keyword
MENU ▼
Read by QxMD icon Read
search

Streptococcus suis

keyword
https://www.readbyqxmd.com/read/28642750/non-pylori-helicobacters-nhphs-induce-shifts-in-gastric-microbiota-in-helicobacter-pylori-infected-patients
#1
Xianhui Peng, Liya Zhou, Yanan Gong, Zhiqiang Song, Lihua He, Sanren Lin, Jianzhong Zhang
To explore the effects of gastric non-H. pylori Helicobacter species(NHPH) on the structure and potential function of gastric microbiota, we employed 16S rRNA gene sequencing on 164 gastric biopsy specimens from NHPH (H. suis, H. felis, H. salomonis) /H. pylori coinfection individuals, H. pylori monoinfection individuals and healthy controls. The results demonstrated that marked structural and functional variations between H. pylori mono- and coinfection samples (HPHS, HPHF, HPHM). The changes in bacterial structure induced by NHPH are mainly attributed to their ability of gastric acid secretion inhibition as well as bacterial chemotaxis...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28642597/a-single-amino-acid-polymorphism-in-the-glycosyltransferase-cpsk-defines-four-streptococcus-suis-serotypes
#2
David Roy, Taryn B T Athey, Jean-Philippe Auger, Guillaume Goyette-Desjardins, Marie-Rose Van Calsteren, Daisuke Takamatsu, Masatoshi Okura, Sarah Teatero, Martín Alcorlo, Juan A Hermoso, Mariela Segura, Marcelo Gottschalk, Nahuel Fittipaldi
The capsular polysaccharide (CPS) is the major virulence factor of the emerging zoonotic pathogen Streptococcus suis. CPS differences are also the basis for serological differentiation of the species into 29 serotypes. Serotypes 2 and 1/2, which possess identical gene content in their cps loci, express CPSs that differ only by substitution of galactose (Gal) by N-acetylgalactosamine (GalNAc) in the CPS side chain. The same sugar substitution differentiates the CPS of serotypes 14 and 1, whose cps loci are also identical in gene content...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28632907/preferential-aerosolization-of-bacteria-in-bioaerosols-generated-in-vitro
#3
P Perrott, N Turgeon, L Gauthier-Levesque, C Duchaine
AIMS: Little is known about how bacteria are aerosolized in terms of whether some bacteria will be found in the air more readily than others that are present in the source. This report describes in vitro experiments to compare aerosolization rates (also known as preferential aerosolization) of Gram-positive and Gram negative bacteria as well as rod and coccus shaped bacteria, using two nebulization conditions. METHODS AND RESULTS: A consortium of five bacterial species was aerosolized in a homemade chamber...
June 20, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28629722/the-manganese-efflux-system-mnte-contributes-to-the-virulence-of-streptococcus-suis-serotype-2
#4
Jiali Xu, Chengkun Zheng, Manman Cao, Ting Zeng, Xigong Zhao, Guolin Shi, Huanchun Chen, Weicheng Bei
Manganese is an essential micronutrient to bacteria and plays an important role in bacterial physiology. However, an excess of manganese is extremely deleterious to the cell. The manganese efflux system is used to control intracellular manganese levels by some bacteria. In this study, we have identified a cation efflux family protein (MntE) that functions as a manganese export system in Streptococcus suis serotype 2. To investigate the role of mntE in S. suis 2, a mntE deletion mutant (ΔmntE) and the corresponding complementation strain (CΔmntE) were constructed...
June 16, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28622857/streptococcus-suis-serotype-9-strain-gz0565-contains-a-type-vii-secretion-system-putative-substrate-esxa-that-contributes-to-bacterial-virulence-and-a-vanz-like-gene-that-confers-resistance-to-teicoplanin-and-dalbavancin-in-streptococcus-agalactiae
#5
Liying Lai, Jiao Dai, Huanyu Tang, Shouming Zhang, Chunyan Wu, Wancen Qiu, Chengping Lu, Huochun Yao, Hongjie Fan, Zongfu Wu
Streptococcus suis (SS), an important pathogen for pigs, is not only considered as a zoonotic agent for humans, but is also recognized as a major reservoir of antimicrobial resistance contributing to the spread of resistance genes to other pathogenic Streptococcus species. In addition to serotype 2 (SS2), serotype 9 (SS9) is another prevalent serotype isolated from diseased pigs. Although many SS strains have been sequenced, the complete genome of a non-SS2 virulent strain has been unavailable to date. Here, we report the complete genome of GZ0565, a virulent strain of SS9, isolated from a pig with meningitis...
June 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28622084/the-streptococcus-suis-factor-h-binding-protein-a-key-to-unlocking-the-blood-brain-barrier-and-access-the-central-nervous-system
#6
Jean-Philippe Auger, Marcelo Gottschalk
No abstract text is available yet for this article.
June 16, 2017: Virulence
https://www.readbyqxmd.com/read/28620262/prevalence-of-multiple-drug-resistant-streptococcus-suis-in-and-around-guwahati-india
#7
Mrinalee Devi, Jyoti B Dutta, Swaraj Rajkhowa, Dhireswar Kalita, Girindra Kumar Saikia, Bipin Chandra Das, Razibuddin Ahmed Hazarika, Gauranga Mahato
AIM: This study was conducted to determine the prevalence and antimicrobial susceptibility of Streptococcus suis and their resistance patterns isolated from both clinically healthy carriers and diseased pigs in and around Guwahati, Assam, India. MATERIALS AND METHODS: A total of 497 samples were collected during October, 2012, to April, 2014, from clinically healthy (n=67) and diseased (n=230) pigs of varying age and either sex maintained under organized and unorganized farming systems...
May 2017: Veterinary World
https://www.readbyqxmd.com/read/28619168/comparison-of-asian-porcine-high-fever-disease-isolates-of-porcine-reproductive-and-respiratory-syndrome-virus-to-united-states-isolates-for-their-ability-to-cause-disease-and-secondary-bacterial-infection-in-swine
#8
Susan L Brockmeier, Crystal L Loving, Mitchel V Palmer, Allyn Spear, Tracy L Nicholson, Kay S Faaberg, Kelly M Lager
Epidemiologic data from Asian outbreaks of highly-pathogenic (HP) porcine reproductive and respiratory syndrome virus (PRRSV) suggest that disease severity was associated with both the virulence of the PRRSV isolates and secondary bacterial infections. Previous reports have indicated that U.S. isolates of PRRSV predispose to secondary bacterial infections as well, but the severity of disease that occurred in Asia in pigs infected with these HP-PRRSV strains has not been reported in the U.S. The objectives of this research were to compare the pathogenesis of Asian and U...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28567041/pathogen-reactive-t-helper-cell-analysis-in-the-pig
#9
Friederike Ebner, Patrycja Schwiertz, Svenja Steinfelder, Robert Pieper, Jürgen Zentek, Nicole Schütze, Christoph G Baums, Gottfried Alber, Peter Geldhof, Susanne Hartmann
There is growing interest in studying host-pathogen interactions in human-relevant large animal models such as the pig. Despite the progress in developing immunological reagents for porcine T cell research, there is an urgent need to directly assess pathogen-specific T cells-an extremely rare population of cells, but of upmost importance in orchestrating the host immune response to a given pathogen. Here, we established that the activation marker CD154 (CD40L), known from human and mouse studies, identifies also porcine antigen-reactive CD4(+) T lymphocytes...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28536561/differences-in-microbiota-membership-along-the-gastrointestinal-tract-of-piglets-and-their-differential-alterations-following-an-early-life-antibiotic-intervention
#10
Chunlong Mu, Yuxiang Yang, Yong Su, Erwin G Zoetendal, Weiyun Zhu
Early-life antibiotic interventions can change the predisposition to disease by disturbing the gut microbiota. However, the impact of antibiotics on gut microbiota in the gastrointestinal tract is not completely understood, although antibiotic-induced alterations in the distal gut have been reported. Here, employing a piglet model, the microbial composition was analyzed by high-throughput 16S rRNA gene sequencing and PICRUSt predictions of metagenome function. The present study showed clear spatial variation of microbial communities in the stomach and intestine, and found that the administration of antibiotics (a mixture of olaquindox, oxytetracycline calcium, kitasamycin) in early life caused markedly differential alterations in the compartmentalized microbiota, with major alterations in their spatial variation in the lumen of the stomach and small intestine...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28516843/potentially-hazardous-streptococcus-suis-strains-latent-in-asymptomatic-pigs-in-a-major-swine-production-area-of-thailand
#11
Nattakan Meekhanon, Sarawan Kaewmongkol, Waraphon Phimpraphai, Masatoshi Okura, Makoto Osaki, Tsutomu Sekizaki, Daisuke Takamatsu
PURPOSE: Carrier pigs have been considered as the major reservoir of Streptococcus suis and couldbe a significant source of human infection. Therefore, we investigated the prevalence and characteristics of latent S. suis in asymptomatic pigs in the pig-farming area of central Thailand, and compared the data to those previously reported in other regions. METHODOLOGY: We collected samples from 340 asymptomatic pigs. S. suis isolates from the samples were confirmed by species-specific PCR (recN PCR)...
May 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28473377/draft-genome-sequence-of-clinical-strain-tani1-of-streptococcus-suis-serotype-5-isolated-from-a-bacteremia-patient-in-japan
#12
Haruno Yoshida, Takayuki Wada, Daisuke Taniyama, Takashi Takahashi
Streptococcus suis is a swine pathogen that causes severe economic damage to the porcine industry. It occasionally evokes zoonotic infection in humans. Here, we report a draft genome sequence of a S. suis serotype 5 strain isolated from a bacteremia patient that was reported by Taniyama et al. (D. Taniyama, M. Sakurai, T. Sakai, T. Kikuchi, and T. Takahashi, IDCases 6:36-38, 2016, https://doi.org/10.1016/j.idcr.2016.09.011).
May 4, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28467144/muramidase-released-protein-of-streptococcus-suis-new-insight-into-its-impact-on-virulence
#13
Christian Schwerk
No abstract text is available yet for this article.
May 3, 2017: Virulence
https://www.readbyqxmd.com/read/28456803/expression-and-characterization-of-serotype-2-streptococcus-suis-arginine-deiminase
#14
Krissana Maneerat, Suganya Yongkiettrakul, Surasak Jiemsup, Pongsri Tongtawe, Marcelo Gottschalk, Potjanee Srimanote
BACKGROUND: Arginine deiminase (ArcA) has been speculated to facilitate the intracellular survival of Streptococcus suis under acidic conditions. However, the physical and biological properties and function of SS2-ArcA have not yet been elucidated. METHODS: Recombinant SS2-ArcA (rSS2-ArcA) was expressed and purified using Ni-NTA affinity chromatography. Under various pH and temperature conditions, the enzymatic properties of purified rSS2-ArcA and crude native SS2-ArcA were determined...
April 29, 2017: Journal of Molecular Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28425925/evaluation-of-the-immunomodulatory-properties-of-streptococcus-suis-and-group-b-streptococcus-capsular-polysaccharides-on-the-humoral-response
#15
Cynthia Calzas, Morgan Taillardet, Insaf Salem Fourati, David Roy, Marcelo Gottschalk, Hugo Soudeyns, Thierry Defrance, Mariela Segura
Streptococcus suis and group B Streptococcus (GBS) are encapsulated streptococci causing septicemia and meningitis. Antibodies (Abs) against capsular polysaccharides (CPSs) have a crucial protective role, but the structure/composition of the CPS, including the presence of sialic acid, may interfere with the generation of anti-CPS Ab responses. We investigated the features of the CPS-specific Ab response directed against S. suis serotypes 2 and 14 and GBS serotypes III and V after infection or immunization with purified native or desialylated CPSs in mice...
April 20, 2017: Pathogens
https://www.readbyqxmd.com/read/28407026/streptococcal-adhesin-p-sadp-contributes-to-streptococcus-suis-adhesion-to-the-human-intestinal-epithelium
#16
Maria Laura Ferrando, Niels Willemse, Edoardo Zaccaria, Yvonne Pannekoek, Arie van der Ende, Constance Schultsz
BACKGROUND: Streptococcus suis is a zoonotic pathogen, causing meningitis and septicemia. We previously demonstrated that the gastrointestinal tract (GIT) is an entry site for zoonotic S. suis infection. Here we studied the contribution of Streptococcal adhesin Protein (SadP) to host-pathogen interaction at GIT level. METHODS: SadP expression in presence of Intestinal Epithelial Cells (IEC) was compared with expression of other virulence factors by measuring transcript levels using quantitative Real Time PCR (qRT-PCR)...
2017: PloS One
https://www.readbyqxmd.com/read/28402705/interaction-of-factor-h-binding-protein-of-streptococcus-suis-with-globotriaosylceramide-promotes-the-development-of-meningitis
#17
Decong Kong, Zhe Chen, Junping Wang, Qingyu Lv, Hua Jiang, Yuling Zheng, Maokai Xu, Xuyu Zhou, Huaijie Hao, Yongqiang Jiang
Streptococcus suis is an important emerging zoonotic agent that causes acute bacterial meningitis in humans with high mortality and morbidity. Our previous work showed that factor H-binding protein (Fhb) contributed to virulence of S. suis, but the role of Fhb in the development of S. suis meningitis remained unclear. In this study, we demonstrated for the first time that Fhb contributed to the traversal of S. suis across the human blood-brain barrier by allelic-exchange mutagenesis, complementation and specific antibody blocking studies...
April 12, 2017: Virulence
https://www.readbyqxmd.com/read/28379509/a-locus-encoding-variable-defence-systems-against-invading-dna-identified-in-streptococcus-suis
#18
Masatoshi Okura, Takashi Nozawa, Takayasu Watanabe, Kazunori Murase, Ichiro Nakagawa, Daisuke Takamatsu, Makoto Osaki, Tsutomu Sekizaki, Marcelo Gottschalk, Shigeyuki Hamada, Fumito Maruyama
Streptococcus suis, an important zoonotic pathogen, is known to have an open pan-genome and to develop a competent state. In S. suis, limited genetic lineages are suggested to be associated with zoonosis. However, little is known about the evolution of diversified lineages and their respective phenotypic or ecological characteristics. In this study, we performed comparative genome analyses of S. suis, with a focus on the competence genes, mobile genetic elements (MGEs), and genetic elements related to various defence systems against exogenous DNAs (defence elements) that are associated with gene gain/loss/exchange mediated by horizontal DNA movements and their restrictions...
April 4, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28373968/streptococcus-suis-serotype-2-biofilms-inhibit-the-formation-of-neutrophil-extracellular-traps
#19
Fang Ma, Li Yi, Ningwei Yu, Guangyu Wang, Zhe Ma, Huixing Lin, Hongjie Fan
Invasive infections caused by Streptococcus suis serotype 2 (SS2) has emerged as a clinical problem in recent years. Neutrophil extracellular traps (NETs) are an important mechanism for the trapping and killing of pathogens that are resistant to phagocytosis. Biofilm formation can protect bacteria from being killed by phagocytes. Until now, there have only been a few studies that focused on the interactions between bacterial biofilms and NETs. SS2 in both a biofilm state and a planktonic cell state were incubated with phagocytes and NETs, and bacterial survival was assessed...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28373868/morin-attenuates-streptococcus-suis-pathogenicity-in-mice-by-neutralizing-suilysin-activity
#20
Gen Li, Gejin Lu, Zhimin Qi, Hongen Li, Lin Wang, Yanhui Wang, Bowen Liu, Xiaodi Niu, Xuming Deng, Jianfeng Wang
Streptococcus suis, a Gram-positive pathogen, is widely recognized as an important agent of swine infection, and it is also known to cause a variety of zoonoses, such as meningitis, polyarthritis and pneumonia. Suilysin (SLY), an extracellular pore-forming toxin that belongs to the cholesterol-dependent cytolysin family, is an essential virulence factor of S. suis capsular type 2 (SS2). Here, we found that morin hydrate (morin), a natural flavonoid that lacks anti-SS2 activity, inhibits the hemolytic activity of SLY, protects J774 cells from SS2-induced injury and protects mice from SS2 infection...
2017: Frontiers in Microbiology
keyword
keyword
5404
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"