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https://www.readbyqxmd.com/read/28317807/tetrahydro-2-furanyl-2-4-1h-3h-pyrimidinedione-derivatives-as-novel-antibacterial-compounds-against-mycobacterium
#1
Yuji Koseki, Hironori Kanetaka, Joji Tsunosaki, Héléne Munier-Lehmann, Shunsuke Aoki
OBJECTIVE/BACKGROUND: Mycobacterium tuberculosis thymidine monophosphate kinase (mtTMPK) is a potential enzymatic target for the treatment of tuberculosis (TB). MATERIALS AND METHODS: In this study, we performed pharmacophore-based in silico screening, targeting mtTMPK with a compound library of 461,383 chemicals. We evaluated the candidate compounds for inhibitory effects on the growth of the model mycobacteria, Mycobacterium smegmatis. RESULTS: The compound KTP3 completely inhibited the growth of M...
January 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28314783/umbilical-infections-in-foals-microbiological-investigation-and-management
#2
E Rampacci, F Passamonti, M Bottinelli, V Stefanetti, M Cercone, S Nannarone, R Gialletti, F Beccati, M Coletti, M Pepe
This study aims to investigate the bacteria involved in equine omphalitis and their susceptibility to antimicrobial drugs, and consequently to provide guidelines concerning the most suitable treatment protocol in accordance with the clinical, ultrasound and laboratory findings. Forty foals aged between one and 30 days were evaluated in the course of this investigation. An ultrasound examination of all umbilical remnants was carried out carefully in all foals; umbilical swabs were collected for bacteriological examination, and blood samples were collected for blood culture from 19 foals with fever and abnormal blood values...
March 17, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28282893/the-novel-property-of-heptapeptide-of-microcin-c7-in-affecting-the-cell-growth-of-escherichia-coli
#3
Rensen Ran, Huan Zeng, Dong Zhao, Ruiyuan Liu, Xia Xu
Microcin C7 (McC), widely distributed in enterobacteria, is a promising antibiotic against antibiotic resistance [...].
March 8, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28278106/interactive-effect-of-trivalent-iron-on-activated-sludge-digestion-and-biofilm-structure-in-attached-growth-reactor-of-waste-tyre-rubber
#4
Iqra Sharafat, Dania Khalid Saeed, Sumera Yasmin, Asma Imran, Zargona Zafar, Abdul Hameed, Naeem Ali
Waste tyre rubber (WTR) has been introduced as an alternative, novel media for biofilm development in several experimental systems including attached growth bioreactors. In this context, four laboratory scale static batch bioreactors containing WTR as a support material for biofilm development were run under anoxic condition for 90 days using waste activated sludge as an inoculum under the influence of different concentrations (2.5, 6.5, 8.5 mg/l) of trivalent ferric iron (Fe(3+)). The data revealed that activated sludge W with a Fe(3+) concentration of 8...
February 16, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28252809/activation-of-leuo-by-lrha-in-escherichia-coli
#5
Hannes Breddermann, Karin Schnetz
LeuO is a conserved LysR-type transcription factor of pleiotropic function in Enterobacteria. Regulation of the leuO gene has been best studied in Escherichia coli and Salmonella enterica. Its expression is silenced by the nucleoid-associated proteins H-NS and StpA, autoregulated by LeuO, and in E. coli activated by the transcription regulator BglJ-RcsB. However, signals which induce leuO expression remain unknown. Here we show that LrhA, a conserved LysR-type transcription regulator, activates leuO in E. coli...
March 2, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28249816/anti-inflammatory-and-antioxidant-effects-of-polyphenols-extracted-from-antirhea-borbonica-medicinal-plant-on-adipocytes-exposed-to-porphyromonas-gingivalis-and-escherichia-coli-lipopolysaccharides
#6
Fanny Le Sage, Olivier Meilhac, Marie-Paule Gonthier
In obesity, gut microbiota LPS may translocate into the blood stream and then contribute to adipose tissue inflammation and oxidative stress, leading to insulin resistance. A causal link between periodontal infection, obesity and type 2 diabetes has also been suggested. We evaluated the ability of polyphenols from Antirhea borbonica medicinal plant to improve the inflammatory and redox status of 3T3-L1 adipocytes exposed to LPS of Porphyromonas gingivalis periodontopathogen or Escherichia coli enterobacteria...
February 27, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28231152/antimicrobial-active-packaging-including-chitosan-films-with-thymus-vulgaris-l-essential-oil-for-ready-to-eat-meat
#7
Jesús Quesada, Esther Sendra, Casilda Navarro, Estrella Sayas-Barberá
An active packaging system has been designed for the shelf life extension of ready to eat meat products. The package included an inner surface coated with a chitosan film with thyme essential oil (0%, 0.5%, 1%, and 2%) not in direct contact with the meat. Our aim was to reduce the impact of thyme essential oil (EO) on meat sensory properties by using a chemotype with low odor intensity. The pH, color parameters, microbial populations, and sensory properties were assessed during 4 weeks of refrigerated storage...
August 29, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28228071/a-rat-model-of-ischemic-enteritis-pathogenic-importance-of-enterobacteria-inos-no-and-cox-2-pge2
#8
Koji Takeuchi, Yoshino Komatsu, Yuka Nakamori, Tohru Kotani
BACKGROUND: We introduced a rat model of ischemic enteritis and investigated the roles of enterobacteria, nitric oxide (NO), and prostaglandins (PGs) in its pathogenesis. METHODS: Male rats were used after 18 h of fasting. Ischemic enteritis was induced by partial ligation of the superior mesenteric artery (SMA). Under ether anesthesia, SMA was isolated, and a stenosis was made by placing a needle (23 guage) on the vessel and ligating both the vessel and needle, and then a needle was removed from the ligature...
February 20, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28216438/porphyromonas-gingivalis-lipopolysaccharide-induces-pro-inflammatory-adipokine-secretion-and-oxidative-stress-by-regulating-toll-like-receptor-mediated-signaling-pathways-and-redox-enzymes-in-adipocytes
#9
Fanny Le Sage, Olivier Meilhac, Marie-Paule Gonthier
Gut microbiota LPS contributes to obesity-related chronic inflammation and oxidative stress, promoting insulin resistance. Periodontal disease also represents a risk factor for type 2 diabetes and is associated with obesity. This study compared the effect of LPS from P. gingivalis periodontopathogen and E. coli enterobacteria on inflammatory adipokine secretion and redox status of 3T3-L1 adipocytes. We found that both LPS activated TLR2- and TLR4-mediated signaling pathways involving MyD88 adaptor and NFκB transcription factor, leading to an increased secretion of leptin, resistin, IL-6 and MCP-1...
February 20, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28207310/microbiological-quality-and-prevalence-of-%C3%AE-lactam-antibiotic-resistance-genes-in-oysters-crassostrea-rhizophorae
#10
Maria Aparecida da RessurreiÇão Brandão, Amanda Teixeira Sampaio Lopes, Maria Tereza da Silva Neta, Rhyan Barros Farias de Oliveira, Rachel Passos Rezende, George Rêgo Albuquerque, Verônica Dias Gonçalves, Dália Dos Prazeres Rodrigues, Guisla Boehs, Bianca Mendes Maciel
The microbiological quality of oysters reflects the microbiological quality of their habitats because they are filter feeders. The objective of this study was to assess the bacterial composition of the edible oyster Crassostrea rhizophorae in urban and preserved estuaries. Particularly, we assessed the presence of pathogenic bacteria, investigated antibiotic susceptibility in bacterial isolates, and quantified β-lactam antibiotic resistance genes (blaTEM, blaSHV, and blaKPC) via quantitative PCR of oyster DNA...
March 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28193415/changes-of-sodium-nitrate-nitrite-and-n-nitrosodiethylamine-during-in-vitro-human-digestion
#11
Hyeong Sang Kim, Sun Jin Hur
This study aimed to determine the changes in sodium nitrate, sodium nitrite, and N-nitrosodiethylamine (NDEA) during in vitro human digestion, and the effect of enterobacteria on the changes in these compounds. The concentrations of nitrate, nitrite, and NDEA were significantly reduced from 150, 150, and 1ppm to 42.8, 63.2, and 0.85ppm, respectively, during in vitro human digestion (p<0.05). The enterobacteria Escherichia coli and Lactobacillus casei reduced the amount of these compounds present during in vitro human digestion...
June 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28174560/things-are-getting-hairy-enterobacteria-bacteriophage-vb_pcam_cbb
#12
Colin Buttimer, Hanne Hendrix, Hugo Oliveira, Aidan Casey, Horst Neve, Olivia McAuliffe, R Paul Ross, Colin Hill, Jean-Paul Noben, Jim O'Mahony, Rob Lavigne, Aidan Coffey
Enterobacteria phage vB_PcaM_CBB is a "jumbo" phage belonging to the family Myoviridae. It possesses highly atypical whisker-like structures along the length of its contractile tail. It has a broad host range with the capability of infecting species of the genera Erwinia, Pectobacterium, and Cronobacter. With a genome of 355,922 bp, excluding a predicted terminal repeat of 22,456 bp, phage CBB is the third largest phage sequenced to date. Its genome was predicted to encode 554 ORFs with 33 tRNAs. Based on prediction and proteome analysis of the virions, 29% of its predicted ORFs could be functionally assigned...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28158310/retrospective-and-prospective-evaluation-of-the-carbapenem-inactivation-method-for-the-detection-of-carbapenemase-producing-enterobacteriaceae
#13
Lauraine Gauthier, Remy A Bonnin, Laurent Dortet, Thierry Naas
BACKGROUND: There is an urgent need for accurate and rapid diagnostic tests to identify carbapenemase producing enterobacteria (CPE). Here, we have evaluated the Carbapenem Inactivation Method (CIM) test to detect CPEs from cultured colonies. METHODS: A total of 256 enterobacterial isolates were used to evaluate the performance of the CIM in comparison to Carba NP test and molecular detection used a reference method. Ninety three well-characterized isolates (including 29 non-CPE and 63 CPEs of worldwide origin) with decreased susceptibility to at least one carbapenem were used to (i) evaluate the efficacy of CIM test and (ii) to compare it to the Carba NP test...
2017: PloS One
https://www.readbyqxmd.com/read/28111451/effects-of-sodium-diacetate-on-the-fermentation-profile-chemical-composition-and-aerobic-stability-of-alfalfa-silage
#14
XianJun Yuan, AiYou Wen, Seare T Desta, Jian Wang, Tao Shao
Objective: The objective of this study was to evaluate the effect of sodium diacetate (SDA) on fermentation profile, chemical composition and aerobic stability of alfalfa (Medicago sativa L.) silage. Methods: Fresh alfalfa was ensiled with various concentrations of SDA (0, 3, 5, 7 and 9 g/kg of fresh forage). After 60 days of the ensiling, the samples were collected to examine the fermentative quality, chemical composition and aerobic stability. Results: The application of SDA significantly (P<0...
December 26, 2016: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28104282/-incidence-of-bacteria-from-cultures-of-bile-and-gallbladder-wall-of-laparoscopic-cholecystectomy-patients-in-the-university-hospital-dr-jos%C3%A3-eleuterio-gonz%C3%A3-lez
#15
Rubén Cueto-Ramos, Marco Hernández-Guedea, Edelmiro Pérez-Rodríguez, Francisco Reyna-Sepúlveda, Gerardo Muñoz-Maldonado
BACKGROUND: Through experience it has been accepted that bile in normal conditions remains sterile. Bactibilia is a common finding in individuals at high risk or with complicated cholecystolithiasis, however few data prevails about the prevalence of bactibilia in patients operated on for uncomplicated laparoscopic cholecystectomy. There is s common usage of preoperative and postoperative antibiotics in the different patients without the existence of any actual bacteriologic and epidemiologic evidence...
January 16, 2017: Cirugia y Cirujanos
https://www.readbyqxmd.com/read/28040185/fate-of-the-microbial-population-and-the-physico-chemical-parameters-of-sanganel-a-typical-blood-sausages-of-the-friuli-a-north-east-region-of-italy
#16
Lucilla Iacumin, Marisa Manzano, Simone Stella, Giuseppe Comi
In Friuli, a Northeastern region of Italy, a blood sausage called Sanganel is produced by farmers, butchers, shops, and factories. This sausage is made with pork meat, boiled blood, lard, spices, and salt. It is stored at 4 ± 2 °C and usually eaten fresh or boiled within 14 days of its manufacture. Little is known about its microbial populations and safety for consumption. The aim of this study is to characterise the microbial populations and the physico-chemical parameters of Sanganel to establish its quality and the safety of consuming it...
May 2017: Food Microbiology
https://www.readbyqxmd.com/read/28024523/zeolite-food-supplementation-reduces-abundance-of-enterobacteria
#17
Tanka P Prasai, Kerry B Walsh, Surya P Bhattarai, David J Midmore, Thi T H Van, Robert J Moore, Dragana Stanley
According to the World Health Organisation, antibiotics are rapidly losing potency in every country of the world. Poultry are currently perceived as a major source of pathogens and antimicrobial resistance. There is an urgent need for new and natural ways to control pathogens in poultry and humans alike. Porous, cation rich, aluminosilicate minerals, zeolites can be used as a feed additive in poultry rations, demonstrating multiple productivity benefits. Next generation sequencing of the 16S rRNA marker gene was used to phylogenetically characterize the fecal microbiota and thus investigate the ability and dose dependency of zeolite in terms of anti-pathogenic effects...
January 2017: Microbiological Research
https://www.readbyqxmd.com/read/28011950/involvement-of-corticotropin-releasing-factor-and-corticotropin-releasing-factor-2-receptors-in-pathogenesis-of-ischemia-reperfusion-induced-enteritis-in-rats
#18
K Takeuchi, A Kumano, N Abe, T Kotani
We herein investigated, using a corticotropin-releasing factor (CRF) agonist and antagonists, whether CRF plays a role in the pathogenesis of ischemia/reperfusion-induced small intestinal lesions in rats. Under pentobarbital anesthesia, the superior mesenteric artery was clamped (ischemia) for 75 min, followed by reperfusion with removal of the clamp. After a 24-h reperfusion, the area of hemorrhagic lesions that developed in the small intestine was measured. Urocortin I (CRF receptor 1/2 agonist), astressin (CRF receptor 1/2 antagonist), NBI27914 (CRF receptor 1 antagonist), or astressin 2B (CRF receptor 2 antagonist) was administered i...
October 2016: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/27988173/first-survey-on-antibiotic-resistance-markers-in-enterobacteriaceae-in-cochabamba-bolivia
#19
Paola M Saba Villarroel, Gabriel O Gutkind, José A Di Conza, Marcela A Radice
A molecular survey was conducted in Cochabamba, Bolivia, to characterize the mechanism involved in the resistance to clinically relevant antibiotics. Extended Spectrum β-lactamase encoding genes and plasmid-mediated quinolone resistance (PMQR) markers were investigated in a total of 101 oxyimino-cephalosporin-resistant enterobacteria recovered from different health centers during four months (2012-2013). CTX-M enzymes were detected in all isolates, being the CTX-M-1 group the most prevalent (88.1%). The presence of blaOXA-1 was detected in 76...
December 14, 2016: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/27938415/triatomine-bugs-their-microbiota-and-trypanosoma-cruzi-asymmetric-responses-of-bacteria-to-an-infected-blood-meal
#20
Sebastián Díaz, Bianca Villavicencio, Nathália Correia, Jane Costa, Karen L Haag
BACKGROUND: Triatomine bugs (Hemiptera: Reduviidae) are vectors of the flagellate Trypanosoma cruzi, the causative agent of Chagas disease. The study of triatomine gut microbiota has gained relevance in the last years due to its possible role in vector competence and prospective use in control strategies. The objective of this study is to examine changes in the gut microbiota composition of triatomines in response to a T. cruzi-infected blood meal and identifying key factors determining those changes...
December 9, 2016: Parasites & Vectors
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