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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
Carlos I Briones-Roblero, Roberto Rodríguez-Díaz, José A Santiago-Cruz, Gerardo Zúñiga, Flor N Rivera-Orduña
Bark beetles (Curculionidae: Scolytinae) feed on the xylem and phloem of their host, which are composed of structural carbohydrates and organic compounds that are not easily degraded by the insects. Some of these compounds might be hydrolyzed by digestive enzymes produced by microbes present in the gut of these insects. In this study, we evaluated the enzymatic capacity of bacteria (Acinetobacter lwoffii, Arthrobacter sp., Pseudomonas putida, Pseudomonas azotoformans, and Rahnella sp.) and yeasts (Candida piceae, Candida oregonensis, Cyberlindnera americana, Zygoascus sp...
August 20, 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
Tulin Demir, Selcuk Kilic
Zika virus (ZIKV) is a single-stranded RNA virus in the Flaviviridae family and transmitted to human through infected mosquitos (Aedes aegypti and Aedes albopictus). Virus is closely related with other flaviviruses; dengue virus, yellow fever virus, West Nile virus, and Japanese encephalitis virus phylogenetically. Due to the possible relationship between virus and clinical features including microcephaly, ventricule, and eye deformities, Guillain-Barre syndrome increases the interest on this virus gradually...
November 2016: Folia Microbiologica
Rúbia Carvalho Gomes Corrêa, Bruna Polacchini da Silva, Rafael Castoldi, Camila Gabriel Kato, Anacharis Babeto de Sá-Nakanishi, Rosely Aparecida Peralta, Cristina G M de Souza, Adelar Bracht, Rosane Marina Peralta
Pleurotus pulmonarius was cultivated on a corncob-based substrate for producing of mushrooms and for assessing the transformation of the lignocellulosics during the development of fungal biomass. Associated events, such as the release of relevant enzymes and the H2O2 generation, were also monitored. The peaks of laccase and catalase activities occurred at the 5th day and that of Mn peroxidase at the 30th day, simultaneously with a high activity of superoxide dismutase. Increase in the endocellulase and xylanase activities was observed after 10 days, with maximal activities achieved during the 20-30-day period...
September 2016: Folia Microbiologica
Irena Kolouchová, Olga Maťátková, Karel Sigler, Jan Masák, Tomáš Řezanka
We investigated the possibility of utilizing both oleaginous yeast species accumulating large amounts of lipids (Yarrowia lipolytica, Rhodotorula glutinis, Trichosporon cutaneum, Candida sp.) and traditional biotechnological non-oleaginous ones characterized by high biomass yield (Kluyveromyces polysporus, Torulaspora delbrueckii, Saccharomyces cerevisiae) as potential producers of biofuel-utilizable and nutritionally valuable lipids. The main objective was to increase lipid accumulation by increasing C/P ratio together with higher C/N ratio, while maintaining high biomass yield...
September 2016: Folia Microbiologica
Vlasta Merglova, Pavel Polenik
The colonization of the oral cavity by cariogenic and periodontal pathogens occurs earlier than previously thought. This study aimed to identify the presence and quantity of representative cariogenic and periodontal pathogens in the oral cavities of 6- and 12-month olds and to evaluate the influence of C-section delivery on early Streptococcus mutans (Sm) colonization of the oral cavity. The research cohort was composed of 59 infants (35 infants were delivered vaginally and 24 via C-section) and their mothers...
September 2016: Folia Microbiologica
Jirina Josefiova, Martin Pospisek, Daniel Vanek
Persteril 36 is a disinfectant with a broad spectrum of antimicrobial activity. Because of its bactericidal, virucidal, fungicidal, and sporicidal effectiveness, it is used as a disinfectant against biological warfare agents in the emergency and army services. In case of an attack with potentially harmful biological agents, a person's gear or afflicted skin is sprayed with a diluted solution of Persteril 36 as a precaution. Subsequently, the remains of the biological agents are analyzed. However, the question remains concerning whether DNA can be successfully analyzed from Persteril 36-treated dead bacterial cells...
September 2016: Folia Microbiologica
Filippo Fratini, Barbara Turchi, Martina Ferrone, Alessia Galiero, Roberta Nuvoloni, Beatrice Torracca, Domenico Cerri
The consumption of raw milk is currently increasing due to several beneficial aspects, such as nutritional qualities, taste, and health benefits. However, some authors highlight the potential risk associated with raw milk consumption. In Italy, while the absence of some pathogen microorganisms is set by the regional regulation DGR 381/2007, for other microorganisms, such as Leptospira, no recommendations are provided. Leptospira is not ascribed among classical milk pathogens; however, it can potentially be present in raw milk...
September 2016: Folia Microbiologica
Jörn-Peter Wickhorst, Abdulwahed Ahmed Hassan, Osama Sammra, Reglindis Huber-Schlenstedt, Christoph Lämmler, Ellen Prenger-Berninghoff, Markus Timke, Amir Abdulmawjood
In the present study, three Arcanobacterium pluranimalium strains isolated from bovine milk samples of three cows of three farms (two cows with subclinical mastitis) could successfully be identified by phenotypical investigations, by matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) analysis and genotypically by sequencing the molecular targets 16S rDNA, 16S-23S rDNA intergenic spacer region (ISR), the β subunit of bacterial RNA polymerase encoding gene rpoB, the glyceraldehyde 3-phosphate dehydrogenase encoding gene gap, the elongation factor tu encoding gene tuf, and the pluranimaliumlysin encoding gene pla...
September 2016: Folia Microbiologica
Luana Rossato, Érico S Loreto, Régis A Zanette, Francieli Chassot, Janio M Santurio, Sydney H Alves
Cryptococcus neoformans is encapsulated yeast that causes cryptococcosis. The cryptococcal meningitis may cause neuropsychiatric symptoms. Here, we evaluated the in vitro activity of amphotericin B (AMB), chlorpromazine (CLOR), and sertraline (SERT) alone or in combination against clinical isolates of C. neoformans considering the capsular induction in vitro. Susceptibility tests were carried out using the broth microdilution method in accordance with the CLSI document M27-A3. The combination [CLOR + AMB] exhibited synergism for 50 and 67 % of strains before capsular induction (group I) and after capsular induction (group II), respectively...
September 2016: Folia Microbiologica
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