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Folia Microbiologica

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https://www.readbyqxmd.com/read/29786766/bacterial-dna-detected-on-pathologically-changed-heart-valves-using-16s-rrna-gene-amplification
#1
Miroslava Chalupova, Anna Skalova, Tomas Hajek, Lenka Geigerova, Dana Kralova, Pavel Liska, Hana Hecova, Jiri Molacek, Jaroslav Hrabak
Nowadays, dental diseases are one of the most common illnesses in the world. Some of them can lead to translocation of oral bacteria to the bloodstream causing intermittent bacteraemia. Therefore, a potential association between oral infection and cardiovascular diseases has been discussed in recent years as a result of adhesion of oral microbes to the heart valves. The aim of this study was to detect oral bacteria on pathologically changed heart valves not caused by infective endocarditis. In the study, patients with pathologically changed heart valves were involved...
May 22, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29786765/analysis-of-streptomyces-ghanaensis-atcc14672-gene-ssfg_07725-for-putative-%C3%AE-butyrolactone-synthase
#2
Yuriy Kuzhyk, Halyna Mutenko, Victor Fedorenko, Bohdan Ostash
Low molecular weight signaling compounds (LMWC) are important players in regulating various aspects of Streptomyces biology. Their exact roles in certain strain will ultimately depend on overall configuration of regulatory network and thus cannot be predicted on basis of in silico studies. Here, we explored S. ghanaensis gene SSFG_07725 (afsA gh ) presumably involved in initial steps of formation of γ-butyrolactone LMWC. Disruption of afsA gh impaired aerial mycelium formation and increased the transcription of pleiotropic regulatory gene adpA gh , whereas level of moenomycin production remained virtually unaffected...
May 21, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29756170/further-characteristics-of-arcanobacterium-pinnipediorum-dsm-28752-t-and-arcanobacterium-wilhelmae-dsm-102162-t-two-novel-species-of-genus-arcanobacterium
#3
Osama Sammra, Jörg Rau, Jörn Wickhorst, Mazen Alssahen, Abdulwahed Ahmed Hassan, Christoph Lämmler, Ellen Prenger-Berninghoff, Amir Abdulmawjood
The newly described type strains Arcanobacterium pinnipediorum DSM 28752T and Arcanobacterium wilhelmae DSM 102162T , initially isolated from an anal swab of a harbor seal (Sammra et al. Int J Syst Evol Microbiol 65:4539-4543, 2015) and the genital tract of a rhinoceros (Sammra et al. Int J Syst Evol Microbiol 67:2093-2097, 2017), could be further characterized by matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) and Fourier transform infrared (FT-IR) spectroscopy and by sequencing the genomic targets 16S-23S rDNA intergenic spacer region (ISR) and the genes rpoB, gap, and tuf...
May 13, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29752627/maldi-tof-ms-supplementary-database-for-species-identification-employing-the-yeast-diversity-encountered-on-southern-brazil-grapes
#4
Bruna Carla Agustini, Gildo Almeida da Silva, Tania Maria Bordin Bonfim
The study of grape microflora is of interest when autochthonous yeasts, which are related to typical wine characteristics, are intended to be used in winemaking. The election of matrix-assisted laser desorption-ionization time-of-flight mass spectrometry (MALDI-TOF MS) as the first method for yeast identification was based on its accuracy and rapidity compared to alternative laboratory protocols for identification. The aims of this study are to consolidate the MALDI-TOF MS Supplementary database for environmental yeasts already constructed, to expand it through the addition of standard spectra of not included yeast species, and to discuss the grape microflora encountered in Southern Brazil...
May 11, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29736893/yeast-species-diversity-in-apple-juice-for-cider-production-evidenced-by-culture-based-method
#5
Marilinda Lorenzini, Barbara Simonato, Giacomo Zapparoli
Identification of yeasts isolated from apple juices of two cider houses (one located in a plain area and one in an alpine area) was carried out by culture-based method. Wallerstein Laboratory Nutrient Agar was used as medium for isolation and preliminary yeasts identification. A total of 20 species of yeasts belonging to ten different genera were identified using both BLAST algorithm for pairwise sequence comparison and phylogenetic approaches. A wide variety of non-Saccharomyces species was found. Interestingly, Candida railenensis, Candida cylindracea, Hanseniaspora meyeri, Hanseniaspora pseudoguilliermondii, and Metschnikowia sinensis were recovered for the first time in the yeast community of an apple environment...
May 7, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29728998/kh-type-splicing-regulatory-protein-is-regulated-by-nuclear-factor-%C3%AE%C2%BAb-signaling-to-mediate-innate-immunity-in-caco-2-cells-infected-by-salmonella-enteritidis
#6
Yuanyang Nie, Mei Cao, Daoyan Wu, Ningzhe Li, Jingshan Peng, Sijun Yi, Xiaofan Yang, Mao Zhang, Guoku Hu, Jian Zhao
Salmonella enteritidis infection occurs in enterogenous diseases, such as gastroenteritis and parenteral focal infection, which often involve inflammation of intestinal epithelial cells. The nuclear factor kappa B (NF-κB) pathway participates in the innate immune response to many gram-negative pathogenic bacteria and initiates inflammation in epithelial cells. KH-type splicing regulatory protein (KSRP) is a multi-domain RNA-binding protein that recruits the exosome-containing mRNA degradation complex to mRNAs coding for inflammatory response factors...
May 4, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29687420/from-agro-industrial-wastes-to-single-cell-oils-a-step-towards-prospective-biorefinery
#7
REVIEW
Batul Diwan, Piyush Parkhey, Pratima Gupta
The reserves of fossil-based fuels, which currently seem sufficient to meet the global demands, is inevitably on the verge of exhaustion. Contemporary raw material for alternate fuel like biodiesel is usually edible plant commodity oils, whose increasing public consumption rate raises the need of finding a non-edible and fungible alternate oil source. In this quest, single cell oils (SCO) from oleaginous yeasts and fungi can provide a sustainable alternate of not only functional but also valuable (polyunsaturated fatty acids (PUFA)-rich) lipids...
April 23, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29680913/monitoring-of-resistance-genes-in-listeria-monocytogenes-isolates-and-their-presence-in-the-extracellular-dna-of-biofilms-a-case-study-from-the-czech-republic
#8
Martina Boháčová, Kamila Zdeňková, Zuzana Tomáštíková, Viviana Fuchsová, Kateřina Demnerová, Renáta Karpíšková, Jarmila Pazlarová
The alarming occurrence of antibiotic resistance genes in food production demands continuous monitoring worldwide. One reservoir of resistance genes is thought to be eDNA. There is currently little available information in Europe about either the extracellular DNA distribution of the bacterium or the spread of resistance genes in L. monocytogenes. Therefore, our aims were to give insight into the Listeria monocytogenes resistance situation in the Czech Republic and assess the presence of resistance genes in their extracellular DNA (eDNA)...
April 21, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29663126/antibiotic-resistance-profiles-of-coagulase-positive-and-coagulase-negative-staphylococci-from-pit-latrine-fecal-sludge-in-a-peri-urban-south-african-community
#9
Lorika S Beukes, Stefan Schmidt
The aim of this study was to assess pit latrine samples from a peri-urban community in KwaZulu-Natal (South Africa) for the presence of multidrug-resistant (MDR) Staphylococcus spp. Standard procedures were used to isolate Staphylococcus spp. from pit latrine fecal sludge samples, with confirmation at genus level by polymerase chain reaction (PCR). Sixty-eight randomly selected pit latrine Staphylococcus spp. isolates were further characterized by using established disk diffusion procedures. An average Staphylococcus spp...
April 16, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29644511/virulence-associated-genes-and-antibiotic-susceptibility-among-vaginal-and-rectal-escherichia-coli-isolates-from-healthy-pregnant-women-in-poland
#10
Agnieszka Kaczmarek, Krzysztof Skowron, Anna Budzyńska, Eugenia Gospodarek-Komkowska
Vaginal and/or rectal Escherichia coli colonization of pregnant women is sometimes associated with neonatal infections. Despite the relevance of these strains, they have been rarely described before. Thus, the aim of this study was to compare vaginal (VEC) and rectal E. coli (REC) isolates in respect of antimicrobial susceptibility and the frequency of virulence-associated genes (VAGs). The antimicrobial susceptibility of 50 VEC and 50 REC isolates was performed by using the disc diffusion method, and VAGs were detected by PCR...
April 12, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29644510/a-raman-spectroscopy-based-approach-for-detection-and-discrimination-of-streptococcus-thermophilus-and-lactobacillus-bulgaricus-phages-at-low-titer-in-raw-milk
#11
Emine Kübra Tayyarcan, Esra Acar Soykut, Ismail Hakki Boyaci
In this study, a method combining Raman spectroscopy with chemometric analysis was developed for detection of phage presence in raw milk and discrimination of Streptococcus thermophilus and Lactobacillus bulgaricus phages which are among the main phages causing problems in dairy industry. For this purpose, S. thermophilus and L. bulgaricus phages were added into raw milk separately, and then some pretreatments such as fat separation, removal of casein, and filtration were applied to the raw milk samples. Raman spectra of the samples were collected and then analyzed using principal component analysis in order to discriminate these phages in raw milk...
April 11, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29603054/autolytic-hydrolases-affect-sexual-and-asexual-development-of-aspergillus-nidulans
#12
Tamás Emri, Viktória Vékony, Barnabás Gila, Flóra Nagy, Katalin Forgács, István Pócsi
Radial growth, asexual sporulation, and cleistothecia formation as well as extracellular chitinase and proteinase formation of Aspergillus nidulans were monitored in surface cultures in order to study the physiological role of extracellular hydrolase production in carbon-stressed cultures. We set up carbon-stressed and carbon-overfed experimental conditions by varying the starting glucose concentration within the range of 2.5 and 40 g/L. Glucose starvation induced radial growth and hydrolase production and enhanced the maturation of cleistothecia; meanwhile, glucose-rich conditions enhanced mycelial biomass, conidia, and cleistothecia production...
March 30, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29594949/characterization-of-multiple-antibiotic-resistant-clinical-strains-of-staphylococcus-isolated-from-pregnant-women-vagina
#13
Bakwena Ashton Hetsa, Ajay Kumar, Collins Njie Ateba
Vagina which is one of the important reservoirs for Staphylococcus and in pregnant women pathogenic strains may infect the child during the birth or by vertical transmission. A total of 68 presumptive Staphylococcus strains isolated from human vagina were found to be gram-positive cocci, and only 32 (47%) isolates were found beta-hemolytic. Matrix-assisted laser desorption/ionization time-of-flight mass-spectrometry (MALDI-TOF MS) results confirmed 33 isolates belonged to Staphylococcus which consisting of 6 species, i...
March 29, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29550921/genotyping-of-mycobacterium-tuberculosis-using-whole-genome-sequencing
#14
REVIEW
Jana Amlerova, Ibrahim Bitar, Jaroslav Hrabak
Tuberculosis (TB) is considered one of the most serious infectious diseases worldwide. Effective control of tuberculosis infection involves multiple steps, such as reliable detection, treatment, an epidemiological control as a part of case management, and further surveillance and monitoring of TB spread in the human population. Due to the accelerating advances in molecular biology, especially in DNA sequencing, in the past decade, the application of these methods has become crucial for TB evolution studies, differentiation of Mycobacterium tuberculosis genotypes, and their distribution...
March 17, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29546616/the-absence-or-presence-of-a-lytic-coliphage-affects-the-response-of-escherichia-coli-to-heat-chlorine-or-uv-exposure
#15
Ekwu M Ameh, Sean Tyrrel, Jim Harris, Athanasios Ignatiou, Elena Orlova, Andreas Nocker
Disinfection aims at maximal inactivation of target organisms and the sustainable suppression of their regrowth. Whereas many disinfection efforts achieve efficient inactivation when the effect is measured directly after treatment, there are questions about the sustainability of this effect. One aspect is that the treated bacteria might recover and regain the ability to grow. In an environmental context, another question is how amenable surviving bacteria are to predation by omnipresent bacteriophages. Provisional data suggested that bacteria when subjected to sublethal heat stress might develop a phage-resistant phenotype...
March 15, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29532421/unusual-oral-mucosal-microbiota-after-hematopoietic-cell-transplantation-with-glycopeptide-antibiotics-potential-association-with-pathophysiology-of-oral-mucositis
#16
Misato Muro, Yoshihiko Soga, Tomoko Higuchi, Kota Kataoka, Daisuke Ekuni, Yoshinobu Maeda, Manabu Morita
Severe oral mucositis occurs frequently in patients receiving hematopoietic stem cell transplantation (HCT). Oral mucosal bacteria can be associated with progression of oral mucositis, and systemic infection may occur via ulcerative oral mucositis. However, little information is available regarding the oral microbiota after HCT. Here, PCR-denaturing gradient gel electrophoresis (DGGE) was performed to characterize the oral mucosal microbiota, which can be affected by antibiotics, before and after HCT. Sixty reduced-intensity HCT patients were enrolled...
March 12, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29532420/detection-of-streptococcus-pyogenes-virulence-genes-in-streptococcus-dysgalactiae-subsp-equisimilis-from-vellore-india
#17
Anshu Babbar, Andreas Itzek, Dietmar H Pieper, D Patric Nitsche-Schmitz
Streptococcus dysgalactiae subsp. equisimilis (SDSE), belonging to the group C and G streptococci, are human pathogens reported to cause clinical manifestations similar to infections caused by Streptococcus pyogenes. To scrutinize the distribution of gene coding for S. pyogenes virulence factors in SDSE, 255 isolates were collected from humans infected with SDSE in Vellore, a region in southern India, with high incidence of SDSE infections. Initial evaluation indicated SDSE isolates comprising of 82.35% group G and 17...
March 12, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29524153/small-mammals-as-sentinels-of-antimicrobial-resistant-staphylococci
#18
Vladimír Kmeť, Anna Čuvalová, Michal Stanko
A total of 39 coagulase-negative staphylococci and seven Staphylococcus aureus strains were isolated from small mammal feces, i.e., the striped field mouse (Apodemus agrarius) and the yellow-necked mouse (A. flavicollis) in two sampling areas, deciduous forest and karst plains. MALDI-TOF analysis revealed five species of coagulase-negative staphylococci: S. sciuri, S. hominis, S. warneri, S. haemolyticus, and S. xylosus. All strains were susceptible to tetracycline, linezolid, vancomycin, and teicoplanin. Three MRSA strains with the mecA gene were detected...
March 9, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29524152/difficulties-in-identifying-the-bacterial-species-from-the-genus-clostridium-in-a-case-of-injury-related-osteitis
#19
REVIEW
Marta Kierzkowska, Piotr Pędzisz, Ireneusz Babiak, Jakub Janowicz, Mateusz Kulig, Anna Majewska, Anna Sawicka-Grzelak, Grażyna Młynarczyk
Most Clostridium species are part of saprophytic microflora in humans and animals; however, some are well-known human pathogens. We presented the challenges in identifying the Clostridium species isolated from a patient with an infected open dislocation of the proximal interphalangeal joint of the fourth digit of the right hand. The clinical materials were intraoperative samples collected from a patient diagnosed with an injury-related infection, with soft tissue loss and tendon sheath involvement. The available biochemical, molecular, and genetic techniques were used in identifying the isolated bacteria...
March 9, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29508232/rare-case-of-osteomyelitis-of-tibial-shaft-caused-by-nocardia-cyriacigeorgica
#20
D Raszka, S Popelka, J Heřt, D Jahoda, I Landor, P Vavřík
Nocardiosis is a rare infection caused by the aerobic actinomycete of the Nocardia genus. In most cases, nocardiosis manifests as a lung infection or a bone lesion. Due to the nonspecific and mild clinical manifestations of nocardiosis, the establishment of definite diagnosis can be difficult. When antibiotic therapy is incorrectly targeted, only the symptoms of the disease are suppressed. The mainstay in the treatment of Nocardia osteomyelitis has so far been the combined surgical debridement with long-term, initially intravenous, antibiotic administration...
March 5, 2018: Folia Microbiologica
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