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Current Microbiology

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https://www.readbyqxmd.com/read/28078431/degradation-of-di-2-ethylhexyl-phthalate-by-a-novel-gordonia-alkanivorans-strain-yc-rl2
#1
Ruth Nahurira, Lei Ren, Jinlong Song, Yang Jia, Junhuan Wang, Shuanghu Fan, Haisheng Wang, Yanchun Yan
One bacterial strain, YC-RL2, isolated from petroleum-contaminated soil, could utilize environmental hormone Di(2-Ethylhexyl) phthalate (DEHP) as a sole carbon source for growth. Strain YC-RL2 was identified as Gordonia alkanivorans by 16S rRNA gene analysis and Biolog tests. The effects of environmental factors which might affect the degrading process were optimized at 30 °C and pH 8.0. Strain YC-RL2 showed superior halotolerance and could tolerate up to 0-5% NaCl in trace element medium supplemented with DEHP, although the DEHP degradation rates slowed as NaCl concentration increased...
January 12, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28025658/microorganisms-good-or-evil-mirri-provides-biosecurity-awareness
#2
David Smith, Dunja Martin, Tatyana Novossiolova
The life-science community is a key stakeholder in the effort to ensure that the advances in biotechnology are not misused. Unfortunately, to date, the engagement of life scientists with issues of biosecurity has been limited. Microorganisms have been harnessed for the benefit of humankind but in the wrong hands could be used in direct or indirect acts against humans, livestock, crops, food, water infrastructure and other economically valuable entities. The Microbial Resources Research Infrastructure in its preparatory phase has addressed the topic implementing a code of conduct as part of its programme of prevention of malicious use and continues to work with the international community to raise awareness of best practice to avoid misuse of microorganisms...
December 26, 2016: Current Microbiology
https://www.readbyqxmd.com/read/28004139/genome-shuffling-of-stenotrophomonas-maltophilia-ok-5-for-improving-the-degradation-of-explosive-rdx-hexahydro-1-3-5-trinitro-1-3-5-triazine
#3
Bheong-Uk Lee, Moon-Seop Choi, Dong-Min Kim, Kye-Heon Oh
A genome-shuffled Stenotrophomonas maltophilia strain showing the enhanced ability of RDX degradation was constructed, and its characteristics were compared with those of the wild-type one. The shuffled strain was able to completely degrade 25, 50, and 75 µM RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine) within 10, 30, and 50 days, respectively. However, it took 30 and 70 days for the wild-type strain to degrade 25 and 50 µM RDX, respectively, and at day 70, the strain degraded only 67% of 75 µM RDX...
December 22, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27999939/heat-survival-and-phenotype-microarray-profiling-of-salmonella-typhimurium-mutants
#4
Turki M Dawoud, Anita Khatiwara, Si Hong Park, Morgan L Davis, Christopher A Baker, Steven C Ricke, Young Min Kwon
Contamination of food products by pathogenic microorganisms continues to be a major public health and food industry concern. Non-typhoidal Salmonella species have led to numerous outbreaks associated with various foods. A wide variety of methods have been applied and introduced for treatment of fresh foods to eliminate pathogenic as well as spoilage microorganisms. Salmonella can become exposed to elevated temperatures while associated with hosts such as poultry. In addition, heat treatment is also applied at various stages of processing to retain the shelf life of food products...
December 21, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27999938/characterization-of-cinnamoyl-esterases-from-different-lactobacilli-and-bifidobacteria
#5
Caroline Fritsch, André Jänsch, Matthias A Ehrmann, Simone Toelstede, Rudi F Vogel
A high variety of plants that are used for food production contain esterified hydroxycinnamic acids. As their free forms display several benefits, like an enhanced absorption in human intestinal tract, anti-oxidative and anti-carcinogenic effects, an improved protein solubility and reduced discoloration, the microbial ability to cleave the ester bond is highly desired. In order to examine potential fermentation strains for this purpose, six different lactic acid bacteria and one bifidobacterial strain were screened for their ability to degrade esterified hydroxycinnamic acids because these strains are commonly used for fermentation of plant-based foods...
December 21, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27995305/stubborn-disease-in-iran-diversity-of-spiroplasma-citri-strains-in-circulifer-haematoceps-leafhoppers-collected-in-sesame-fields-in-fars-province
#6
Zahra Zarei, Mohammad Salehi, Zabihallah Azami, Khadijeh Salari, Laure Béven
Spiroplasma citri is a bacterial pathogen responsible for the economically important citrus stubborn disease. Sesame and citrus seeds serve as hosts for both S. citri and its leafhopper vector Circulifer haematoceps. To evaluate whether sesame could act as a reservoir for citrus-infecting strains or not, the genetic diversity among S. citri strains found in leafhoppers collected in citrus and citrus-free sesame fields was investigated. Among 26 periwinkle plants exposed to the collected C. haematoceps leafhoppers, 12 plants developed typical stubborn symptoms...
December 20, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27990601/comparative-analysis-of-proteome-patterns-of-francisella-tularensis-isolates-from-patients-and-the-environment
#7
Murat Kasap, Aynur Karadenizli, Gürler Akpınar, Hüseyin Uzuner, Abula Ayimugu, Kübra Karaosmanoğlu, Doğanhan Kadir Er
Francisella tularensis is the causative agent of tularemia. Although major contributors and the main mechanism of the virulence are well known, some of the molecular details are still missing. Proteomics studies regarding F. tularensis have provided snapshot pictures of the organism grown under different culture conditions to understand the mechanism of virulence. In general, such studies were carried out with standard strains e.g., LVS and did not involve comparisons of F. tularensis isolates from either clinical or environmental sources...
December 19, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27957631/virgibacillus-ainsalahensis-sp-nov-a-moderately-halophilic-bacterium-isolated-from-sediment-of-a-saline-lake-in-south-of-algeria
#8
Meriam Amziane, Amel Darenfed-Bouanane, Ahmed Abderrahmani, Okba Selama, Lydia Jouadi, Jean-Luc Cayol, Farida Nateche, Marie-Laure Fardeau
A Gram-positive, moderately halophilic, endospore-forming bacterium, designated MerV(T), was isolated from a sediment sample of a saline lake located in Ain Salah, south of Algeria. The cells were rod shaped and motile. Isolate MerV(T) grew at salinity interval of 0.5-25% NaCl (optimum, 5-10%), pH 6.0-12.0 (optimum, 8.0), and temperature between 10 and 40 °C (optimum, 30 °C).The polar lipids comprised diphosphatidylglycerol, phosphatidylglycerol, a glycolipid, a phospholipid, and two lipids, and MK-7 is the predominant menaquinone...
December 12, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27957630/characterization-of-gastric-microbiota-in-twins
#9
Quanjiang Dong, Yongning Xin, Lili Wang, Xinying Meng, Xinjuan Yu, Linlin Lu, Shiying Xuan
Contribution of host genetic backgrounds in the development of gastric microbiota has not been clearly defined. This study was aimed to characterize the biodiversity, structure and composition of gastric microbiota among twins. A total of four pairs of twins and eight unrelated individuals were enrolled in the study. Antral biopsies were obtained during endoscopy. The bacterial 16S rRNA gene was amplified and pyrosequenced. Sequences were analyzed for the composition, structure, and α and β diversities of gastric microbiota...
December 12, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27942843/common-findings-of-bla-ctx-m-55-encoding-104-139-kbp-plasmids-harbored-by-extended-spectrum-%C3%AE-lactamase-producing-escherichia-coli-in-pork-meat-wholesale-market-workers-and-patients-with-urinary-tract-infection-in-vietnam
#10
T A V Hoang, T N H Nguyen, S Ueda, Q P Le, T T N Tran, T N D Nguyen, T V K Dao, M T Tran, T T T Le, T L Le, T Nakayama, I Hirai, T H Do, Q M Vien, Y Yamamoto
Extended-spectrum, β-lactamase-producing Escherichia coli (ESBL-E) harboring the bla CTX-M-55-encoding plasmid (ESBL-E55) has been reported to be associated with urinary tract infection (UTI). The aims of this study were to clarify the prevalence of ESBL-E55 in pork meats and workers from the same wholesale market, as well as patients with UTI from a nearby hospital in Vietnam; we also investigated the plasmids encoding bla CTX-M-55. Sequencing analysis showed that 66.6% of the ESBL-E isolated from pork meats contained bla CTX-M-55, whereas the gene was present in 25...
December 9, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27942842/isolation-and-genome-sequencing-of-a-novel-pseudoalteromonas-phage-ph1
#11
Zhaoyang Liu, Min Wang, Xue Meng, Yan Li, Duobing Wang, Yong Jiang, Hongbing Shao, Yaoyuan Zhang
The family Pseudoalteromonas is highly adaptable to dissimilar ecological habitats and plays an important ecological role in the marine environment. In this study, a new Pseudoalteromonas phage PH1 was isolated from the Yellow Sea. To better understand the bacteriophage, its biological properties, including morphology, host range, growth phenotype, thermal and pH stability, and nucleic acid composition, were investigated in detail. The result showed that the phage PH1 is a Podoviridae-phage with an icosahedral head (60 nm of diameter) and a short tail (26 nm in length)...
December 9, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27933337/biodegradation-of-the-herbicide-2-4-dichlorophenoxyacetic-acid-by-a-new-isolated-strain-of-achromobacter-sp-lz35
#12
Zhen-Yuan Xia, Long Zhang, Yan Zhao, Xin Yan, Shun-Peng Li, Tao Gu, Jian-Dong Jiang
In this study, a bacterial strain of Achromobacter sp. LZ35, which was capable of utilizing 2,4-dichlorophenoxyacetic acid (2,4-D) and 2-methyl-4-chlorophenoxy acetic acid (MCPA) as the sole sources of carbon and energy for growth, was isolated from the soil in a disused pesticide factory in Suzhou, China. The optimal 2,4-D degradation by strain LZ35 occurred at 30 °C and pH 8.0 when the initial 2,4-D concentration was 200 mg L(-1). Strain LZ35 harbored the conserved 2,4-D/alpha-ketoglutarate dioxygenase (96%) and 2,4-dichlorophenol hydroxylase (99%), and catabolized 2,4-D via the intermediate 2,4-dichlorophenol...
December 8, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27913879/termitarium-inhabiting-bacillus-spp-enhanced-plant-growth-and-bioactive-component-in-turmeric-curcuma-longa-l
#13
Ankit Kumar Chauhan, Dinesh Kumar Maheshwari, Shrivardhan Dheeman, Vivek K Bajpai
Curcumin (diferuloyl methane) is the main bioactive component of turmeric (Curcuma longa L.) having remarkable multipotent medicinal and therapeutic applications. Two Bacilli isolated from termitarium soil and identified as Bacillus endophyticus TSH42 and Bacillus cereus TSH77 were used for bacterization of rhizome for raising C. longa ver. suguna for growth and enhancement. Both the strains showed remarkable PGP activities and also chemotactic in nature with high chemotactic index. Turmeric plants bacterized with strains B...
December 2, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27900459/isolation-characterization-and-bioinformatic-analyses-of-lytic-salmonella-enteritidis-phages-and-tests-of-their-antibacterial-activity-in-food
#14
Han Han, Xiaoting Wei, Yi Wei, Xiufeng Zhang, Xuemin Li, Jinzhong Jiang, Ran Wang
Salmonella Enteritidis remains a major threat for food safety. To take efforts to develop phage-based biocontrol for S. Enteritidis contamination in food, in this study, the phages against S. Enteritidis were isolated from sewage samples, characterized by host range assays, DNA restriction enzyme pattern analyses, and transmission electron microscope observations, and tested for antibacterial activity in food; some potent phages were further characterized by bioinformatic analyses. Results showed that based on the plaque quality and host range, seven lytic phages targeting S...
November 30, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27900448/the-archaeal-signal-recognition-particle-present-understanding-and-future-perspective
#15
REVIEW
Sayandeep Gupta, Mousam Roy, Abhrajyoti Ghosh
The signal recognition particle (SRP) and its receptor constitute universally conserved and essential cellular machinery that controls the proper membrane localization of nascent polypeptides with the transmembrane domain. In the past decade, there has been an immense advancement in our understanding of this targeting machine in all three domains of life. A significant portion of such progress came from the structural analysis of archaeal SRP components. Despite the availability of structural insights from different archaeal SRP components, little is known about protein translocation in this domain of life compared to either bacteria or eukaryotes...
November 29, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27896483/the-effects-of-different-carbon-sources-on-the-antifungal-activity-by-lactic-acid-bacteria
#16
Anna Toplaghaltsyan, Inga Bazukyan, Armen Trchounian
Lactobacillus rhamnosus R-2002 strain isolated from Armenian pickled cheese sample has a fungicide effect, which was carried out by the first-time designed method. The fungicide effect of LAB strain was expressed after 5 days of co-cultivation with Mucor plumbeus and 6 days of co-cultivation with Penicillium aurantioviolaceum. The growth as well as the antifungal activity of L. rhamnosus R-2002 was shown to directly depend on the nature of the medium's carbon source. The antifungal activity of this strain against both moulds was inhibited when the combination of 10 g l(-1) glucose and 10 ml l(-1) ethanol in the medium was used as a carbon source...
November 28, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27896482/phage-therapy-in-bacterial-infections-treatment-one-hundred-years-after-the-discovery-of-bacteriophages
#17
REVIEW
Agata Anna Cisek, Iwona Dąbrowska, Karolina Paulina Gregorczyk, Zbigniew Wyżewski
The therapeutic use of bacteriophages has seen a renewal of interest blossom in the last few years. This reversion is due to increased difficulties in the treatment of antibiotic-resistant strains of bacteria. Bacterial resistance to antibiotics, a serious problem in contemporary medicine, does not implicate resistance to phage lysis mechanisms. Lytic bacteriophages are able to kill antibiotic-resistant bacteria at the end of the phage infection cycle. Thus, the development of phage therapy is potentially a way to improve the treatment of bacterial infections...
November 28, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27896481/high-perineal-and-overall-frequency-of-staphylococcus-aureus-in-people-who-inject-drugs-compared-to-non-injectors
#18
Disa Dahlman, Farnaz Jalalvand, Marianne Alanko Blomé, Anders Håkansson, Håkan Janson, Susanne Quick, Anna C Nilsson
To investigate the prevalence, distribution, and colonization burden of Staphylococcus aureus (S. aureus) and MRSA in different body sites among people who inject drugs (PWID) and compare it to a control group consisting of non-injectors. In this cross-sectional survey, 49 active PWID from the needle exchange program (NEP) in Malmö, Sweden, and 60 non-injecting controls from an emergency psychiatric inpatient ward at Malmö Addiction Centre were tested for S. aureus (including MRSA) by culture, PCR, and MALDI-TOF...
November 28, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27885385/in-package-inactivation-of-pathogenic-and-spoilage-bacteria-associated-with-poultry-using-dielectric-barrier-discharge-cold-plasma-treatments
#19
Michael J Rothrock, Hong Zhuang, Kurt C Lawrence, Brian C Bowker, Gary R Gamble, Kelli L Hiett
The goal of this study was to test the efficacy of in-package dielectric barrier discharge-cold plasma (DBD-CP) treatment to inactivate poultry-associated spoilage (Pseudomonas fluorescens) and pathogenic (Salmonella enterica Typhimurium, Campylobacter jejuni) bacteria. Liquid cultures of the bacterial isolates were sealed within packages containing ambient air (Trial 1) or modified air (65% O2:30% CO2:5% N2; Trial 2). The packages were subjected to treatment times ranging from 30 to 180 s, and after 24 h incubation at 4 °C, bacterial titers were determined...
November 24, 2016: Current Microbiology
https://www.readbyqxmd.com/read/27878336/co-culturing-effects-of-coexisting-bacteria-on-wood-degradation-by-trametes-versicolor
#20
Ichiro Kamei
White-rot fungi are the main decomposers of wood cell-wall polymer in forest ecosystems. Little is known, however, about the interactions between white-rot fungi and other coexisting microorganisms in decayed wood. A white-rot fungus, Trametes versicolor strain TN6F, was isolated from a fruit body, and 44 strains of coexisting cultivable bacteria were isolated from its substrate, natural white rot-decayed wood. The effects of these bacteria on fungal growth were examined by an in vitro confrontation growth assay...
January 2017: Current Microbiology
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