Vibrio

Sun, 03/01/2020 - 03:35
Author(s): Shuwen Lei, Xiaokui Gu, Qingping Zhong, Linjie Duan, Aimei Zhou Vibrio parahaemolyticus, a marine food-borne pathogen, has been proved to be a significant cause of human gastrointestinal disorders worldwide. In this study, a method of multiplex droplet digital PCR (ddPCR) based on primer and probe sequences of the tlh, tdh and ureR genes were developed and evaluated for the reliable...
Wed, 02/26/2020 - 03:36
ABSTRACT The temporal switching of serotypes from serotype Ogawa to Inaba and back to Ogawa was identified in Vibrio cholerae O1, which was responsible for seasonal outbreaks of cholera in Dhaka during the period 2015 to 2018. In order to delineate the factors responsible for this serotype transition, we performed whole-genome sequencing (WGS) of V. cholerae O1 multidrug-resistant strains...
Wed, 02/26/2020 - 03:34
Author(s): Yibei Zhang, Huanhuan Liu, Dan Gu, Xingxu Lu, Xiaohui Zhou, Xiaodong XiaVibrio parahaemolyticus is a common foodborne pathogen in seafood and represents a major threat to human health worldwide. In this study, we identified that PhoR, a histidine kinase, is involved in the regulation of swarming and flagella assembly. RNA sequencing analysis showed that 1122 genes were differentially...
Wed, 02/26/2020 - 03:29
In Vibrio parahaemolyticus, the iron uptake regulator Fur represses genes involved in iron acquisition and swarming. The Fur regulon also includes a previously uncharacterized regulator fcrX. Overproduction of FcrX, which is a small tetratricopeptide repeat‐containing protein, affects phenotypes in multiple bacterial species. FcrX interacts with V. parahaemolyticus and Escherichia coli Fur....
Mon, 02/24/2020 - 04:11
Author(s): Bowen Chen, Jiaming Huang, Huihui Li, Qiao-Hui Zeng, Jing Jing Wang, Haiquan Liu, Yingjie Pan, Yong ZhaoAbstractVibrio parahaemolyticus is the leading pathogen in seafoods. This study established the efficient blue light-emitting diode (LED) photodynamic inactivation (PDI) to eradicate Vibrio parahaemolyticus and its biofilm with photosensitizer curcumin, and the antibacterial and...
Sun, 02/23/2020 - 03:31
Aims This experimental study focuses on survival and consistence of Vibrio parahaemolyticus in cold water sediments and how increasing temperature and nutritional availability can affect growth. Methods and Results A pathogenic strain of V. parahaemolyticus was inoculated in seawater microcosms containing bottom sediment. Gradually, during 14 days, the temperature was upregulated from 8 to 21°C....
Sat, 02/22/2020 - 03:28
Accumulating evidence has indicated that the multiple drug resistant Vibrio parahaemolyticus may pose a serious threat to public health and economic concerns for humans globally. Here, two lytic bacteriophages, namely vB_VpS_BA3 and vB_VpS_CA8, were isolated from sewage collected in Guangzhou, China. Electron microscopy studies revealed both virions taxonomically belonged to the Siphoviridae...
Fri, 02/21/2020 - 04:19
Like many other pathogens, Vibrio cholerae, the causative agent of cholera, can modulate its gene expression to combat stresses encountered in both aquatic and host environments, including stress posed by reactive oxygen species (ROS). We previously reported that the virulence activator AphB in V. cholerae is involved in ROS resistance. In this study, we found that another key virulence regulator...
Fri, 02/21/2020 - 04:19
Multidrug efflux systems belonging to the resistance-nodulation-division (RND) superfamily are ubiquitous in Gram-negative bacteria. RND efflux systems are often associated with multiple antimicrobial resistance and also contribute to the expression of diverse bacterial phenotypes including virulence, as documented in the intestinal pathogen Vibrio cholerae, the causative agent of the severe...
Thu, 02/20/2020 - 03:39
Author(s): Xiao-bo Yan, Xiao-hui Dong, Bei-ping Tan, Shuang Zhang, Shu-yan Chi, Qi-huiYang, Hong-yu Liu, Yuan-zhi YangAbstractThe aim of this study was to investigate the effects of feeding alternative dietary oils to hybrid grouper fish (♀Epinephelus fuscoguttatus × ♂E. lanceolatu) on their growth, histological morphology of hepatocytes, disease resistance, immune response, and expression of...
Thu, 02/20/2020 - 03:29
The sessile biofilms of Vibrio parahaemolyticus and Listeria monocytogenes have increasingly become a critical threat in seafood safety. This study aimed to evaluate the effects of modified atmospheres on the formation ability of V. parahaemolyticus and L. monocytogenes biofilms. The stress responses of bacterial biofilm formation to modified atmospheres including anaerobiosis (20% carbon dioxide...
Wed, 02/19/2020 - 03:43
Melanin is a pigment produced by organisms throughout all domains of life. Due to its unique physicochemical properties, biocompatibility, and biostability, there has been an increasing interest in the use of melanin for broad applications. In the vast majority of studies, melanin has been either chemically synthesized or isolated from animals, which has restricted its use to small-scale...
Wed, 02/19/2020 - 03:43
This study aimed at establishing the effects of attenuated starters and surface bacteria on various features of caciotta cheese. The cheese undergoes a ripening period during which the house microbiota contaminates the surface. Conventional cheese (the control cheese [CC]) is made using only primary starters. Primary starters and attenuated (i.e., unable to grow and synthesize lactic acid)...
Sat, 02/15/2020 - 03:37
by Samit Watve, Kelsey Barrasso, Sarah A. Jung, Kristen J. Davis, Lisa A. Hawver, Atul Khataokar, Ryan G. Palaganas, Matthew B. Neiditch, Lark J. Perez, Wai-Leung Ng Many bacteria use quorum sensing (QS) to regulate virulence factor production in response to changes in population density. QS is mediated through the production, secretion, and detection of signaling molecules called autoinducers (...
Sat, 02/15/2020 - 03:36
Author(s): Ryunkyoung Oh, Min Jeong Lee, Young-Ok Kim, Bo-Hye Nam, Hee Jeong Kong, Ju-Won Kim, Jung-yeon Park, Jung-Kil Seo, Dong-Gyun KimAbstractWe isolated and purified an antimicrobial peptide (AMP) from the mantle of the hard-shelled mussel, Mytilus coruscus. The peptide was purified through C18 reversed-phase high-performance liquid chromatography, and displayed antibacterial activity. Total...
Sat, 02/15/2020 - 03:27
The caspase family proteins are aspartate‐specific cysteine proteases that transmit extracellular signals to cells, ultimately cause apoptosis and therefore play a key role in cellular immunity. In this study, we cloned and characterized three caspases from Chinese black sleeper (Bostrychus sinensis), Bscasp‐1, Bscasp‐8 and Bscasp‐9. Real‐time PCR analysis showed that Bscasp‐1, Bscasp‐8 and...
Thu, 02/13/2020 - 03:47
Chitosan with higher molecular weight exhibited higher antimicrobial efficacy against foodborne pathogens. However, the poor water solubility of higher or medium molecular weight chitosan limits its applications. To overcome the challenge, our research team was searching for simple preparation procedure for fast dissolving MMW chitosan in water. Through the process, we were also able to obtain a...
Wed, 02/12/2020 - 10:50
Author(s): Jiahua Xing, Jia Yu, Yin LiuAbstractVibrio parahaemolyticus, a major food-borne pathogen, is a gram-negative rod-shaped halophilic bacterium which inhabits marine environments throughout the world. It can pose a threat to humans after the consumption of raw or undercooked seafood. Fast detection is crucial for hindering and controlling V. parahaemolyticus infection. Compared with...
Wed, 02/12/2020 - 03:25
The subject of analysis in this report was the antibiotic susceptibility of V. cholerae under glucose supplementation since the metabolites can significantly alter the antibiotic sensitivity of bacteria. Glucose could change the antibiotic susceptibility in a growth phase-dependent manner, however, the antibiotic susceptibility of exponentially growing cells was not affected in the presence of...
Mon, 02/10/2020 - 04:11
Author(s): Xu Li, Lin Zhao, He Gao, Long Chen, Fenxia Fan, Zhe Li, Yufeng Fan, Jie Li, Weili Liang, Bo Pang, Biao KanAbstractIn Vibrio cholerae, the lysogenic bacteriophage CTXΦ carries the cholera toxin genes ctxAB, which can be transferred from toxigenic strains to nontoxigenic strains through infection and lysogenic conversion of CTXΦ. This phage also has the precursor genome which does not...
Mon, 02/10/2020 - 04:09
Author(s): Rafaela C. Baptista, Heber Rodrigues, Anderson S. Sant'AnaAbstractThe present work aimed to evaluate the frequency of seafood consumption by the Brazilian population, the safety practices during seafood handling and preservation as well as to evaluate the consumers’ perception on the risks associated with these foods. A total of 962 respondents responded to a survey divided into three...
Fri, 02/07/2020 - 04:16
Author(s): Zhuoxing Zhang, Chao Zhang, Xiaoling Dai, Ruidong Zhang, Xueying Cao, Kaiqiang Wang, Xin Huang, Qian RenAbstractNuclear factor κB (NF-κB) plays a key role in the innate immunity of invertebrates. Relish belongs to the NF-κB family. In insects, alternative splicing induces the sequence diversity of the Relish gene. However, information on the roles of various relish isoforms in...
Fri, 02/07/2020 - 04:16
Author(s): Le Fei Jiao, Tian Meng Dai, Sun Qian Zhong, Min Jin, Peng Sun, Qi Cun ZhouAbstractThe intestine is the primary target of pathogenic microbes during invasion. However, the interaction of Vibrio parahaemolyticus (V. parahaemolyticus) with intestinal epithelial cells and its effects on the intestinal function of Litopenaeus vannamei (L. vannamei) are poorly studied. Therefore, the aim of...
Wed, 02/05/2020 - 03:27
The objective of this study was to determine whether seeds of Brassica oleracea var. italica (i.e. broccoli, an edible plant) produce defensins that inhibit phytopathogenic fungi and pathogenic bacteria of clinical significance. Crude extracts obtained from broccoli seeds were fractioned by molecular exclusion techniques and analyzed by liquid chromatography-high-resolution mass spectrometry. Two...
Wed, 02/05/2020 - 03:26
Fresh foods are vulnerable to foodborne pathogens which cause foodborne illness and endanger people’s life and safety. The rapid detection of foodborne pathogens is crucial for food safety surveillance. An in situ-synthesized gene chip for the detection of foodborne pathogens on fresh-cut fruits and vegetables was developed. The target genes were identified and screened by comparing the specific...
Mon, 02/03/2020 - 03:34
Author(s): Yan-li Su, Guang-hua Wang, Jing-jing Wang, Bing Xie, Qin-qin Gu, Dong-fang Hao, Hong-mei Liu, Min ZhangAbstractAt present, several reports have indicated that the C-terminal peptides of tissue factor pathway inhibitor 1 (TFPI-1) were active antibacterial peptides. However, the functions of TFPI-1 C-terminal peptides in teleost are still very limited. In this study, a C-terminal peptide...
Fri, 01/31/2020 - 03:29
Salmonella enterica, Listeria monocytogenes, Shigella flexneri, Escherichia coli O157:H7, Vibrio parahaemolyticus, Staphylococcus aureus, Vibrio cholerae, Clostridium botulinum type A, Bacillus cereus, Clostridium perfringens Alpha toxin, and Yersinia enterocolitica are 11 common foodborne pathogens. Traditional bacterial culture methods for detecting pathogens are time‐consuming and labor‐...
Thu, 01/30/2020 - 03:25
Vibrio parahaemolyticus (Vp), a major food-borne pathogen, is responsible for severe infections such as gastroenteritis and septicemia, which may be accompanied by life-threatening complications. While studies have evaluated factors that affect the virulence of the pathogen, none have investigated the interaction of Vp with gut microbiota. To address this knowledge gap, we compared the effect of...
Thu, 01/30/2020 - 03:25
An estimated 700 000 soldiers belonging to the Union Army and the Confederate States Army died in the 1861–65 American Civil War.1 Many camp epidemics attributed to dysentery, typhoid fever, measles, smallpox, cholera, and malaria spread quickly among the troops, affecting the Confederate Army more and surely to some extent shaping the outcome of the war.2
Wed, 01/29/2020 - 04:01
Author(s): Nguyen Nhat Minh Phuong, Thien Trung Le, John Van Camp, Katleen RaesAbstractMicrobial safety in food products is not always adequately controlled. Chemical antimicrobials which are recognized as hazards to human health are gradually replaced by natural antimicrobial compounds. In the current study, the antimicrobial activity against some Gram-positive and Gram- negative bacteria by the...
Sun, 01/26/2020 - 03:27
Aim The current study was conducted to determine the incidence, antibiotic resistance and virulence genes of Vibrio strains isolated from ready‐to‐eat shrimps in Edo and Delta States, Nigeria. Methods and Results A total of 1440 ready‐to‐eat shrimp's samples were obtained from open markets from November 2016 to October 2017 and analysed using standard culture‐based procedures. Overall, our result...
Fri, 01/24/2020 - 03:33
Author(s): Junjie Nie, Zhixue Yu, Defu Yao, Fan Wang, Chunhua Zhu, Kaihui Sun, Jude Juventus Aweya, Yueling ZhangAbstractThe histone deacetylase, sirtuin 6 (SIRT6), plays an essential role in the regulation of oxidative stress, mitochondrial function and inflammation in mammals. However, the specific role of SIRT6 in invertebrate immunity has not been reported. Here, we characterized for the...
Fri, 01/24/2020 - 03:26
Populations of the bacterium Vibrio cholerae consist of dozens of distinct lineages, with primarily (but not exclusively) members of the pandemic generating (PG) lineage capable of causing the diarrheal disease cholera. Assessing composition and temporal dynamics of such populations requires extensive isolation efforts and thus only rarely covers large geographic areas or timeframes exhaustively...
Sat, 01/18/2020 - 03:23
Biofilms provide bacteria with protection from environmental stresses and host immune defenses. The pathogenic marine bacterium Vibrio vulnificus forms biofilms and colonizes environmental niches such as oysters. The cabABC operon encodes an extracellular matrix protein CabA and the corresponding type I secretion system, which are essential for biofilm and rugose colony development of V....
Wed, 01/15/2020 - 03:25
Nanogold enhanced surface plasmon resonance (SPR), colloidal gold immunochromatographic test strips (ICTS), and polymerase chain reaction (PCR), combined with immunomagnetic separation (IMS) were established in this study for the rapid detection of Vibrio parahaemolyticus (VP). The sensitivities of SPR, ICTS, and PCR was determined to be 101, 103, and 103 CFU/mL for VP, respectively. After...
Tue, 01/14/2020 - 03:34
The marine bacterium and human pathogen Vibrio parahaemolyticus rapidly colonizes surfaces by using swarming motility and forming robust biofilms. Entering either colonization program, swarming motility or sessility, involves differential regulation of many genes resulting in a dramatic shift in physiology and behavior. V. parahaemolyticus has evolved complex regulation to control these two...
Thu, 01/09/2020 - 04:05
Author(s): Hourong Liu, Chengwen Song, Junhao Ning, Yuan Liu, Zhaoxia CuiAbstractVariable lymphocyte receptors (VLRs) play an important role via their antigen-special reorganization in jawless vertebrates (agnathans) adaptive immune response. In the present study, the open reading frame (ORF) of Eriocheir sinensis VLRA (designated as EsVLRA) was identified. EsVLRA comprised a 799-amino-acid...
Wed, 01/08/2020 - 03:40
Steryl esters (SEs) are important storage compounds in many eukaryotes and are often prominent components of intracellular lipid droplets. Here, we demonstrate that selected Actino- and Proteobacteria growing on sterols are also able to synthesize SEs and to sequester them in cytoplasmic lipid droplets. We found cholesteryl ester (CE) formation in members of the actinobacterial genera Rhodococcus...
Wed, 01/08/2020 - 03:39
Author(s): Xifeng Qiao, Pingchao Li, Jianan He, Zeshu Yu, Jiaxing Chen, Liangge He, Xue Yu, Haoran Lin, Danqi Lu, Yong ZhangAbstractScavenger receptors play a central role in defending against infectious diseases in mammals. However, the function of SRECII remains unknown in teleost fish. In this study, type F scavenger receptor expressed by endothelial cells-II (SRECII) cDNA sequence was first...
Wed, 01/08/2020 - 03:27
M. Abanto et al. We report transcontinental expansion of Vibrio parahaemolyticus sequence type 36 into Lima, Peru. From national collections, we identified 7 isolates from 2 different Pacific Northwest complex lineages that surfaced during 2011–2016. Sequence type 36 is likely established in environmental reservoirs. Systematic surveillance enabled detection of these epidemic isolates.
Sat, 01/04/2020 - 03:36
Author(s): Chao Zhang, Xueying Cao, Kaiqiang Wang, Xiaoling Dai, Ruidong Zhang, Zhuoxing Zhang, Xin Huang, Qian RenAbstractTranscription factor activator protein 1 (AP1) plays an irreplaceable role in the response to a variety of external stimulants, such as cellar stress, bacterial and viral infections, and inflammatory cytokines. In this study, we identified a novel AP1 gene from Macrobrachium...
Sat, 01/04/2020 - 03:36
Author(s): Xiaoling Dai, Xin Huang, Zhuoxing Zhang, Ruidong Zhang, Xueying Cao, Chao Zhang, Kaiqiang Wang, Qian RenAbstractInnate immunity is the primary defense of crustaceans against pathogens. Crustins, as antimicrobial peptides, are important to crustacean innate immunity. In this study, two kinds of Gly-rich crustin genes were cloned from Macrobrachium nipponense and were referred to as Mn-...
Sat, 01/04/2020 - 03:36
Author(s): Lei Liu, Yunfei DangAbstractMannose-binding lectin (MBL) is a crucial pattern recognition receptor in the host innate immune system. Previously, we reported the biological function of Ctenopharyngodon idella MBL (CiMBL) in initiating the lectin pathway of the complement system. In the present study, we further explored its biological function including the agglutinating ability,...
Wed, 12/25/2019 - 03:34
ABSTRACT The dinucleotide second messenger c-di-GMP has emerged as a central regulator of reversible cell attachment during bacterial biofilm formation. A prominent cell adhesion mechanism first identified in pseudomonads combines two c-di-GMP-mediated processes: transcription of a large adhesin and its cell surface display via posttranslational proteolytic control. Here, we characterize an...
Wed, 12/25/2019 - 03:34
ABSTRACT The Gram-negative marine bacterium Vibrio parahaemolyticus is a common cause of infectious gastroenteritis due to the ingestion of contaminated seafood. Most virulent V. parahaemolyticus strains encode two type III secretion systems (T3SS1 and T3SS2); however, the roles they and their translocated effectors play in causing intestinal disease remain unclear. While studies have identified...
Wed, 12/25/2019 - 03:34
ABSTRACT In Vibrio species, chitin-induced natural transformation enables bacteria to take up DNA from the external environment and integrate it into their genome. Expression of the master competence regulator TfoX bypasses the need for chitin induction and drives expression of the genes required for competence in several Vibrio species. Here, we show that TfoX expression in Vibrio campbellii...
Tue, 12/24/2019 - 03:34
The intrinsic resistance of Pseudomonas aeruginosa to many antibiotics limits treatment options for pseudomonal infections. P. aeruginosa's outer membrane is highly impermeable and decreases antibiotic entry into the cell. We used an unbiased, high-throughput approach to examine mechanisms underlying outer membrane-mediated antibiotic exclusion. Insertion Sequencing (INSeq) identified genes that...
Tue, 12/24/2019 - 03:26
Vibrio cholerae is a waterborne bacterium responsible for worldwide outbreaks of acute and fatal cholera. Recently, small regulatory RNAs (sRNAs) have become increasingly recognized as important regulators of virulence gene expression in response to environmental signals. In this study, we determined that two component system EnvZ/OmpR was required for intestinal colonization in V. cholerae O1 EI...
Tue, 12/24/2019 - 03:26
Bacteria in nature are widely exposed to differential fluid shears which are often a trigger for phenotypic switches. The latter mediates transcriptional and translation remodeling of cellular metabolism impacting among others virulence, antimicrobial resistance and stress resistance. In this study, we evaluated the role of fluid shear on phenotypic switch in an acute hepatopancreatic necrosis...
Sun, 12/22/2019 - 03:23
Vibrioparahaemolyticus is a leading seafood-borne pathogen that causes gastroenteritis, septicemia, and serious wound infections due to the actions of virulence-associated proteins. We compared the extracellular proteins of nonvirulent JHY20 and virulent ATCC 33847 V. parahaemolyticus reference strains. Eighteen extracellular proteins were identified from secretory profiles, and 11 (68.75%) of...

Pages