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Alicia Montaner Ramón, Laura Murillo Sanjuán, Cristina Martínez Faci, Carmelo Guerrero Laleona, Carmen Rodríguez-Vigil Iturrate
Chronic granulomatous disease (CGD) is a primary immunodeficiency with an incidence of 1/200,000-250,000 live births. CGD affects mainly male patients, most of the mutations being X-linked, and autosomal recessive forms occur more frequently in communities with greater numbers of consanguineous marriages. CGD is characterized by sensitivity to recurrent and severe bacterial and fungal infections, with formation of granulomas due to the inability of phagocytes to generate reactive oxygen compounds, necessary for the intracellular death of phagocytic microorganisms...
April 1, 2017: Archivos Argentinos de Pediatría
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
Solimar G Machado, François Baglinière, Sophie Marchand, Els Van Coillie, Maria C D Vanetti, Jan De Block, Marc Heyndrickx
Raw bovine milk is highly nutritious as well as pH-neutral, providing the ideal conditions for microbial growth. The microbiota of raw milk is diverse and originates from several sources of contamination including the external udder surface, milking equipment, air, water, feed, grass, feces, and soil. Many bacterial and fungal species can be found in raw milk. The autochthonous microbiota of raw milk immediately after milking generally comprises lactic acid bacteria such as Lactococcus, Lactobacillus, Streptococcus, and Leuconostoc species, which are technologically important for the dairy industry, although they do occasionally cause spoilage of dairy products...
2017: Frontiers in Microbiology
Ramesh Venkatesh, Manisha Agarwal, Shalini Singh, Rahul Mayor, Aditya Bansal
We describe a rare case of scleral buckle (SB) infection with Serratia species. A 48-year-old male with a history of retinal detachment repair with scleral buckling presented with redness, pain, and purulent discharge in the left eye for 4 days. Conjunctival erosion with exposure of the SB and scleral thinning was noted. The SB was removed and sent for culture. Blood and chocolate agar grew Gram-negative rod-shaped bacillus identified as Serratia marcescens. On the basis of the susceptibility test results, the patient was treated with oral and topical antibiotics...
January 2017: Oman Journal of Ophthalmology
Anastasie Nicole Alima Yanda, Jobert Richie N Nansseu, Hubert Désiré Mbassi Awa, Sandra A Tatah, Judith Seungue, Charlotte Eposse, Paul Olivier N Koki
BACKGROUND: Although sickle cell disease (SCD) children are highly susceptible to bacterial infections (BIs), there is a dreadful lack of data related to the burden and spectrum of BIs in sub-Saharan Africa (SSA), the highest affected region with SCD. This study aimed to determine the burden and spectrum of BIs among SCD children hospitalized in a pediatric reference hospital in Cameroon, a SSA country. METHODS: We conducted a retrospective analysis of records of children hospitalized from November 2012 to August 2015 in the SCD unit of the Mother and Child Centre of the Chantal Biya Foundation, Cameroon...
March 15, 2017: BMC Infectious Diseases
Joseph D Madison, Elizabeth A Berg, Juan G Abarca, Steven M Whitfield, Oxana Gorbatenko, Adrian Pinto, Jacob L Kerby
Global amphibian declines and extinction events are occurring at an unprecedented rate. While several factors are responsible for declines and extinction, the fungal pathogen Batrachochytrium dendrobatidis (Bd) has been cited as a major constituent in these events. While the effects of this chytrid fungus have been shown to cause broad scale population declines and extinctions, certain individuals and relict populations have shown resistance. This resistance has been attributed in part to the cutaneous bacterial microbiome...
2017: Frontiers in Microbiology
Gaston Courtade, Simone Balzer Le, Gerd Inger Sætrom, Trygve Brautaset, Finn L Aachmann
Lytic polysaccharide monooxygenases (LPMOs) are key enzymatic players of lignocellulosic biomass degradation processes. As such, they have been introduced in cellulolytic cocktails for more efficient and less expensive lignocellulose saccharification. The recombinant production of LPMOs in bacteria for scientific investigations using vectors typically based on the T7 and lacUV5 promoters has been hampered by low yields. Reasons for this have been catabolite repression when producing the proteins in defined media with glucose as the sole carbon source, as well as the lack of an inducible expression system that allows controlled production of LPMOs that are correctly processed during translocation to the periplasmic space...
February 14, 2017: Carbohydrate Research
Shariza B Jamek, Christian Nyffenegger, Jan Muschiol, Jesper Holck, Anne S Meyer, Jørn D Mikkelsen
Type A chitinases (EC, GH family 18, attack chitin ((1 → 4)-2-acetamido-2-deoxy-β-D-glucan) and chito-oligosaccharides from the reducing end to catalyze release of chitobiose (N,N'-diacetylchitobiose) via hydrolytic cleavage of N-acetyl-β-D-glucosaminide (1 → 4)-β-linkages and are thus "exo-chitobiose hydrolases." In this study, the chitinase type A from Serratia marcescens (SmaChiA) was used as a template for identifying two novel exo-chitobiose hydrolase type A enzymes, FbalChi18A and MvarChi18A, originating from the marine organisms Ferrimonas balearica and Microbulbifer variabilis, respectively...
March 9, 2017: Applied Microbiology and Biotechnology
Daniil Azarov, Artemiy Goncharov, Alena Karaseva, Tatyana Brodina, Ekaterina Lebedeva, Irina Taranenko, Anna Feting, Michael Bakaev, Elena Brusina, Lyudmila Zueva
Serratia marcescens is a frequent cause of health care-associated infections and has led to multiple outbreaks. Here, we report the draft genome of a multidrug-resistant S. marcescens strain 189 which was isolated in 2012 as a predominant clone in a neonatal hospital in Kemerovo.
March 9, 2017: Genome Announcements
Ladislao Díaz-Vergara, Carina Maricel Pereyra, Mariana Montenegro, Gabriela Alejandra Pena, Carla Ayelen Aminahuel, Lilia R Cavaglieri
Whey is the main byproduct of the cheese industry. While the composition is variable, it retains up to 55% of milk nutrients. The beneficial features of whey indicates a promising source of new potentially probiotic strains for the development of food additives destined for animal production. The aim of this study was to identify Kluyveromyces spp. isolated from whey, to study some probiotic properties and to select the best strain to be encapsulated using derivatised chitosan. Kluyveromyces marxianus strains (VM003, VM004 and VM005) were isolated from whey and identified by phenotypic and molecular techniques...
March 6, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
B Umamaheswari, K Priya, Rama Rajaram
Synthetic fatliquors are useful as a fatliquoring agent, flotation agent and emulsifying agent in a wide range of industrial applications such as leather, pharmacy and farm chemicals. These fatliquors remain recalcitrant to natural biota in existing treatment plants. In the present study, the isolated microaerophilic Serratia sp. HA1 strain CSMB3 is capable of utilizing structurally different fatliquors as the sole substrate for their growth under microaerobic conditions. Degradation of vegetable fatliquors was observed from 95 to 97% in terms of lipids, with the production of lipase at 72 h...
March 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Ki Ho Park, Yong Pil Chong, Sung Han Kim, Sang Oh Lee, Mi Suk Lee, Heungsup Sung, Mi Na Kim, Yang Soo Kim, Jun Hee Woo, Sang Ho Choi
We evaluated the impact of revised Clinical and Laboratory Standards Institute (CLSI) breakpoints for broad-spectrum cephalosporins (BSCs) on the susceptibilities of 1,742 isolates of Enterobacter species, Serratia marcescens, Citrobacter freundii, and Morganella morganii. The 2011 CLSI criteria for cefotaxime and ceftazidime reduced the rates of susceptibility by 2.9% and 5.9%, respectively. The 2014 CLSI criteria for cefepime reduced the rate of susceptibility by 13.9%, and categorized 11.8% isolates as susceptible-dose dependent (SDD) for cefepime...
February 28, 2017: Infection & Chemotherapy
Robert M Q Shanks, Nicholas A Stella, Roni M Lahr, Marissa A Aston, Kimberly M Brothers, Jake D Callaghan, Cihad Sigindere, Xinyu Liu
The EepR transcription factor positively regulates secondary metabolites and tissue-damaging metalloproteases. To gain insight into mechanisms by which EepR regulates pigment and co-regulated factors, genetic suppressor analysis was performed. Suppressor mutations that restored pigment to the non-pigmented ∆eepR mutant mapped to the hexS ORF. Mutation of hexS also restored haemolysis, swarming motility and protease production to the eepR mutant. HexS is a known direct and negative regulator of secondary metabolites in Serratia marcescens and is a LysR family regulator and an orthologue of LrhA...
February 2017: Microbiology
Shaozhen Xing, Taping Ma, Xianglilan Zhang, Yong Huang, Zhiqiang Mi, Qiang Sun, Xiaoping An, Hang Fan, Shuhui Wu, Lin Wei, Yigang Tong
A Serratia rubidaea phage, vB_Sru IME250, was isolated from hospital sewage. The morphology suggested that phage vB_Sru IME250 should be classified as a member of the family Myoviridae. High-throughput sequencing revealed that the phage genome has 154,938 nucleotides and consists of 193 coding DNA sequences, 90 of which have putative functions. The genome of vB_Sru IME250 is a linear, double-stranded DNA with an average GC content of 40.04%. The phage has a relatively high similarity to Klebsiella phage 0507-KN2-1, with a genome coverage of 84%...
March 6, 2017: Archives of Virology
John Osei Sekyere, Daniel G Amoako
Background: Carbapenems (CAR), colistin (CST), and tigecycline (TGC) alone or in combination therapy has become the last-resort antibiotics for treating infections caused by multidrug resistant (MDR) bacteria. However, resistance to these reserve antibiotics are increasingly being reported worldwide. Hence, the quest to find other agents that will synergistically restore the efficacy of these antibiotics have increased. Methods: Sixty-three clinical Enterobacteriaceae isolates comprising of Klebsiella pneumoniae (n = 24), Enterobacter spp...
2017: Frontiers in Microbiology
Abir Nachar, Hoda M Eid, Melinda Vinqvist-Tymchuk, Tri Vuong, Wilhelmina Kalt, Chantal Matar, Pierre S Haddad
BACKGROUND: We recently reported that blueberry juice fermented (FJ) with Serratia vaccinii bacterium has antidiabetic activities both in vivo and in vitro. The purpose of this project was to elucidate the effect of FJ on glucose homeostasis in liver and skeletal muscle cells and to identify active fractions/compounds responsible for this effect. METHODS: FJ was fractionated using standard chromatography procedures. Hepatic (H4IIE, HepG2) and skeletal muscle cells (C2C12) were treated with maximum non-toxic concentrations of FJ, fractions and isolated compounds thereof...
March 4, 2017: BMC Complementary and Alternative Medicine
Fan Zhang, Qiaoe Wei, Huan Tong, Dongqing Xu, Weiwu Wang, Tingting Ran
Prodigiosin, a tripyrrole red pigment is synthesized by Serratia and some other microbes through a bifurcated biosynthesis pathway; MBC (4-methoxy-2,2'-bipyrrole-5-carbaldehyde) and MAP (2-methyl-3-n-amyl-pyrrole) are synthesized separately and then condensed by PigC to form prodigiosin. PigI, PigG and PigA have been shown to be involved in the first steps of MBC biosynthesis (proline incorporation). The crystal structure of PigG was resolved to elucidate its function and mechanism. PigG, an acyl carrier protein (ACP), features the ACP architecture:, a helical bundle fold containing three major helices and a minor distorted helix together with a conserved "S" motif...
March 1, 2017: International Journal of Biological Macromolecules
Kenneth V I Rolston, Mohamed A Jamal, Lior Nesher, Samuel A Shelburne, Issam Raad, Randall A Prince
Bacterial infections are common in cancer patients. Ceftaroline (CFT) is a broad-spectrum cephalosporin with activity against most Gram-positive organisms (GPOs) and many Gram-negative organisms. In this study, the in vitro activity of CFT was compared with vancomycin (VAN), daptomycin (DAP), linezolid (LZD), trimethoprim/sulphamethoxazole (SXT) and tigecycline (TIG) against bacteria (predominantly blood culture isolates) isolated from cancer patients in 2014 and 2015. CFT was active against methicillin-susceptible Staphylococcus aureus (MSSA), methicillin-resistant S...
February 28, 2017: International Journal of Antimicrobial Agents
Miguel A Matilla, Zulema Udaondo, Tino Krell, George P C Salmond
Serratia marcescens MSU97 was isolated from the Guayana region of Venezuela due to its ability to suppress plant-pathogenic oomycetes. Here, we report the genome sequence of MSU97, which produces various antibiotics, including the bacterial acetyl-coenzyme A (acetyl-CoA) carboxylase inhibitor andrimid, the chlorinated macrolide oocydin A, and the red linear tripyrrole antibiotic prodigiosin.
March 2, 2017: Genome Announcements
Graziano Pizzolante, Chiara Cordero, Salvatore M Tredici, Davide Vergara, Paola Pontieri, Luigi Del Giudice, Andrea Capuzzo, Patrizia Rubiolo, Chidananda N Kanchiswamy, Simon A Zebelo, Carlo Bicchi, Massimo E Maffei, Pietro Alifano
BACKGROUND: A chemical cross-talk between plants and insects is required in order to achieve a successful co-adaptation. In response to herbivory, plants produce specific compounds, and feeding insects respond adequately7 to molecules produced by plants. Here we show the role of the gut microbial community of the mint beetle Chrysolina herbacea in the chemical cross-talk with Mentha aquatica (or watermint). RESULTS: By using two-dimensional gas chromatography-mass spectrometry we first evaluated the chemical patterns of both M...
March 2, 2017: BMC Plant Biology
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