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Folia Microbiologica

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https://www.readbyqxmd.com/read/28646380/isolation-selection-and-biological-characterization-research-of-highly-effective-electricigens-from-mfcs-for-phenol-degradation
#1
Guo Wei, Du Xia, Wang Li-Li, Yan Hong
The microbial fuel cells (MFCs) are recognized to be highly effective for the biodegradation of phenol. For isolating the phenol-degrading bacteria, the sample containing 500 mg/L phenol was collected from the MFCs. The strain (WL027) was identified basing on the 16S rRNA gene analysis and phylogenetic analysis as Bacillus cereus. The effects of pH, temperature, concentrations of phenol, heavy metal ions, and salt on the growth of strain as well as the degradation of phenol have been carefully studied. The WL027-strain exhibited favorable tolerance for the metal cations including Cr(2+), Co(2+), Pb(2+), and Cu(2+) with the concentration of 0...
June 23, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28631154/soil-derived-organic-particles-and-their-effects-on-the-community-of-culturable-microorganisms
#2
Lukáš Bystrianský, Marcel Štofik, Milan Gryndler
Soil microbial community interacts with a range of particulate material in the soil, consisting of both inorganic and organic compounds with different levels of water solubility. Though sparingly water-soluble and insoluble organic compounds in the soil may affect living organisms, they are difficult to introduce into microbiological media. Their biological activity (i.e., their effect on soil microorganisms) thus has been almost neglected in most of the cultivation assays. To fill this gap, we propose the use of fine organic particles prepared from soil organic matter that are introduced into a laboratory medium where microbial community is cultivated...
June 19, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28623536/comparison-of-fungicidal-properties-of-non-thermal-plasma-produced-by-corona-discharge-and-dielectric-barrier-discharge
#3
J Julák, H Soušková, V Scholtz, E Kvasničková, D Savická, V Kříha
The inactivation of four micromycete species by action of non-thermal plasma was followed. Two sources of plasma were compared, namely, positive corona discharge and dielectric barrier discharge. The corona discharge appeared as suitable for fungal spore inactivation in water suspension, whereas the barrier discharge inactivated spores on the surface of cultivation agar. Cladosporium sphaerospermum was the most sensitive, being inactivated within 10 min of exposure to plasma, whereas Aspergillus oryzae displayed decrease in viable cell count only, the complete inactivation was not achieved even after 40 min of exposure...
June 17, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28597345/antimicrobial-effect-of-okcel%C3%A2-h-d-prepared-from-oxidized-cellulose
#4
Petra Moťková, Iveta Brožková, Jarmila Vytřasová, Rudolf Kukla
The antimicrobial effect of OKCEL® H-D, a topical, absorbable hemostatic textile prepared from oxidized cellulose, was tested. Testing by dilution and diffusion methods was conducted on a spectrum of 27 select microorganisms, including also antibiotic-resistant strains. OKCEL® H-D showed inhibitory effects on nearly all tested bacteria. In testing using the dilution suspension method, the majority of bacteria showed decrease in cell density by 7-8 orders of magnitude after just 6 h of exposure. For clinical isolates of antibiotic-resistant strains, a reduction occurred after 24 h of exposure...
June 8, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28551852/cultivable-microscopic-fungi-from-an-underground-chemosynthesis-based-ecosystem-a-preliminary-study
#5
Alena Nováková, Vít Hubka, Šárka Valinová, Miroslav Kolařík, Alexandra Maria Hillebrand-Voiculescu
Movile Cave, a unique groundwater ecosystem in southern Romania, was discovered in 1986. This chemoautotrophic cave contains an abundant and diverse fauna with terrestrial and aquatic invertebrate communities, including 33 endemic species. Since its discovery, studies have focused mainly on cave chemoautotrophic bacteria, while the microfungal community has been largely neglected. In this study, we determined the microfungal species living on various substrates in Movile Cave and compared this spectrum with the mycobiota detected outside the cave (outside air-borne and soil-borne microfungi)...
May 28, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28550367/in-vitro-study-of-antioxidant-and-antibacterial-activities-of-lactobacillus-probiotic-spp
#6
Z Pourramezan, R Kasra Kermanshahi, M Oloomi, A Aliahmadi, H Rezadoost
This study investigated the influence of aeration and minimal medium conditions on antioxidant and antibacterial activities of 21 probiotic Lactobacillus strains isolated from dairy products. The probiotic potential of the isolates was evaluated by pH and bile tolerance. Random amplified polymorphic DNA polymerase chain reaction (RAPD-PCR) was used to confirm the phenotypic identification of isolates. Antioxidant producer isolates were screened by resistance to reactive oxygen species (ROS). The antioxidant and antibacterial activities of extracellular materials after 48 h fermentation with antioxidative strains were determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and broth microdilution assays, respectively...
May 26, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28540585/antibiofilm-activity-and-mode-of-action-of-dmso-alone-and-its-combination-with-afatinib-against-gram-negative-pathogens
#7
Mohd Fakharul Zaman Raja Yahya, Zazali Alias, Saiful Anuar Karsani
Biofilms are complex microbial communities that tend to attach to either biotic or abiotic surface. Enclosed in a self-produced extracellular polymeric substance (EPS) matrix, the biofilms often cause persistent infections. The objective of this study was to investigate the antibiofilm activity of dimethyl sulfoxide (DMSO) and afatinib against Gram-negative pathogens. Test microorganisms used in this study were Escherichia coli ATCC 1299, Pseudomonas aeruginosa ATCC 10145, and Salmonella typhimurium ATCC 14028...
May 24, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28534230/trueperella-pyogenes-isolated-from-a-brain-abscess-of-an-adult-roebuck-capreolus-capreolus
#8
Jörn-Peter Wickhorst, Abdulwahed Ahmed Hassan, Omar Hashim Sheet, Tobias Eisenberg, Osama Sammra, Mazen Alssahen, Christoph Lämmler, Ellen Prenger-Berninghoff, Michael Zschöck, Markus Timke, Amir Abdulmawjood
The present study was designed to characterize phenotypically and genotypically a Trueperella pyogenes strain isolated from a brain abscess of an adult roebuck (Capreolus capreolus). The species identity could be confirmed by phenotypical investigations, by MALDI-TOF MS analysis, and by sequencing the 16S ribosomal RNA (rRNA) gene, the 16S-23S rRNA intergenic spacer region (ISR); by sequencing the target genes rpoB, gap, and tuf; and by detection of T. pyogenes chaperonin-encoding gene cpn60 with a previously developed loop-mediated isothermal amplification (LAMP) assay...
May 23, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28516267/methods-of-candida-dubliniensis-identification-and-its-occurrence-in-human-clinical-material
#9
Martina Mahelová, Filip Růžička
Candida dubliniensis was reported as a new species in 1995. This species is often misidentified as Candida albicans. The aims of this work were to determine the occurrence of C. dubliniensis in various clinical materials, to evaluate several ways to identify it and to examine the genetic variability of isolates. Among 7706 isolates originally identified as C. albicans, 237 were identified as C. dubliniensis (3.1%). Most of the C. dubliniensis isolates were obtained from the upper and lower respiratory tract (61...
May 17, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28497337/identification-of-calmodulin-binding-proteins-in-the-entomopathogenic-fungus-beauveria-bassiana
#10
Jiyoung Kim, Junsang Oh, Deok-Hyo Yoon, Gi-Ho Sung
Calmodulin (CaM) is a primary Ca(2+) receptor and plays a pivotal role in a variety of cellular responses in eukaryotes. Even though a large number of CaM-binding proteins are well known in yeast, plants, and animals, little is known regarding CaM-targeted proteins in filamentous fungi. To identify CaM-binding proteins in filamentous fungi, we used a proteomics method coupled with co-immunoprecipitation (CoIP) and MALDI-TOF/TOF mass spectrometry (MS) in Beauveria bassiana. Through this method, we identified ten CaM-binding proteins in B...
May 11, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28451946/using-phenotype-microarrays-in-the-assessment-of-the-antibiotic-susceptibility-profile-of-bacteria-isolated-from-wastewater-in-on-site-treatment-facilities
#11
Łukasz Jałowiecki, Joanna Chojniak, Elmar Dorgeloh, Berta Hegedusova, Helene Ejhed, Jörgen Magnér, Grażyna Płaza
The scope of the study was to apply Phenotype Biolog MicroArray (PM) technology to test the antibiotic sensitivity of the bacterial strains isolated from on-site wastewater treatment facilities. In the first step of the study, the percentage values of resistant bacteria from total heterotrophic bacteria growing on solid media supplemented with various antibiotics were determined. In the untreated wastewater, the average shares of kanamycin-, streptomycin-, and tetracycline-resistant bacteria were 53, 56, and 42%, respectively...
April 27, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28409422/influence-of-long-term-equine-herpesvirus-type-1-ehv-1-infection-on-primary-murine-neurons-the-possible-effects-of-the-multiple-passages-of-ehv-1-on-its-neurovirulence
#12
Joanna Cymerys, A Słońska, A Tucholska, A Golke, A Chmielewska, M W Bańbura
Equine herpesvirus 1 (EHV-1), like other members of the Alphaherpesvirinae subfamily, is a neurotropic virus causing latent infections in the nervous system of the natural host. In the present study, we have investigated EHV-1 replication (wild-type Jan-E strain and Rac-H laboratory strain) during long-term infection and during the passages of the virus in cultured neurons. The studies were performed on primary murine neurons, which are an excellent in vitro model for studying neurotropism and neurovirulence of EHV-1...
April 13, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28401403/analysis-of-antimicrobial-and-immunomodulatory-substances-produced-by-heterofermentative-lactobacillus-reuteri
#13
Gabriela Greifová, Hyacinta Májeková, Gabriel Greif, Patrik Body, Maria Greifová, Martina Dubničková
Antimicrobial and immunomodulatory potential of various Lactobacillus reuteri strains is closely connected to their metabolite production profile under given cultivation conditions. We determined the in vitro production of antimicrobial substances such as organic acids, ethanol, and reuterin by four strains of L. reuteri (L. reuteri E, L. reuteri KO5, L. reuteri CCM 3625, and L. reuteri ATCC 55730). All studied L. reuteri strains showed the ability to produce lactic acid, acetic acid, and ethanol with concominant consumption of glucose and together with phenyllactic acid-a potent antifungal compound-with concominant consumption of phenylalanine...
April 11, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28382524/characterization-of-a-metagenome-derived-protease-from-contaminated-agricultural-soil-microorganisms-and-its-random-mutagenesis
#14
Chengjian Jiang, Liang Zhang, Fajia Li, Can Meng, Rong Zeng, Jie Deng, Peihong Shen, Qian Ou, Bo Wu
Proteases are typical key enzymes that hydrolyze proteins into amino acids and peptides. Numerous proteases have been studied, but the discovery of metagenome-derived proteases is still significant for both commercial applications and basic research. An unexplored protease gene sep1A was identified by function-based screening from a plasmid metagenomic library derived from uncultured contaminated agricultural soil microorganisms. The putative protease gene was subcloned into pET-32a (+) vector and overexpressed in E...
April 5, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28365878/biofilm-formation-antibiotic-susceptibility-and-rapd-genotypes-in-pseudomonas-aeruginosa-clinical-strains-isolated-from-single-centre-intensive-care-unit-patients
#15
Martina Vaněrková, Barbora Mališová, Iva Kotásková, Veronika Holá, Filip Růžička, Tomáš Freiberger
The aim of this study was to analyse genotypes, antimicrobial susceptibility patterns and serotypes in Pseudomonas aeruginosa clinical strains, including the clonal dissemination of particular strains throughout various intensive care units in one medical centre. Using random amplified polymorphic DNA (RAPD-PCR) and P. aeruginosa antisera, 22 different genotypes and 8 serotypes were defined among 103 isolates from 48 patients. No direct association between P. aeruginosa strain genotypes and serotypes was observed...
April 1, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28364392/burkholderia-cepacia-complex-in-cystic-fibrosis-in-the-post-epidemic-period-multilocus-sequence-typing-based-approach
#16
Libor Fila, Pavel Dřevínek
Cystic fibrosis (CF) patients in the Czech Republic suffered in the late 1990s from an epidemic with ST32 strain of Burkholderia cepacia complex (Bcc). Cohort segregation of Bcc and of ST32 positive patients was introduced in 1999 and 2002, respectively. We performed a study to evaluate the molecular epidemiology of Bcc infection after implementation of these infection control measures. Patients attending the Prague CF adult Centre from 2000 to 2015 were included in the present study. Demographic data and microbial statuses were collected from patient records...
March 31, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28361459/distribution-and-antifungal-susceptibility-of-yeasts-isolates-from-intensive-care-unit-patients
#17
Vladimír Hrabovský, Victoria Takáčová, Eva Schréterová, Lydia Pastvová, Zuzana Hrabovská, Katarina Čurová, Leonard Siegfried
Yeasts frequently colonize non-sterile sites in the body. The aim of the study was to determine distribution in clinical samples and antifungal susceptibility to five antifungals. From January 2013 through June 2015, 800 isolates were obtained from intensive care unit patients. Candida albicans (58.9%), Candida glabrata (20.4%), Candida krusei (8.6%), and Candida parapsilosis (3.6%) were the leading species. Majority of the C. albicans isolates were susceptible to the fluconazole. Elevated voriconazole minimal inhibitory concentrations (MICs) were observed in isolates exhibiting high fluconazole MICs, most frequently in C...
March 30, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28124783/diversity-of-culturable-bacterial-communities-in-the-intestinal-tracts-of-goldfish-carassius-auratus-and-their-ability-to-produce-n-acyl-homoserine-lactone
#18
Haruo Sugita, Shun Kitao, Satoshi Narisawa, Ryosuke Minamishima, Shiro Itoi
Intestinal bacteria isolated from goldfish (Carassius auratus) were identified based on 16 ribosomal RNA (rRNA) gene sequences and screened for their ability to produce N-acyl homoserine lactone (AHL), an autoinducer of the quorum sensing (QS) system. The 230 aerobes/facultative anaerobes that were isolated comprised members of the genera Aeromonas (184 isolates), Citrobacter (11), Enterobacter (2), Shewanella (28), Vagococcus (1), and Vibrio (4). Among these genera, the two most abundant species were Aeromonas veronii (163 isolates) and Shewanella xiamenensis (27)...
May 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28108870/elucidating-the-interactions-and-phytotoxicity-of-zinc-oxide-nanoparticles-with-agriculturally-beneficial-bacteria-and-selected-crop-plants
#19
Anuraag Boddupalli, Rameshwar Tiwari, Anamika Sharma, Surender Singh, Radha Prasanna, Lata Nain
There is a growing interest in the use of bioinoculants to assist mineral fertilizers in improving crop production and yield. Azotobacter and Pseudomonas are two agriculturally relevant strains of bacteria which have been established as efficient bioinoculants. An experiment involving addition of graded concentrations of zinc oxide (ZnO) nanoparticles was undertaken using log phase cultures of Azotobacter and Pseudomonas. Growth kinetics revealed a clear trend of gradual decrease with Pseudomonas; however, Azotobacter exhibited a twofold enhancement in growth with increase in the concentration of ZnO concentration...
May 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28105601/gordonia-isolation-and-identification-in-clinical-samples-and-role-in-biotechnology
#20
REVIEW
Fatemeh Andalibi, Mehdi Fatahi-Bafghi
Gordonia spp. are members of the actinomycete family, and the environment, especially soil, is the natural habitat of this genus of bacteria. Gordonia spp. are important for two aspects: first, some Gordonia species cause a broad spectrum of diseases in healthy and immunocompromised individuals; second, these bacteria are capable of producing useful secondary metabolites, which may be used in various industries; therefore, discrimination of the genus Gordonia from other genera in the actinomycete family is important...
May 2017: Folia Microbiologica
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