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Folia Microbiologica

Young Min Lee, Hanbyul Lee, Young Mok Heo, Hwanhwi Lee, Joo-Hyun Hong, Jae-Jin Kim
The present study was conducted to determine the gene responsible for beta-glucosidase (BGL) production and to generate a full-length complementary DNA (cDNA) of one of the putative BGL genes, which showed a significant expression level when Schizophyllum commune KUC9397 was grown in optimized medium. The relative expression levels of seven genes encoding BGL of S. commune KUC9397 were determined with real-time quantitative reverse transcription PCR in cellulose-containing optimized medium (OM) compared to glucose-containing basal medium (BM)...
November 30, 2016: Folia Microbiologica
Mayra Alejandra Gómez-Govea, Santos García, Norma Heredia
Bacterial metabolites with communicative functions could provide protection against stress conditions to members of the same species. Yet, information remains limited about protection provided by metabolites in Bacillus cereus and inter-species. This study investigated the effect of extracellular compounds derived from heat shocked (HS) and non-HS cultures of B. cereus and Geobacillus stearothermophilus on the thermotolerance of non-HS vegetative and sporulating B. cereus. Cultures of B. cereus and G. stearothermophilus were subjected to HS (42 or 65 °C respectively for 30 min) or non-HS treatments...
November 28, 2016: Folia Microbiologica
Yun-Hee Song, Kyung-Tai Lee, Jin-Young Baek, Min-Ju Kim, Mi-Ra Kwon, Young-Joo Kim, Mi-Rim Park, Haesu Ko, Jin-Sung Lee, Keun-Sung Kim
This study aimed to isolate and characterize a novel cellulolytic enzyme from black goat rumen by using a culture-independent approach. A metagenomic fosmid library was constructed from black goat rumen contents and screened for a novel cellulase. The KG37 gene encoding a protein of 858 amino acid residues (92.7 kDa) was isolated. The deduced protein contained a glycosyl hydrolase family 74 (GH74) domain and showed 77% sequence identity to two endo-1,4-β-glucanases from Fibrobacter succinogenes. The novel GH74 cellulase gene was overexpressed in Escherichia coli, and its protein product was functionally characterized...
November 19, 2016: Folia Microbiologica
Rafaelle Fonseca de Matos, Lúcia Carla Vasconcelos Mendonça, Kaira Geiliane da Silva Souza, Adriana Aparecida Durães Fonseca, Elaine Mirla Souza Costa, Marcus Vinicius Dias de Lima, José Maria Dos Santos Vieira, Mioni Thielli Figueiredo Magalhães de Brito, Marta Chagas Monteiro
Certain non-steroidal anti-inflammatory drugs can inhibit fungal growth, fungal prostaglandin E2 production, and enzyme activation. This study aims to investigate the antifungal effect of nimesulide against pathogenic filamentous fungi and yeast. The experiments detailed below were also designed to investigate whether the action is dependent on E2 fungal prostaglandins. Our data showed that nimesulide exhibited potent antifungal activity, mainly against Trichophyton mentagrophytes (ATCC 9533) and Cryptococcus neoformans with MIC values of 2 and 62 μg/mL, respectively...
November 19, 2016: Folia Microbiologica
Seung-Gyun Woo, So-Yeon Lee, So-Min Lee, Kyoung-Hee Lim, Eun-Ju Ha, Yong-Bin Eom
Staphylococcus aureus is one of the most important pathogens causing chronic biofilm infections. These are becoming more difficult to treat owing to drug resistance, particularly because S. aureus biofilms limit the efficacy of antimicrobial agents, leading to high morbidity and mortality. In the present study, we screened for inhibitors of S. aureus biofilm formation using a natural product library from the Korea Chemical Bank (KCB). Screening by crystal violet-based biomass staining assay identified hit compounds...
November 18, 2016: Folia Microbiologica
Daniele Zendrini Rechenchoski, Ligia Carla Faccin-Galhardi, Rosa Elisa Carvalho Linhares, Carlos Nozawa
Herpes simplex virus (HSV) infections are common and widespread; nevertheless, their outcome can be of unpredictable prognosis in neonates and in immunosuppressed patients. Anti-HSV therapy is effective, but the emergence of drug-resistant strains or the drug toxicity that hamper the treatment is of great concern. Vaccine has not yet shown relevant benefit; therefore, palliative prophylactic measures have been adopted to prevent diseases. This short review proposes to present concisely the history of HSV, its taxonomy, physical structure, and replication and to explore the pathogenesis of the infection, clinical manifestations, laboratory diagnosis, treatment, prophylaxis and epidemiology of the diseases...
November 17, 2016: Folia Microbiologica
Alexandra Tabaran, Marian Mihaiu, Flaviu Tăbăran, Liora Colobatiu, Oana Reget, Mihai Marian Borzan, Sorin Daniel Dan
The study focused on the incidence of enterotoxigenic Escherichia coli (ETEC) and verotoxigenic E. coli (VTEC) in raw milk and traditional dairy cheeses marketed in Romania, characterizing the virulence and antibiotic resistance genes of these isolates. One hundred and twenty samples of raw milk and 80 samples of unpasteurized telemy cheese were collected and cultured according to the international standard protocol. All the characteristic E. coli cultures were analyzed for the presence of STa, STb, LT, stx1, and stx2 toxicity genes...
November 11, 2016: Folia Microbiologica
Fernanda Morcatti Coura, Soraia de Araújo Diniz, Jamili Maria Suhet Mussi, Marcos Xavier Silva, Andrey Pereira Lage, Marcos Bryan Heinemann
This study aimed to detect virulence factors, pathovars, and phylogenetic groups of Escherichia coli strains obtained from feces of calves with and without diarrhea up to 70 days old and to determine the association between occurrence of diarrhea, phylogenetic groups, and pathovars. Phylo-typing analysis of the 336 E. coli strains isolated from calves with Clermont method showed that 21 (6.25 %) belong to phylogroup A, 228 (67.85 %) to phylogroup B1, 2 (0.6 %) to phylogroup B2, 5 (1.49 %) to phylogroup C, 57 (16...
October 27, 2016: Folia Microbiologica
Sudip Regmi, Yun Hee Choi, Yoon Seok Choi, Mi Ri Kim, Jin Cheol Yoo
The present study was performed to evaluate the antibacterial activities of an antimicrobial peptide (CSpK14) and the synergies thereof with β-lactams against vancomycin-resistant Staphylococcus aureus (VRSA) and Enterococci (VRE). Our strain was isolated from fermented food (kimchi), which is 99.79 % homologous with Bacillus amyloliquefaciens subsp. plantarum FZB42(T). CSpK14 was purified to homogeneity by diammonium sulfate precipitation, concentration, dialysis, and followed by two-stage chromatographic separation, i...
October 27, 2016: Folia Microbiologica
Michael M Petrov, Atanaska Petrova, Irina Stanimirova, Marina Mircheva-Topalova, Lalka Koycheva, Rayna Velcheva, Mariana Stoycheva-Vartigova, Ralitsa Raycheva, Galina Asseva, Petar Petrov, Velichka Kardjeva, Marianna Murdjeva
The aim of this work is to study the epidemiology and antimicrobial resistance to the most commonly used antibiotics for the treatment of acute gastroenteritis caused by Salmonella and Shigella at the largest Bulgarian hospital-University Hospital "St. George," Plovdiv-for the period 2009-2013. Two hundred ninety strains were in vitro tested for resistance to 15 antimicrobial agents. The presence of extended-spectrum beta-lactamases (ESBLs) was demonstrated by a variety of specialized tests. For comparison, a collection of 28 strains submitted by the National Reference Laboratory (NRL) "Enteric Infections" at the National Center of Infectious and Parasitic Diseases (NCIPD), Sofia, was also tested for the production of ESBLs...
October 19, 2016: Folia Microbiologica
María Guadalupe Frías-De-León, José Antonio Ramírez-Bárcenas, Gabriela Rodríguez-Arellanes, Oscar Velasco-Castrejón, Maria Lucia Taylor, María Del Rocío Reyes-Montes
Histoplasmosis is considered the most important systemic mycosis in Mexico, and its diagnosis requires fast and reliable methodologies. The present study evaluated the usefulness of PCR using Hcp100 and 1281-1283(220) molecular markers in detecting Histoplasma capsulatum in occupational and recreational outbreaks. Seven clinical serum samples of infected individuals from three different histoplasmosis outbreaks were processed by enzyme-linked immunosorbent assay (ELISA) to titre anti-H. capsulatum antibodies and to extract DNA...
October 10, 2016: Folia Microbiologica
Sonika Sharma, Soumya Chatterjee, Sibnarayan Datta, Rishika Prasad, Dharmendra Dubey, Rajesh Kumar Prasad, Mohan G Vairale
Bacteriophages (or phages), the most abundant viral entity of the planet, are omni-present in all the ecosystems. On the basis of their unique characteristics and anti-bacterial property, phages are being freshly evaluated taxonomically. Phages replicate inside the host either by lytic or lysogenic mode after infecting and using the cellular machinery of a bacterium. Since their discovery by Twort and d'Herelle in the early 1900s, phage became an important agent for combating pathogenic bacteria in clinical treatments and its related research gained momentum...
October 8, 2016: Folia Microbiologica
M Salehi, S A Esmailzadeh Hosseini, E Salehi, A Bertaccini
During 2010-14 surveys in the major sesame growing areas of Fars, Yazd and Isfahan provinces (Iran), genetic diversity and vector transmission of phytoplasmas associated with sesame phyllody were studied. Virtual RFLP, phylogenetic, and DNA homology analyses of partial 16S ribosomal sequences of phytoplasma strains associated with symptomatic plants revealed the presence of phytoplasmas referable to three ribosomal subgroups, 16SrII-D, 16SrVI-A, and 16SrIX-C. The same analyses using 16S rDNA sequences from sesame phyllody-associated phytoplasmas retrieved from GenBank database showed the presence of phytoplasmas clustering with strains in the same subgroups in other Iranian provinces including Bushehr and Khorasan Razavi...
October 8, 2016: Folia Microbiologica
Zora Melkova, Prakash Shankaran, Michaela Madlenakova, Josef Bodor
HIV-1 infection cannot be cured as it persists in latently infected cells that are targeted neither by the immune system nor by available therapeutic approaches. Consequently, a lifelong therapy suppressing only the actively replicating virus is necessary. The latent reservoir has been defined and characterized in various experimental models and in human patients, allowing research and development of approaches targeting individual steps critical for HIV-1 latency establishment, maintenance, and reactivation...
October 5, 2016: Folia Microbiologica
Karaffová V, Marcinková E, Bobíková K, Herich R, Revajová V, Stašová D, Kavuľová A, Levkutová M, Levkut M, Lauková A, Ševčíková Z, Levkut M
The protective effect of Enterococcus faecium EFAL41 on chicken's caecum in relation to the TLR (TLR4 and TLR21) activation and production of luminal IgA challenged with Campylobacter jejuni CCM6191 was assessed. The activation of MIF, IFN-β, MD-2 and CD14 was followed-up after bacterial infection. Day-old chicks (40) were divided into four groups (n = 10): control (C), E. faecium AL41 (EFAL41), C. jejuni (CJ) and combined E. faecium AL41+C. jejuni (EFAL41+CJ). Relative mRNA expression of TLR4, TLR21 and CD14 was upregulated in the probiotic strain and infected (combined) group on day 4 and 7 post infection (p...
October 3, 2016: Folia Microbiologica
Milán Farkas, Sándor Szoboszlay, Tibor Benedek, Fruzsina Révész, Péter Gábor Veres, Balázs Kriszt, András Táncsics
Dissimilatory iron-reducing bacteria are commonly found in microbial communities of aromatic hydrocarbon-contaminated subsurface environments where they often play key role in the degradation of the contaminants. The Siklós benzene, toluene, ethylbenzene, and xylene (BTEX)-contaminated area is one of the best characterized petroleum hydrocarbon-contaminated sites of Hungary. Continuous monitoring of the microbial community in the center of the contaminant plume indicated the presence of an emerging Geobacter population and a Rhodoferax phylotype highly associated with aromatic hydrocarbon-contaminated subsurface environments...
September 28, 2016: Folia Microbiologica
Nannan Zhang, Fangxia Guan, Yanting Zhang, Qinghua Li, Yao Xu, Lu Yang, Xiangzhan Zhu, Mingzhi Zhang
Ring box protein-1 (RBX1), also called Regulator of Cullins-1 (ROC1), is a key component of SCF (Skp-1, cullins, F-box proteins) E3 ubiquitin ligases, which regulate diverse cellular processes by targeting protein substrates for degradation. Although RBX1 plays an important role in ubiquitination machinery of both prokaryotes and eukaryotes, studies on the RBX1 have not been involved in the unicellular green alga Dunaliella salina. In this study, a full-length RBX1 cDNA fragment of 817 bp was cloned using rapid amplification of cDNA end (RACE) technique...
September 22, 2016: Folia Microbiologica
Vladislav Raclavsky, Radko Novotny, Lubomir Stary, Lucie Navratilova, Jaromir Zatloukal, Petr Jakubec, Martin Zapalka, Frantisek Kopriva, Vitezslav Kolek
Streptococcus milleri group (SMG) is a group of three streptococcal species (S. anginosus, intermedius and constellatus) that act as opportunist pathogens, among others in cystic fibrosis. Due to their fastidious character, they are both difficult to cultivate and to differentiate from less pathogenic streptococcal species, therefore being most probably underdiagnosed. Semi-selective McKay agar and NAS agar were developed to facilitate SMG recovery from clinical samples; however, direct comparison of recovery rates has not been published yet...
September 16, 2016: Folia Microbiologica
Pavla Pantuckova, Michaela Bartosova, Zdenek Broukal, Martina Kukletova, Lydie Izakovicova Holla
The aim of this study was to compare the detection frequency of periodontal bacteria in dental plaque in children with early childhood caries (ECC) with and without gingival inflammation. A convenience sample of 25 preschool children (mean age 3.61 years, SD 1.42) was recruited. Dental plaque was taken from periodontal areas with and without visible signs of inflammation and processed using the StomaGene® (Protean s.r.o. Czech Republic) and ParoCheck® 20 (Greiner Bio-one GmbH, Germany) detection kits. The two sample t tests between percents for differences between inflammatory and healthy sites and kappa statistics for the agreement of both systems were used...
November 2016: Folia Microbiologica
A Sękowska, T Fabiszak, A Mikucka, M Andrzejewska, E Kruszyńska, E Gospodarek, J Klawe
Campylobacter spp. are Gram-negative, spiral motile bacteria. Infections caused by Campylobacter fetus are frequently of invasive character, but they are very rare. The described case of infection of a cardioverter defibrillator implantation site was effectively cured with antibiotics, but it required removal of the cardioverter defibrillator.
November 2016: Folia Microbiologica
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