
October 28, 2016: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27750436/two-new-benzoate-derivatives-and-one-new-phenylacetate-derivative-from-a-marine-derived-fungus-engyodontium-album
#13
Weiyi Wang, Ruixuan Chen, Zhuhua Luo, Wei Wang, Jianming Chen
Two new benzoate derivatives, ethyl 3,5-dimethoxy-2-propionylbenzoate (1) and ethyl 3,5-dihydroxy-2-propionylbenzoate (2), and one new phenylacetate derivative, ethyl 3,5-dimethoxy-2-propionylphenylacetate (3), together with 9 known compounds, were isolated from the fermentation of Engyodontium album derived from deep sea sediment. Their structures were elucidated by spectroscopic techniques, such as NMR, IR and HRESIMS. Compound 3 exhibited inhibitory activities against methicillin-resistant Staphylococcus aureus ATCC 43300 (MRSA) and Vibrio vulnificus, with MIC values of 7...
October 18, 2016: Natural Product Research
https://www.readbyqxmd.com/read/27748924/a-silkworm-infection-model-to-investigate-vibrio-vulnificus-virulence-genes
#14
Mai Yamamoto, Takashige Kashimoto, Yukihiro Yoshimura, Nao Tachibana, Shiho Kuroda, Yoshiko Miki, Sou Kitabayashi, Ping Tong, Jianbo Xiao, Koichi Tanaka, Hiroshi Hamamoto, Kazuhisa Sekimizu, Koichiro Yamamoto
The halophilic marine bacterium, Vibrio vulnificus, occasionally causes fatal septicemia in immunocompromised patients. Mice are commonly used as experimental animals to investigate the virulence of V. vulnificus, however, a large number of mice are generally required for bioassays. The present study examined whether the invertebrate species, silkworms, can be used instead of mice to investigate V. vulnificus virulence. When the silkworms were inoculated with 1.2x107 colony forming units of V. vulnificus OPU1‑Rf, a virulent strain of V...
September 26, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27747902/raw-ready-to-eat-seafood-safety-microbiological-quality-of-the-various-seafood-species-available-at-fishery-hyper-and-online-market
#15
H W Kim, Y J Hong, J I Jo, S D Ha, S H Kim, H J Lee, M S Rhee
Microbiological quality of 206 raw ready-to-eat seafood samples were investigated according to species (gizzard shad, halibut, rockfish, tuna, oyster, and squid) and distribution channels (fishery, hyper, and online market). Enumeration of Aerobic Plate Count (APC) and total coliforms (TC) and pathogenic bacteria (Bacillus cereus, Staphylococcus aureus, and Vibrio parahaemolyticus) were performed, and level of microbiological quality were classified into four groups: satisfactory, acceptable, unsatisfactory, and unacceptable...
October 16, 2016: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/27709461/quantification-of-vibrio-species-in-oysters-from-the-gulf-of-mexico-with-two-procedures-based-on-mpn-and-pcr
#16
Guadalupe Barrera-Escorcia, Irma Wong-Chang, Carlos Leopoldo Fernández-Rendón, Alfonso Vázquez Botello, Bruno Gómez-Gil, Marcial Leonardo Lizárraga-Partida
Oysters can accumulate potentially pathogenic water bacteria. The objective of this study was to compare two procedures to quantify Vibrio species present in oysters to determine the most sensitive method. We analyzed oyster samples from the Gulf of Mexico, commercialized in Mexico City. The samples were inoculated in tubes with alkaline peptone water (APW), based on three tubes and four dilutions (10(-1) to 10(-4)). From these tubes, the first quantification of Vibrio species was performed (most probable number (MPN) from tubes) and bacteria were inoculated by streaking on thiosulfate-citrate-bile salts-sucrose (TCBS) petri dishes...
December 0: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27624095/o-heterocyclic-derivatives-with-antibacterial-properties-from-marine-bacterium-bacillus-subtilis-associated-with-seaweed-sargassum-myriocystum
#17
Kajal Chakraborty, Bini Thilakan, Rekha Devi Chakraborty, Vamshi Krishna Raola, Minju Joy
The brown seaweed, Sargassum myriocystum associated with heterotrophic bacterium, Bacillus subtilis MTCC 10407 (JF834075) exhibited broad-spectra of potent antibacterial activities against pathogenic bacteria Aeromonas hydrophila, Vibrio vulnificus, and Vibrio parahaemolyticus. B. subtilis MTCC 10407 was found to be positive for polyketide synthetase (pks) gene, and therefore, was considered to characterize secondary metabolites bearing polyketide backbone. Using bioassay-guided fractionation, two new antibacterial O-heterocyclic compounds belonging to pyranyl benzoate analogs of polyketide origin, with activity against pathogenic bacteria, have been isolated from the ethyl acetate extract of B...
September 13, 2016: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27617208/rapidly-developing-and-fatal-vibrio-vulnificus-wound-infection
#18
Craig Baker-Austin, James D Oliver
No abstract text is available yet for this article.
2016: IDCases
https://www.readbyqxmd.com/read/27582739/rt-pcr-dgge-analysis-to-elucidate-the-dominant-bacterial-species-of-industrial-spanish-style-green-table-olive-fermentations
#19
Antonio Benítez-Cabello, Joaquín Bautista-Gallego, Antonio Garrido-Fernández, Kalliopi Rantsiou, Luca Cocolin, Rufino Jiménez-Díaz, Francisco N Arroyo-López
This paper describes the dominant bacterial species metabolically active through the industrial production of Spanish-style Manzanilla and Gordal olives. For this purpose, samples (brines and fruits) obtained at 0, 15, and 90 fermentation days were analyzed by a culture-independent approach to determine viable cells by reverse transcription of RNA and further PCR-DGGE analysis, detecting at least 7 different species. Vibrio vulnificus, Lactobacillus plantarum group, and Lactobacillus parafarraginis were present in samples from both cultivars; Lactobacillus sanfranciscensis and Halolactobacillus halophilus were detected only in Gordal samples, while Staphylococcus sp...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27569982/a-c-type-lectin-that-inhibits-bacterial-infection-and-facilitates-viral-invasion-in-black-rockfish-sebastes-schlegelii
#20
Yong Liu, Ning-Qiu Li, Xin-Peng Zhao, Bin Yue, Shu-Wen He, Zhi-Xin Gao, Shun Zhou, Min Zhang
C-type lectins (CTLs) are important pattern recognition receptors (PRRs) that play vital roles in innate immunity. In teleosts, a number of CTLs have been reported, but their in vivo effects on host defense are still limited. In this study, a CTL homolog (SsLec1) was identified from black rockfish, Sebastes schlegelii, and its structure, expression and biological function was analyzed. The open reading frame of SsLec1 is 633 bp, with a 5'- untranslated region (UTR) of 36 bp and a 3'- UTR of 117 bp. The deduced amino acid sequence of SsLec1 shares the highest overall identity (73...
October 2016: Fish & Shellfish Immunology
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