keyword
MENU ▼
Read by QxMD icon Read
search

Streptococcus agalactiae

keyword
https://www.readbyqxmd.com/read/28107386/regulation-of-pi-2b-pilus-expression-in-hypervirulent-streptococcus-agalactiae-st-17-bm110
#1
Bruno Périchon, Noémi Szili, Laurence du Merle, Isabelle Rosinski-Chupin, Myriam Gominet, Samuel Bellais, Claire Poyart, Patrick Trieu-Cuot, Shaynoor Dramsi
The widely spread Streptococcus agalactiae (also known as Group B Streptococcus, GBS) "hypervirulent" ST17 clone is strongly associated with neonatal meningitis. The PI-2b locus is mainly found in ST17 strains but is also present in a few non ST17 human isolates such as the ST-7 prototype strain A909. Here, we analysed the expression of the PI-2b pilus in the ST17 strain BM110 as compared to the non ST17 A909. Comparative genome analyses revealed the presence of a 43-base pair (bp) hairpin-like structure in the upstream region of PI-2b operon in all 26 ST17 genomes, which was absent in the 8 non-ST17 strains carrying the PI-2b locus...
2017: PloS One
https://www.readbyqxmd.com/read/28091535/visualization-of-the-role-of-host-heme-on-the-virulence-of-the-heme-auxotroph-streptococcus-agalactiae
#2
Laetitia Joubert, Jean-Baptiste Dagieu, Annabelle Fernandez, Aurélie Derré-Bobillot, Elise Borezée-Durant, Isabelle Fleurot, Alexandra Gruss, Delphine Lechardeur
Heme is essential for several cellular key functions but is also toxic. Whereas most bacterial pathogens utilize heme as a metabolic cofactor and iron source, the impact of host heme during bacterial infection remains elusive. The opportunist pathogen Streptococcus agalactiae does not synthesize heme but still uses it to activate a respiration metabolism. Concomitantly, heme toxicity is mainly controlled by the HrtBA efflux transporter. Here we investigate how S. agalactiae manages heme toxicity versus benefits in the living host...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28089896/characterization-and-expression-analysis-of-a-chitinase-gene-pmchi-4-from-black-tiger-shrimp-penaeus-monodon-under-pathogen-infection-and-ambient-ammonia-nitrogen-stress
#3
Kaimin Zhou, Falin Zhou, Jianhua Huang, Qibin Yang, Song Jiang, Lihua Qiu, Lishi Yang, Caiyan Zhu, Shigui Jiang
Chitinase is a multi-gene family, which play important physiological roles in crustaceans, involved in several biological processes, including digestion, molting and defense against viruses. In the present study, a chitinase-4 gene (PmChi-4) was cloned from Penaeus monodon by rapid amplification of cDNA ends (RACE). The full length of PmChi-4 cDNA was 2178 bp, including an 1815 bp open reading frame (ORF) which encoded 604 amino acid residues. The predicted PmChi-4 protein was 67.7 kDa and shared 61%-88% identity with the type of Chi-4s from other crustaceans...
January 9, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28088470/the-effects-of-dietary-kefir-and-low-molecular-weight-sodium-alginate-on-serum-immune-parameters-resistance-against-streptococcus-agalactiae-and-growth-performance-in-nile-tilapia-oreochromis-niloticus
#4
Hien Van Doan, Seyed Hossein Hoseinifar, Wanaporn Tapingkae, Pimporn Khamtavee
The present study evaluates the effects of dietary kefir and low molecular weight sodium alginate (LWMSA) (singular or combined) on non-specific immune response, disease resistance and growth performance of Nile tilapia (Oreochromis niloticus). Fish with average weight of 18.60 ± 0.04 g were supplied and randomly stocked in sixteen glass tanks (150 L) at density of 20 fish per tank. Fish were fed experimental diets as follows: 0 g kg(-1) LMWSA (Control, Diet 1), 10 g kg(-1) LMWSA (Diet 2), 40 g kg(-1) kefir (Diet 3), and 10 g kg(-1) LMWSA + 40 g kg(-1) kefir (Diet 4) for 50 days...
January 11, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28067833/contribution-of-the-rgfd-quorum-sensing-peptide-to-rgf-regulation-and-host-cell-association-in-group-b-streptococcus
#5
Robert E Parker, David Knupp, Rim Al Safadi, Agnѐs Rosenau, Shannon D Manning
Streptococcus agalactiae (group B Streptococcus; GBS) is a common inhabitant of the genitourinary and/or gastrointestinal tract in up to 40% of healthy adults; however, this opportunistic pathogen is able to breach restrictive host barriers to cause disease and persist in harsh and changing conditions. This study sought to identify a role for quorum sensing, a form of cell to cell communication, in the regulation of the fibrinogen-binding (rgfBDAC) two-component system and the ability to associate with decidualized endometrial cells in vitro...
January 6, 2017: Genes
https://www.readbyqxmd.com/read/28063953/pathological-analysis-detection-of-antigens-fasl-expression-analysis-and-leucocytes-survival-analysis-in-tilapia-oreochromis-niloticus-after-infection-with-green-fluorescent-protein-labeled-streptococcus-agalactiae
#6
Jingyuan Wang, Jinying Wu, Liyuan Yi, Zengxin Hou, Wensheng Li
The pathogenesis of Streptococcus agalactiae infection in tilapia has not been fully described. To understand this, we investigated the clinic-pathological features of acute experimental septicemia in tilapia (Oreochromis niloticus) after receiving an intra-peritoneal injection with S. agalactiae THN-1901GFP. Immunohistochemistry and sections of pathological tissues were used to estimate the level of damage in the head-kidney, liver, spleen and trunk-kidney. The expression of FasL was analyzed by western blotting in these samples based on their damage levels...
January 4, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28057750/whole-genome-sequences-and-classification-of-streptococcus-agalactiae-strains-isolated-from-laboratory-reared-long-evans-rats-rattus-norvegicus
#7
C Bodi Winn, J Dzink-Fox, Y Feng, Z Shen, V Bakthavatchalu, J G Fox
In collaboration with the CDC's Streptococcus Laboratory, we report here the whole-genome sequences of seven Streptococcus agalactiae bacteria isolated from laboratory-reared Long-Evans rats. Four of the S. agalactiae isolates were associated with morbidity accompanied by endocarditis, metritis, and fatal septicemia, providing an opportunity for comparative genomic analysis of this opportunistic pathogen.
January 5, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28053508/critical-role-of-tedizolid-in-the-treatment-of-acute-bacterial-skin-and-skin-structure-infections
#8
REVIEW
Olivia Ferrández, Olatz Urbina, Santiago Grau
Tedizolid phosphate has high activity against the Gram-positive microorganisms mainly involved in acute bacterial skin and skin structure infections, such as strains of Staphylococcus aureus (including methicillin-resistant S. aureus strains and methicillin-sensitive S. aureus strains), Streptococcus pyogenes, Streptococcus agalactiae, the Streptococcus anginosus group, and Enterococcus faecalis, including those with some mechanism of resistance limiting the use of linezolid. The area under the curve for time 0-24 hours/minimum inhibitory concentration (MIC) pharmacodynamic ratio has shown the best correlation with the efficacy of tedizolid, versus the time above MIC ratio and the maximum drug concentration/minimum inhibitory concentration ratio...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28045978/cord-blood-acute-phase-reactants-predict-early-onset-neonatal-sepsis-in-preterm-infants
#9
Leena B Mithal, Hannah L Palac, Ram Yogev, Linda M Ernst, Karen K Mestan
BACKGROUND: Early onset sepsis (EOS) is a major cause of morbidity and mortality in preterm infants, yet diagnosis remains inadequate resulting in missed cases or prolonged empiric antibiotics with adverse consequences. Evaluation of acute phase reactant (APR) biomarkers in umbilical cord blood at birth may improve EOS detection in preterm infants with intrauterine infection. METHODS: In this nested case-control study, infants (29.7 weeks gestation, IQR: 27.7-32...
2017: PloS One
https://www.readbyqxmd.com/read/28036311/etiological-profile-of-early-neonatal-bacterial-sepsis-by-multiplex-qpcr
#10
Walter P Silva-Junior, Almir S Martins, Paula C N Xavier, Kelly L A Appel, Silvio A Oliveira Junior, Durval B Palhares
INTRODUCTION: Given the major impact in terms of morbidity and mortality that episodes of early neonatal sepsis (ENS) have on both newborns and health systems, this study aimed to identify the etiological profile of early neonatal bacterial sepsis by a multiplex quantitative real-time polymerase chain reaction (qPCR). METHODOLOGY: Blood samples from newborns diagnosed with clinical ENS and hospitalized in neonatal intensive care units (NICUs) were collected and analyzed using the multiplex qPCR method to detect Streptococcus agalactiae, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Enterobacter sp...
December 30, 2016: Journal of Infection in Developing Countries
https://www.readbyqxmd.com/read/28032700/management-of-acute-hematogenous-infection-following-total-knee-arthroplasty-a-case-series-of-11-patients
#11
Rui He, Liu Yang, Lin Guo, Hao Chen, Ying Zhang, Dian-Ming Jiang
OBJECTIVE: Acute hematogenous infection is a devastating complication that can occur after total knee arthroplasty (TKA). The best strategies for management of this infection remain controversial. Two-stage revision has been well described as the gold standard for the management of chronic late infections. However, there is a paucity of information presently available on the management and outcomes of patients treated for acute hematogenous infections. The purpose of the present study was to report the outcome of acute hematogenous infections following TKA with the treatment of irrigation, debridement, and retention of the prosthetic components...
November 2016: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28032541/molecular-characteristics-of-streptococcus-agalactiae-deficient-in-alpha-like-protein-encoding-genes
#12
Christina Gabrielsen, Johan Andreas Mæland, Randi Valsø Lyng, Randreas Radtke, Jan Egil Afset
Streptococcus agalactiae (group B streptococci; GBS) are important human and animal pathogens, which can be subdivided based on different capsular polysaccharides and surface-anchored alpha-like proteins (Alp), as well as other proteins. Nearly all GBS strains possess an Alp (Alp GBS), although Alp negative GBS (non-Alp GBS) do occur. In this study 10 (1.1%) of 932 clinical human GBS tested lacked an Alp encoding gene. All 10 strains were from patients with bloodstream infection, confirming that non-Alp GBS can be highly virulent...
December 28, 2016: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28027988/the-immune-response-of-the-c-jun-in-the-black-tiger-shrimp-penaeus-monodon-after-bacterial-infection
#13
Gongfang Shi, Chao Zhao, Mingjun Fu, Lihua Qiu
The transcription factor C-Jun widely exists in vertebrates and invertebrates and plays an important role in various kinds of stimulus response. In this study, PmC-jun gene was first cloned from Penaeus monodon. The full-length cDNA of PmC-jun was 1857 bp in length and included an 879 bp open reading frame (ORF), which encoded 293 amino acids. qRT-PCR analysis results showed that PmC-jun mRNAs were ubiquitously expressed in all the examined tissues. The highest expression level was observed in gill, followed by hepatopancreas...
December 24, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28017418/bacterial-characterization-in-ambient-submicron-particles-during-severe-haze-episodes-at-ji-nan-china
#14
Caihong Xu, Min Wei, Jianmin Chen, Xinfeng Wang, Chao Zhu, Jiarong Li, Lulu Zheng, Guodong Sui, Weijun Li, Wenxing Wang, Qingzhu Zhang, Abdelwahid Mellouki
In January 2014, severe haze episodes which sweep across Chinese cities have attracted public concern and interest at home and abroad. In addition to the physicochemical properties of air pollutants, bacteria are thought to be responsible for the spread of respiratory diseases and various allergies. We attempted the bacterial characterization of submicron particles (PM0.18-0.32, PM0.32-0.56, and PM0.56-1) under severe haze episodes using high-throughput sequencing and real-time quantitative PCR detecting system based on 21 samples collected from January to March 2014 at Ji'nan, China...
December 22, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/28011914/the-streptococcus-agalactiae-virulence-regulator-covr-affects-the-pathogenesis-of-urinary-tract-infection
#15
Matthew J Sullivan, Sophie Y Leclercq, Deepak S Ipe, Alison J Carey, Joshua P Smith, Nathan Voller, Allan W Cripps, Glen C Ulett
BACKGROUND: Streptococcus agalactiae can cause urinary tract infection (UTI). The role of the S. agalactiae global virulence regulator, CovR, in UTI pathogenesis is unknown METHODS: We used murine and human bladder uroepithelial cell models of UTI and S. agalactiae mutants in covR and related factors, including -hemolysin/cytolysin ( -h/c), surface-anchored adhesin HvgA, and capsule to study the role of CovR in UTI. RESULTS: covR-deficient serotype III S. agalactiae 874391 was significantly attenuated for colonization in mice and adhesion to uroepithelial cells...
December 23, 2016: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28001191/purple-urine-bag-syndrome-case-report-for-streptoccocus-agalactiae-and-literature-review
#16
Klaus Nunes Ficher, Amanda Azevedo Neves de Araújo, Sandra Gomes de Barros Houly, Paulo Ricardo Gessolo Lins, Moacyr Silva, Aecio Flavio Teixeira de Góis
We report a case of purple urine bag syndrome, associated to Streptococcus agalactiae urinary tract infection, progressing to septic shock and death. We present a review of the literature on the subject and take the opportunity to attend readers about increasing incidence with population aging and its potential bad outcome.
December 2016: Jornal Brasileiro de Nefrologia: ʹorgão Oficial de Sociedades Brasileira e Latino-Americana de Nefrologia
https://www.readbyqxmd.com/read/28000924/streptococcus-agalactiae-outbreaks-in-cultured-golden-pomfret-trachinotus-blochii-lac%C3%A3-p%C3%A3-de-in-singapore
#17
S M Chong, W K Wong, W Y Lee, Z B Tan, Y H Tay, X H Teo, L D Chee, C J Fernandez
No abstract text is available yet for this article.
December 21, 2016: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28000606/development-of-streptococcus-agalactiae-vaccines-for-tilapia
#18
REVIEW
Guangjin Liu, Jielian Zhu, Kangming Chen, Tingting Gao, Huochun Yao, Yongjie Liu, Wei Zhang, Chengping Lu
Vaccination is a widely accepted and effective method to prevent most pathogenic diseases in aquaculture. Various species of tilapia, especially Nile tilapia Oreochromis niloticus, are farmed worldwide because of their high consumer demand. Recently, the tilapia-breeding industry has been hampered by outbreaks of Streptococcus agalactiae infection, which cause high mortality and huge economic losses. Many researchers have attempted to develop effective S. agalactiae vaccines for tilapia. This review provides a summary of the different kinds of S...
December 21, 2016: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/27997716/collagen-like-proteins-of-pathogenic-streptococci
#19
REVIEW
Slawomir Lukomski, Beth A Bachert, Flavia Squeglia, Rita Berisio
The collagen domain, which is defined by the presence of the Gly-X-Y triplet repeats, is amongst the most versatile and widespread known structures found in proteins from organisms representing all three domains of life. The streptococcal collagen-like (Scl) proteins are widely present in pathogenic streptococci, including Streptococcus pyogenes, S. agalactiae, S. pneumoniae, and S. equi. Experiments and bioinformatic analyses support the hypothesis that all Scl proteins are homotrimeric and cell wall-anchored...
December 20, 2016: Molecular Microbiology
https://www.readbyqxmd.com/read/27994401/streptococcus-agalactiae-endophthalmitis-in-boston-keratoprosthesis-in-a-patient-with-steven-johnson-syndrome
#20
Humoud M Al-Otaibi, Mohammed Talea, Omar Kirat, Donald U Stone, William N May, Igor Kozak
A 25-year-old Syrian male with a previous episode of Stevens-Johnson syndrome with bilateral corneal cicatrization previously underwent surgery for Type 1 Boston Keratoprosthesis (K-Pro). Sixteen months after the K-Pro surgery, the patient presented with decreased vision to hand motion and microbial keratitis of the graft around the K-Pro with purulent discharge. Corneal scrapings were nonrevealing. B-scan in 3 days showed increased debris in the vitreous cavity and thickened retinochoroidal layer. Intravitreal tap and injections of vancomycin and ceftazidime were performed...
October 2016: Middle East African Journal of Ophthalmology
keyword
keyword
38694
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"