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https://www.readbyqxmd.com/read/28088479/three-dimensional-structure-of-full-length-ntrx-an-unusual-member-of-the-ntrc-family-of-response-regulators
#1
Ignacio Fernández, Irina Cornaciu, Mariela Del Carmen Carrica, Emiko Uchikawa, Guillaume Hoffmann, Rodrigo Sieira, José Antonio Márquez, Fernando A Goldbaum
Bacteria sense and adapt to environmental changes using two-component systems (TCS). These signaling pathways are formed by a histidine kinase (HK) that phosphorylates a response regulator (RR), which finally modulates the transcription of target genes. The bacterium Brucella abortus codes for a TCS formed by the HK NtrY and the RR NtrX that participates in sensing low oxygen tension and in generating an adaptive response. NtrX is a modular protein with REC, AAA+ and DNA binding domains, an architecture that classifies it among the NtrC subfamily of RRs...
January 11, 2017: Journal of Molecular Biology
https://www.readbyqxmd.com/read/28081318/clinical-characteristics-and-outcome-of-brucella-endocarditis
#2
Na Du, Feng Wang
BACKGROUND/AIM: Brucella endocarditis, which is a rare condition, is the most common cause of death in human brucellosis, leading to severe cardiac complications. By collecting and analyzing clinical cases, we analyzed the clinical characteristics and outcome of Brucella endocarditis in endemic areas in China. MATERIALS AND METHODS: Presented here are 5 cases of Brucella endocarditis, all managed uniformly. We present the clinical, serological, and echocardiographic features; the therapeutic approach; and the follow-up of five patients with Brucella endocarditis...
December 20, 2016: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28079834/intestinal-brucellosis-associated-with-celiac-artery-and-superior-mesenteric-artery-stenosis-and-with-ileum-mucosa-and-submucosa-thickening-a-case-report
#3
Miaoqian Wang, Qingli Zhu, Qian Yang, Wenbo Li, Xinning Wang, Wei Liu, Baotong Zhou, Zhenghong Li, Hong Yang
RATIONALE: Brucellosis is a multisystem infection found worldwide that has a broad range of characteristics, which range from acute fever and hepatomegaly to chronic infections that most commonly affect the central nervous system, cardiovascular system, or skeletal system. Gastrointestinal and splanchnic artery involvements in brucellosis are relatively uncommon. PATIENT CONCERNS: We report a case of brucellosis in an adolescent presenting as intermittent abdominal pain, diarrhea, and fever, with intestinal tract involvement...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28077743/seroepidemiology-of-human-brucellosis-among-blood-donors-in-southern-ethiopia-calling-attention-to-a-neglected-zoonotic-disease
#4
Bereket Workalemahu, Tsegaye Sewunet, Ayalew Astatkie
Human brucellosis is neglected in southern Ethiopia. Although traditional food processing practices and animal husbandry which increase the risk of brucellosis are common, it has not been properly studied yet. This study was conducted to determine the seroepidemiology of brucellosis among apparently healthy individuals in southern Ethiopia. In the study, blood samples were collected to screen for serum agglutinins reactive to stained antigen of Brucella abortus Standard tube titration was performed for reactive serum to determine the titer of the agglutinin...
January 11, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28070255/evaluation-of-different-primers-for-detection-of-brucella-by-using-pcr-method
#5
Zahra Moulana, Mohammad Reza Hasanjani Roushan, Seyed Mahmoud Amin Marashi
INTRODUCTION: Brucellosis is a worldwide zoonosis and a significant cause of loss of health in humans and animals. Traditionally, classic diagnosis is carried out by isolation of Brucella, which is time-consuming, technically challenging and potentially dangerous. The aim of this study was to expand a molecular test that would be used for the develop detection of Brucella in a single reaction with high sensitivity and specificity, by targeting IS711element. METHODS: This study was carried out from 2015 to 2016 at the Ayatolla Rohani hospital in Babol, Iran...
November 2016: Electronic Physician
https://www.readbyqxmd.com/read/28069819/temporal-role-for-myd88-in-a-model-of-brucella-induced-arthritis-and-musculoskeletal-inflammation
#6
Carolyn A Lacey, William J Mitchell, Charles R Brown, Jerod A Skyberg
Brucella spp. are facultative intracellular Gram-negative bacteria that cause the zoonotic disease brucellosis, one of the most common global zoonoses. Osteomyelitis, arthritis and musculoskeletal inflammation are common focal complications of brucellosis in humans; however, wild-type (WT) mice infected systemically with conventional doses of Brucella do not develop these complications. Here we report WT C57BL/6 mice infected via the footpad with 10(3)-10(6) CFUs of Brucella spp. display neutrophil and monocyte infiltration to the joint space and surrounding musculoskeletal tissue...
January 9, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28068003/brucella-abortus-is-prevalent-in-both-humans-and-animals-in-bangladesh
#7
A K M A Rahman, C Saegerman, D Berkvens, F Melzer, H Neubauer, D Fretin, E Abatih, N Dhand, M P Ward
To determine the role of different Brucella (B.) spp. in Bangladesh, 62 animal samples and 500 human sera were tested. Animal samples from cattle, goats and sheep (including milk, bull semen, vaginal swabs and placentas) were cultured for Brucella spp. Three test-positive human sera and all animal samples were screened by Brucella genus-specific real-time PCR (RT-PCR), and positive samples were then tested by IS711 RT-PCR to detect B. abortus and B. melitensis DNA. Only B. abortus DNA was amplified from 13 human and six animal samples...
January 9, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28061345/bioaugmentation-as-a-strategy-for-the-remediation-of-pesticide-polluted-soil-a-review
#8
REVIEW
Mariusz Cycoń, Agnieszka Mrozik, Zofia Piotrowska-Seget
Bioaugmentation, a green technology, is defined as the improvement of the degradative capacity of contaminated areas by introducing specific microorganisms, has emerged as the most advantageous method for cleaning-up soil contaminated with pesticides. The present review discusses the selection of pesticide-utilising microorganisms from various sources, their potential for the degradation of pesticides from different chemical classes in liquid media as well as soil-related case studies in a laboratory, a greenhouse and field conditions...
December 26, 2016: Chemosphere
https://www.readbyqxmd.com/read/28053214/the-bactec-fx-blood-culture-system-detects-brucella-melitensis-bacteremia-in-adult-patients-within-the-routine-one-week-incubation-period
#9
Moshe Sagi, Lior Nesher, Pablo Yagupsky
The performance of the BACTEC FX blood culture system for detecting Brucella bacteremia within the routine one-week incubation period was assessed in a prospective study conducted in an endemic area for B. melitensis in southern Israel. Aerobic vials (BD BACTEC™ Plus Aerobic/F Medium) inoculated with blood specimens obtained from adult patients with a positive Rose-Bengal screening test were monitored for four consecutive weeks and blind subcultures of negative vials were performed on solid media on days 7 and 28...
January 4, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28046078/immune-response-in-calves-vaccinated-with-type-three-secretion-system-antigens-and-shiga-toxin-2b-subunit-of-escherichia-coli-o157-h7
#10
Luisina Martorelli, Sergio Garbaccio, Daniel A Vilte, Adriana A Albanese, María P Mejías, Marina S Palermo, Elsa C Mercado, Cristina E Ibarra, Angel A Cataldi
Ruminants are the primary reservoir of Shiga-toxin producing Escherichia coli (STEC) O157:H7 and the main source of infection for humans. The aim of this study was to assess the immunogenic properties of a candidate vaccine consisting on the recombinant proteins of E. coli O157:H7 IntiminC280, the carboxy-terminal fraction of Intimin γ, EspB and the fusion protein between the B subunit of Stx2 and Brucella Lumazine Synthase (BLS)(BLS-Stx2B), in Holstein Fresian calves.To accomplish this goal we vaccinated calves with two doses of different vaccine formulations: 2 antigens (IntiminC280, EspB), 3 antigens (IntiminC280, EspB, BLS-Stx2B), BLS-Stx2B alone and a control non-vaccinated group...
2017: PloS One
https://www.readbyqxmd.com/read/28040240/brucella-spondylodiscitis
#11
Recep Sade, Gökhan Polat, Hayri Ogul, Mecit Kantarci
No abstract text is available yet for this article.
December 28, 2016: Medicina Clínica
https://www.readbyqxmd.com/read/28034636/detection-of-fusobacterium-nucleatum-in-two-cases-of-empyema-and-lung-abscess-using-paromomycin-vancomycin-supplemented-brucella-hk-agar
#12
Kentaro Nagaoka, Katsunori Yanagihara, Yoshitomo Morinaga, Shigeru Kohno
Fusobacterium nucleatum was found in patients with empyema or pulmonary abscess, using paromomycin-vancomycin Brucella HK agar. In vitro examination revealed that growth of the strains differed significantly in different media. Clinicians should be aware that suboptimal F. nucleatum cultivation methods may result in an underestimation of its frequency.
December 26, 2016: Anaerobe
https://www.readbyqxmd.com/read/28032696/high-incidence-of-respiratory-involvement-in-a-cluster-of-brucella-suis-infected-workers-from-a-pork-processing-plant-in-argentina
#13
J C Wallach, J L García, P S Cardinali, A P Seijo, A G Benchetrit, S E Echazarreta, S L Garro, B Deodato, P C Baldi
Epidemiological and clinical aspects of Brucella suis infection in 17 workers from a pork processing plant in Argentina occurring between January 2014 and July 2015 are presented. All patients reported working 9 h daily without adequate personal protection garment. Blood cultures were positive for Brucella spp. in 14 of the 17 patients (82.3%). All isolates were identified as B. suis biovar 1. Although fever, sweats, asthenia, myalgia and hepatic involvement were the most frequent clinical manifestations, an unusually high incidence of respiratory involvement was found...
December 29, 2016: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28029188/a-novel-isolation-protocol-and-probe-based-rt-pcr-for-diagnosis-of-gastric-infections-with-the-zoonotic-pathogen-helicobacter-suis
#14
Caroline Blaecher, Eva Bauwens, Alfred Tay, Fanny Peters, Sylvia Dobbs, John Dobbs, André Charlett, Richard Ducatelle, Freddy Haesebrouck, Annemieke Smet
BACKGROUND: Helicobacter suis is a very fastidious microorganism associated with gastritis, gastric ulcers, and mucosa-associated lymphoid tissue lymphoma in humans. In vitro isolation of this agent from human patients has so far been unsuccessful. MATERIALS AND METHODS: A probe-based real-time PCR (RT-PCR) for the rapid detection of H. suis in gastric biopsies was developed. Secondly, a mouse-passage-based protocol was optimized for isolation of low numbers of viable H...
December 28, 2016: Helicobacter
https://www.readbyqxmd.com/read/28018318/cox-2-inhibition-reduces-brucella-bacterial-burden-in-draining-lymph-nodes
#15
Aurélie Gagnaire, Laurent Gorvel, Alexia Papadopoulos, Kristine Von Bargen, Jean-Louis Mège, Jean-Pierre Gorvel
Brucella is a Gram-negative facultative intracellular bacterium responsible for a chronic disease known as brucellosis, the most widespread re-emerging zoonosis worldwide. Establishment of a Th1-mediated immune response characterized by the production of IL-12 and IFNγ is essential to control the disease. Leukotrienes derived from arachidonic acid (AA) metabolism are known to negatively regulate a protective Th1 immune response against bacterial infections. Here, using genomics approaches we demonstrate that Brucella abortus strongly stimulates the prostaglandin (PG) pathway in dendritic cells (DC)...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28017899/nocodazole-treatment-interrupted-brucella-abortus-invasion-in-raw-264-7-cells-and-successfully-attenuated-splenic-proliferation-with-enhanced-inflammatory-response-in-mice
#16
Alisha Wehdnesday Bernardo Reyes, Huynh Tan Hop, Lauren Togonon Arayan, Tran Xuan Ngoc Huy, Wongi Min, Hu Jang Lee, Hong Hee Chang, Suk Kim
Brucellosis is one of the most important and widespread zoonosis worldwide responsible for serious economic losses and considerable public health burden. In this study, we investigated the modulatory effect of a microtubule-inhibitor, nocodazole, on B. abortus infection in murine macrophages and in a mouse model. Nocodazole activated macrophages and directly inhibited the growth of Brucella in a dose-dependent manner. Nocodazole increased adhesion but reduced invasion and intracellular growth of Brucella in macrophages although it did not affect co-localization of Brucella with LAMP-1...
December 23, 2016: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28012988/the-host-immune-enhancing-agent-korean-red-ginseng-oil-successfully-attenuates-brucella-abortus-infection-in-a-murine-model
#17
Alisha Wehdnesday Bernardo Reyes, Huynh Tan Hop, Lauren Togonon Arayan, Tran Xuan Ngoc Huy, Soo Jong Park, Kwang Dong Kim, WonGi Min, Hu Jang Lee, Man Hee Rhee, Yi-Seong Kwak, Suk Kim
ETHNOPHARMACOLOGICAL RELEVANCE: Panax ginseng Meyer (Araliaceae), is one of the most valuable traditional Chinese medicines and is used for the treatment of various human diseases. In this study, we elucidated the protective mechanism of the essential oil from Korean red ginseng (RGO) against Brucella infection. MATERIALS AND METHODS: The effects of RGO on Brucella abortus viability, NO production, uptake and intracellular growth in macrophages were investigated...
December 21, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27994321/comparison-of-the-antimicrobial-activity-of-direct-pulp-capping-materials-mineral-trioxide-aggregate-angelus-and-biodentine
#18
Taha Özyürek, Ebru Özsezer Demiryürek
PURPOSE: To compare the antimicrobial activity of the tricalcium silicate-based Biodentine (BD) and mineral trioxide aggregate (MTA)-Angelus cement with the aid of agar diffusion test. MATERIALS AND METHODS: Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, and Enterococcus faecium were inoculated in the Brucella liquid medium and were incubated at 37°C for 24 h. Thereafter, 100 >μl of the liquid culture of bacteria inoculated in the Mueller-Hinton agar with spread plate technique...
November 2016: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/27994212/intracellular-trafficking-modulation-by-ginsenoside-rg3-inhibits-brucella-abortus-uptake-and-intracellular-survival-within-raw-264-7-cells
#19
Tran Xuan Ngoc Huy, Alisha Wehdnesday Bernardo Reyes, Huynh Tan Hop, Lauren Togonon Arayan, WonGi Min, Hu Jang Lee, Man Hee Rhee, Hong Hee Chang, Suk Kim
Ginsenoside Rg3, a saponin extracted from Ginseng, has various pharmacological and biological activities, however its effects against Brucella infection are still unclear. Herein, the inhibitory effects of ginsenoside Rg3 against intracellular parasitic Brucella infection were evaluated through bacterial infection, adherence assays, and LAMP-1 colocalization, as well as immunoblotting and FACS for detecting MAPKs signaling proteins and F-actin polymerization, respectively. The internalization, intracellular growth and adherence of Brucella (B...
December 20, 2016: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27994018/a-conserved-abc-transport-system-regulated-by-the-general-stress-response-pathways-of-alpha-and-gammaproteobacteria
#20
Julien Herrou, Jonathan W Willett, Daniel M Czyż, Gyorgy Babnigg, Youngchang Kim, Sean Crosson
: Brucella abortus σ(E1) is an EcfG-family sigma factor that regulates transcription of dozens of genes in response to diverse stress conditions, and is required for maintenance of chronic infection in a mouse model. A putative ATP-binding cassette transporter operon, bab1_0223-bab1_0226, is among the most highly activated gene sets in the σ(E1) regulon. The proteins encoded by this operon resemble quaternary ammonium compatible solute importers, but are most similar in sequence to the broadly conserved YehZYXW system, which remains largely uncharacterized...
December 19, 2016: Journal of Bacteriology
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