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Archives of Microbiology

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https://www.readbyqxmd.com/read/28653084/bacillus-alcaliphilum-sp-nov-a-bacterium-isolated-from-a-soda-lake
#1
Vishnuvardhan Reddy Sultanpuram, Thirumala Mothe, Sasikala Chintalapati, Venkata Ramana Chintalapati
Two novel (14B(T) and 7B) Gram-stain-positive, rod-shaped, motile and endospore-forming bacterial strains were isolated from Lonar soda lake, India. Based on 16S rRNA gene sequence analysis, the strains 14B(T) and 7B were identified as belonging to the class Firmibacteria and were most closely related to Bacillus halodurans LMG 7121(T) (99.7 and 99.8%, respectively), Bacillus okuhidensis LMG 22468(T) (99.1 and 99.2%, respectively) and other members in the genus Bacillus (<97.0%). However, the DNA-DNA relatedness studies indicated that the strains 14B(T) and 7B were distantly related to B...
June 26, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28646477/a-double-quadratic-model-for-predicting-vibrio-species-in-water-environments-of-japan
#2
Hidemasa Izumiya, Masato Furukawa, Kikuyo Ogata, Junko Isobe, Setsu Watanabe, Mari Sasaki, Kazuya Ichinose, Eiji Arakawa, Masatomo Morita, Ichiro Kurane, Makoto Ohnishi
Vibrio spp. are natural inhabitants of marine and estuarine environments. Vibrio cholerae, Vibrio parahaemolyticus, and Vibrio vulnificus are the major infectious agents for humans. Their densities are affected by environmental factors such as water temperature and salinity. The detailed contribution of each factor still remains to be elucidated. Here we conducted multi-coastal study in a 21-month period to examine relationships between environmental factors and V. cholerae, V. parahaemolyticus and V. vulnificus densities in sea surface water in eight coastal sites of four prefectures in Japan...
June 23, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28643122/symbiotic-performance-and-induction-of-systemic-resistance-against-cercospora-sojina-in-soybean-plants-co-inoculated-with-bacillus-sp-chep5-and-bradyrhizobium-japonicum-e109
#3
María Laura Tonelli, C Magallanes-Noguera, A Fabra
Soybean is an economically very important crop throughout the word and particularly in Argentina. Soybean yield may be affected by many factors such as the lack of some essential nutrients or pathogens attack. In this work we demonstrated that the co-inoculation of the native biocontrol bacterium Bacillus sp. CHEP5 which induces resistance against Cercospora sojina in soybean and the nitrogen fixing strain Bradyrhizobium japonicum E109, was more effective in reducing frog leaf spot severity than the inoculation of the biocontrol agent alone...
June 22, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28634691/modulation-of-rotavirus-severe-gastroenteritis-by-the-combination-of-probiotics-and-prebiotics
#4
REVIEW
Guadalupe Gonzalez-Ochoa, Lilian K Flores-Mendoza, Ramona Icedo-Garcia, Ricardo Gomez-Flores, Patricia Tamez-Guerra
Annual mortality rates due to infectious diarrhea are about 2.2 million; children are the most vulnerable age group to severe gastroenteritis, representing group A rotaviruses as the main cause of disease. One of the main factors of rotavirus pathogenesis is the NSP4 protein, which has been characterized as a viral toxin involved in triggering several cellular responses leading to diarrhea. Furthermore, the rotavirus protein NSP1 has been associated with interferon production inhibition by inducing the degradation of interferon regulatory factors IRF3, IRF5, and IRF7...
June 20, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28624973/gracilibacillus-aidingensis-sp-nov-a-novel-moderately-halophilic-bacterium-isolated-from-aiding-salt-lake
#5
Tong-Wei Guan, Lei Tian, En-Yuan Li, Shu-Kun Tang, Xiao-Ping Zhang
A novel Gram-positive, aerobe, moderately halophilic bacterium was isolated from saline soil of Aiding lake in Xinjiang, north-west of China, designated strain YIM 98001(T). Cells were rod-shaped, motile and grew at 5-20% (w/v) NaCl (optimum 10%), pH 6-10 (optimum pH 7.0) and 4-45 °C (optimum 37 °C). The major cellular fatty acids were anteiso C15:0, anteiso C17:0, iso C15:0. The predominant respiratory quinone was MK-7. Diphosphatidylglycerol, phosphatidylglycerol, phosphoglycolipid were the major polar lipids...
June 17, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28616631/the-effect-of-emodin-on-staphylococcus-aureus-strains-in-planktonic-form-and-biofilm-formation-in-vitro
#6
Xin Yan, Shanshan Gu, Yunjia Shi, Xingyang Cui, Shanshan Wen, Junwei Ge
Staphylococcus aureus (S. aureus) is a Gram-positive pathogen and forms biofilm easily. Bacteria inside biofilms display an increased resistance to antibiotics and disinfectants. The objective of the current study was to assess the antimicrobial activities of emodin, 1,2,8-trihydroxy-6-methylanthraquinone, an anthraquinone derivative isolated from Polygonum cuspidatum and Rheum palmatum, against S. aureus CMCC26003 grown in planktonic and biofilm cultures in vitro. In addition, a possible synergistic effect between emodin and berberine chloride was evaluated...
June 14, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28601968/characteristics-and-diversity-of-endophytic-bacteria-in-moso-bamboo-phyllostachys-edulis-based-on-16s-rdna-sequencing
#7
Fang Liu, Zongsheng Yuan, Xintao Zhang, Guofang Zhang, Baogui Xie
To understand the diversity and distribution of endophytic bacteria in moso bamboo (Phyllostachys edulis), we used 16S rDNA sequencing to investigate the characteristics and diversity of endophytic bacteria in different moso bamboo tissues. After 454 pyrosequencing, we obtained 141,269 sequences from seven moso bamboo tissue samples. The taxonomic origins of unique sequences were identified using RDP classifier. The results showed that these sequences belonged to 26 bacterial orders, including the Actinomycetales, Rickettsiales, Burkholderiales, Enterobacteriales, and Rhizobiales...
June 10, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28601967/bradyrhizobium-sacchari-sp-nov-a-legume-nodulating-bacterium-isolated-from-sugarcane-roots
#8
Gustavo Feitosa de Matos, Jerri Edson Zilli, Jean Luiz Simões de Araújo, Marcia Maria Parma, Itamar Soares Melo, Viviane Radl, José Ivo Baldani, Luc Felicianus Marie Rouws
Members of the genus Bradyrhizobium are well-known as nitrogen-fixing microsymbionts of a wide variety of leguminous species, but they have also been found in different environments, notably as endophytes in non-legumes such as sugarcane. This study presents a detailed polyphasic characterization of four Bradyrhizobium strains (type strain BR 10280(T)), previously isolated from roots of sugarcane in Brazil. 16S rRNA sequence analysis, multilocus sequence analysis (MLSA) and analysis of the 16S-23S rRNA internal transcribed spacer showed that these strains form a novel clade close to, but different from B...
June 10, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28597303/current-pathogenic-escherichia-coli-foodborne-outbreak-cases-and-therapy-development
#9
REVIEW
Shih-Chun Yang, Chih-Hung Lin, Ibrahim A Aljuffali, Jia-You Fang
Food contamination by pathogenic microorganisms has been a serious public health problem and a cause of huge economic losses worldwide. Foodborne pathogenic Escherichia coli (E. coli) contamination, such as that with E. coli O157 and O104, is very common, even in developed countries. Bacterial contamination may occur during any of the steps in the farm-to-table continuum from environmental, animal, or human sources and cause foodborne illness. To understand the causes of the foodborne outbreaks by E. coli and food-contamination prevention measures, we collected and investigated the past 10 years' worldwide reports of foodborne E...
June 9, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28597197/effect-of-environmental-stress-on-cell-surface-and-membrane-fatty-acids-of-lactobacillus-plantarum
#10
Najla Haddaji, Abdel Kaim Mahdhi, Manel Ben Ismaiil, Amina Bakhrouf
Adhesion has been regarded as one of the basic features of probiotics. We undertake this study in the aim to give new insight about the change in cellular physiological state under heat and acid treatments of Lactobacillus plantarum. Different cell properties have been investigated such as adhesive ability to abiotic surfaces, the cell surface hydrophobicity and the fatty acids profiles. The results of cell surface properties and Gas chromatography analysis demonstrated a modification in term adhesive ability and fatty acid (FA) composition of the tested strain under stressful conditions...
June 8, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28597196/draft-genome-sequence-of-the-potato-pathogen-rhizoctonia-solani-ag3-pt-isolate-ben3
#11
Daniel Wibberg, Franziska Genzel, Bart Verwaaijen, Jochen Blom, Oliver Rupp, Alexander Goesmann, Rita Zrenner, Rita Grosch, Alfred Pühler, Andreas Schlüter
The basidiomycetes fungus Rhizoctonia solani AG3 is responsible for black scurf disease on potato and occurs in each potato growing area world-wide. In this study, the draft genome sequence of the black scurf pathogen R. solani AG3-PT isolate Ben3 is presented. The genome sequence of R. solani AG3-PT isolate Ben3 consists of 1385 scaffolds. These scaffolds amount to a size of approx. 51 Mb. Considering coverage analyses of contigs, the size of the diploid genome was estimated to correspond to 116 Mb. Gene prediction by applying AUGUSTUS (3...
June 8, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28577180/olivibacter-flavus-sp-nov-a-novel-endophytic-bacterium-isolated-from-the-root-of-camellia-sinensis
#12
Lei Tian, Tong-Wei Guan, Ling-Ling Yang, Kai-Yang Lu, Bing-Bing Liu, Wei-Xun ChunYu, Min Yin, En-Yuan Li, Yang Ji, Xiao-Ping Zhang, Shu-Kun Tang
A novel Gram-negative rod, endophytic bacterium, designated strain TMCC 8258(T), was isolated from the root of Camellia sinensis collected from Puer, south-west China. Comparative 16S rRNA gene sequence analysis showed that the strain belongs to the family Sphingobacteriaceae and a neighbour-joining phylogenetic tree suggested that strain TMCC 8258(T) formed a cluster with the type strain of Olivibacter ginsengisoli (showed the highest 16S rRNA gene sequence similarity of 95.8%). Chemotaxonomic data [major fatty acid iso-C15:0, summed feature 3 (C16:1 ω7c and/or C16:1 ω6c), iso-C17:0 3-OH and major respiratory quinone MK-7] confirmed the affiliation of strain TMCC 8258(T) to the genus Olivibacter...
June 2, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28573482/glycomyces-xinjiangensis-sp-nov-a-novel-actinomycete-isolated-from-a-hypersaline-habitat
#13
Tong-Wei Guan, Hui-Ping Xiang, Peng-Hao Wang, Lei Tian, Shu-Kun Tang, Shun-Xian Zhao, Xi-Chao Zhang
A novel actinomycete strain, designated XHU 5301(T), was isolated from a hypersaline habitat, China. The strain was aerobic, Gram-stain positive and the optimum NaCl concentration for growth was 7-9% (w/v). Phylogenetic analysis based on an almost-complete 16S rRNA gene sequence of strain XHU 5301(T) showed that the organism was most closely related to Glycomyces halotolerans TRM 40137(T) (96.0%). The whole-cell sugar pattern consisted of glucose and galactose. The predominant menaquinone was MK-10(H4), MK-10(H2), and MK-9(H4)...
June 1, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28551732/bradyrhizobium-brasilense-sp-nov-a-symbiotic-nitrogen-fixing-bacterium-isolated-from-brazilian-tropical-soils
#14
Elaine Martins da Costa, Amanda Azarias Guimarães, Rayssa Pereira Vicentin, Paula Rose de Almeida Ribeiro, Aniele Carolina Ribas Leão, Eduardo Balsanelli, Liesbeth Lebbe, Maarten Aerts, Anne Willems, Fatima Maria de Souza Moreira
Four strains of rhizobia isolated from nodules of Vigna unguiculata (UFLA03-321(T), UFLA03-320 and UFLA03-290) and Macroptilium atropurpureum (UFLA04-0212) in Brazilian soils were previously reported as a new group within the genus Bradyrhizobium. To determine their taxonomic position, these strains were characterized in this study using a polyphasic approach. The analysis of the 16S rRNA gene grouped the four strains with Bradyrhizobium pachyrhizi PAC48(T). However, the concatenated sequence analysis of the two (recA and glnII) or three (atpD, gyrB and recA) housekeeping genes indicated that these strains represent a novel species of Bradyrhizobium, which is very closely related to B...
May 27, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28550409/lipid-droplets-accumulation-and-other-biochemical-changes-induced-in-the-fungal-pathogen-ustilago-maydis-under-nitrogen-starvation
#15
Lucero Romero Aguilar, Juan Pablo Pardo, Mónica Montero Lomelí, Oscar Ivan Luqueño Bocardo, Marco A Juárez Oropeza, Guadalupe Guerra Sánchez
In many organisms, the growth under nitrogen-deprivation or a poor nitrogen source impacts on the carbon flow distribution and causes accumulation of neutral lipids, which are stored as lipid droplets (LDs). Efforts are in progress to find the mechanism of LDs synthesis and degradation, and new organisms capable of accumulating large amounts of lipids for biotechnological applications. In this context, when Ustilago maydis was cultured in the absence of a nitrogen source, there was a large accumulation of lipid bodies containing mainly triacylglycerols...
May 26, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28540503/hydroxy-al-and-cell-surface-negativity-are-responsible-for-the-enhanced-sensitivity-of-rhodotorula-taiwanensis-to-aluminum-by-increased-medium-ph
#16
Xue Qiang Zhao, Xue Min Bao, Chao Wang, Zuo Yi Xiao, Zhen Min Hu, Chun Li Zheng, Ren Fang Shen
Aluminum (Al) is ubiquitous and toxic to microbes. High Al(3+) concentration and low pH are two key factors responsible for Al toxicity, but our present results contradict this idea. Here, an Al-tolerant yeast strain Rhodotorula taiwanensis RS1 was incubated in glucose media containing Al with a continuous pH gradient from pH 3.1-4.2. The cells became more sensitive to Al and accumulated more Al when pH increased. Calculations using an electrostatic model Speciation Gouy Chapman Stern indicated that, the increased Al sensitivity of cells was associated with AlOH(2+) and Al(OH) 2(+) rather than Al(3+)...
May 24, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28528473/properties-of-streptomyces-albus-j1074-mutant-deficient-in-trna-leu-uaa-gene-blda
#17
Oksana Koshla, Maria Lopatniuk, Ihor Rokytskyy, Oleksandr Yushchuk, Yuriy Dacyuk, Victor Fedorenko, Andriy Luzhetskyy, Bohdan Ostash
Streptomyces albus J1074 is one of the most popular and convenient hosts for heterologous expression of gene clusters directing the biosynthesis of various natural metabolic products, such as antibiotics. This fuels interest in elucidation of genetic mechanisms that may limit secondary metabolism in J1074. Here, we report the generation and initial study of J1074 mutant, deficient in gene bldA for tRNA(Leu)UAA, the only tRNA capable of decoding rare leucyl TTA codon in Streptomyces. The bldA deletion in J1074 resulted in a highly conditional Bld phenotype, with depleted formation of aerial hyphae on certain solid media...
May 20, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28508092/a-metabonomic-analysis-on-the-response-of-enterobacter-cloacae-from-coastal-outfall-for-land-based-pollutant-under-phoxim-stress
#18
Dijun Zhang, Shan He, Tinghong Ming, Chenyang Lu, Jun Zhou, Xiurong Su
Enterobacter cloacae is an opportunistic pathogen widely distributed in human and animal intestinal systems. The secretion of extended-spectrum β-lactamases (ESBLs) and cephalosporinase (AmpC) endows E. cloacae with strong drug resistance. In a previous study by our group, protein expression of E. cloacae under phoxim stress was measured by two-dimensional electrophoresis. Here, nuclear magnetic resonance was used to detect differences in E. cloacae metabonomics when under phoxim stress. We determined that there are 29 types of metabolites that differ between phoxim stress and normal culture conditions...
May 15, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28487997/the-effectiveness-of-anti-biofilm-and-anti-virulence-properties-of-dihydrocelastrol-and-dihydrocelastryl-diacetate-in-fighting-against-methicillin-resistant-staphylococcus-aureus
#19
Seung-Gyun Woo, So-Min Lee, So-Yeon Lee, Kyoung-Hee Lim, Eun-Ju Ha, Sa-Hyun Kim, Yong-Bin Eom
Human pathogens have readily been converted into multidrug-resistant pathogens, such as methicillin-resistant Staphylococcus aureus (MRSA), because of the long-term use of conventional antibiotics. In addition, the biofilms formed by S. aureus cells are especially problematic and are related to the persistence of chronic infections because they constitute a major mechanism of promoting tolerance to diverse antimicrobial agents. Hence, the inhibitions of biofilm formation and/or toxin production are accepted as alternative means of controlling S...
May 9, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28478602/identification-of-the-zinc-copper-and-cadmium-metalloproteome-of-the-protozoon-tetrahymena-thermophila-by-systematic-bioinformatics
#20
Christos T Chasapis, Claudia Andreini, Athanasia K Georgiopolou, Maria E Stefanidou, Alexios Vlamis-Gardikas
Tetrahymena thermophila (T. thermophila) is a ciliated protozoon that can detect freshwater pollution by heavy metals ("whole-cell biosensor"). This work employed a systematic bioinformatics approach to predict and analyze the metalloproteome of T. thermophila for the essential Zn, Cu and the non-essential Cd. 3784 metal-binding proteins were identified compared to the 456 annotated so far in UniProt. The localization, functional classification, and the functionally enriched network of the newly identified metalloproteome are presented...
May 6, 2017: Archives of Microbiology
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