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Acta Microbiologica et Immunologica Hungarica

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https://www.readbyqxmd.com/read/29685054/analysis-of-antigen-conservation-and-inactivation-of-gamma-irradiated-avian-influenza-virus-subtype-h9n2
#1
Bahareh Salehi, Farahnaz Motamedi-Sedeh, Omid Madadgar, Iraj Khalili, Arash Ghalyan Chi Langroudi, Hermann Unger, Viskam Wijewardana
Avian influenza (AI) A subtype H9N2 virus belongs to Orthomyxoviridae family and causes low-pathogenic disease AI. The use of gamma-irradiated viral antigens has been developed in the production of effective vaccines. In this research, LPAIV H9N2 strain, A/Chicken/IRN/Ghazvin/2001, was multiplied on SPF eggs and irradiated by a Nordian gamma cell instrument. Irradiated and non-irradiated AI virus (AIV) samples were titrated by EID50 method and hemagglutinin (HA) antigen was analyzed by HA test as the WHO pattern method...
April 24, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29685049/influence-of-subinhibitory-antibiotic-concentration-on-streptococcus-pyogenes-adherence-and-biofilm-production
#2
Aleksandra Šmitran, Dragana Vuković, Nataša Opavski, Ina Gajić, Jelena Marinković, Ljiljana Božić, Irena Živanović, Dušan Kekić, Sunčica Popović, Lazar Ranin
In this study, the focus was on the effects of sub-MICs of the antibiotics on adherence, hydrophobicity, and biofilm formation by two groups of Streptococcus pyogenes strains, which were responsible for different clinical cases. The aim of this study was to explore the effects of sub-MICs of penicillin, ceftriaxone, erythromycin, and clindamycin on adherence, surface hydrophobicity, and biofilm biomass in two selected collections of group A streptococcus (GAS): strains isolated from carriers (CA) and strains isolated from patients with tonsillopharyngitis (TPh)...
April 24, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29651861/the-first-characterized-carbapenem-resistant-bacteroides-fragilis-strain-from-croatia-and-the-case-study-for-it
#3
Maja Bogdan, Ljilijana Perić, Katalin Ördög, Dubravka Vuković, Edit Urbán, József Sóki
An imipenem-resistant Bacteroides fragilis strain was isolated from the blood of a 72-year-old male patient with a urinary bladder tumor in Osijek, Croatia. This strain was also resistant to ampicillin, piperacillin/tazobactam, cefoxitin, clindamycin, tetracycline, and harbored cfiA, ermF, and tetQ genes where the high-level expression of the cfiA carbapenem-resistant gene was driven by an IS1187 element. Interestingly, despite the carbapenem-resistant feature of the B. fragilis from blood, the patient relatively easily recovered from the bacteremia...
April 13, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29651860/risk-factors-for-clostridium-difficile-infections-in-baranya-county-southern-hungary
#4
Szabolcs Vigvári, Dávid Sipos, Ágnes Kappéter, Zsófia Feiszt, Beáta Kovács, Zoltán Péterfi
In the past decade, Clostridium difficile infections (CDIs) have become a major public health challenge. Their epidemiology has radically changed with a significant rise in the number of cases and an increase in severe episodes. Recurrence and failure of conventional treatments are very common. Furthermore, a spread of CDI has emerged in general population without the usual risk factors (unexposed to antibiotic treatment, young people, etc.). The conventional treatments (metronidazole and vancomycin) are still effective and are the first-line antibiotics with new recommendations...
April 13, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29651859/effect-of-amino-acid-substitution-in-new-delhi-metallo-%C3%AE-lactamase-on-carbapenem-susceptibility
#5
Azer Özad Düzgün
The aim of this work was investigation of clinically important amino acid substitutions of NDM-1 variants. A blaNDM-1 gene was cloned into expression vector pET100/D-TOPO. The sequence of NDM-1 variants with substituted amino acids was determined by ClustalW program. A pET100/D-TOPO + blaNDM-1 was used to generate the alanine mutations at different positions, such as NDM-2 (P28A), NDM-3 (D95A), NDM-4 (M154A), NDM-5 (V88A), NDM-7 (D130A), and NDM-9 (E152A). The mutant variants were transformed into Escherichia coli DH5α...
April 13, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29552899/specific-immune-responses-induced-by-multi-epitope-dna-derived-from-mycobacterium-tuberculosis-dosr-antigens
#6
Jale Moradi, Maryam Izad, Mina Tabrizi, Nader Mosavari, Behnaz Esmaeili, Mohammad Mehdi Feizabadi
One third of the world population are latently infected with Mycobacterium tuberculosis and are at the risk of reactivation of tuberculosis (TB). The most effective strategy for control of TB worldwide is the development of a vaccine that inhibits progression of latent TB to active infection. In this study, two optimized constructs consisting of multi-epitopes DNA derived from three latency antigens Rv2029c, Rv2031c, and Rv2627c fused with or without light chain 3 (LC3) are synthetized. The immunogenicity effectiveness of two DNA constructs was evaluated in the mouse model...
March 19, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29552898/antineoplastic-potential-of-mycotoxins
#7
István Pócsi, Gábor Király, Gáspár Bánfalvi
Fungal toxins are secondary metabolites, in which many of them were mycotoxins, affecting eukaryotic cells with a broad range of structural and functional variety contributing to the multitude of their classification. This refers to the harmful genotoxic (mutagenic, teratogenic, and carcinogenic) effects of mycotoxins on the one hand, and their cytocidic and antineoplastic properties on the other hand. This "double edged sword" effect could be utilized against the spread of tumors in older patients when the survival is much more important than the mutagenic side effects...
March 19, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29552897/gynecological-and-obstetrical-aspects-of-enterobius-vermicularis-infection
#8
Balázs Dezsényi, László Sárközi, László Kaiser, Klára Tárkányi, Radka Nikolova, Zorán Belics
Enterobiasis is an easily recognizable and treatable disease with higher incidence among children. Based on these facts, its clinical importance is usually underestimated. This infection also occurs during adulthood and without treatment, it can cause severe complications in some rare cases. Unnoticed subclinical infection in women can lead to infertility and even to life-threatening conditions. It is also emphasized in this paper that the treatment of identified enterobiasis during pregnancy needs caution...
March 19, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29512393/value-of-the-eazyplex-%C3%A2-csf-direct-assay-in-rapid-diagnosis-of-invasive-meningococcal-disease-case-report
#9
Matthias Karrasch, Sven Eisenach, Ulrich Vogel, Jan Zinke, Otto W Witte, Albrecht Günther, Bernd Romeike, Jürgen Rödel
There is a need for easy-to-use molecular assays for diagnosis of invasive meningococcal disease. Here, we report the rapid identification of Neisseria meningitidis in a cerebrospinal fluid sample from a patient with purulent meningitis using a commercially available loop-mediated isothermal amplification assay, resulting in a prompt de-escalation of the initial empiric antibiotic therapy.
March 7, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29512392/human-herpesvirus-6a-and-6b-and-nk-cells
#10
Roberta Rizzo, Dario Di Luca
Human herpesvirus 6 (HHV-6) comprises two viral species, HHV-6A and HHV-6B, closely related but differing for pathogenic and biological characteristics. Both viral species are predominantly lymphotropic, infecting T lymphocytes and other lymphoid cells, including natural killer (NK) cells. The interactions between HHV-6 and NK cells have been scarcely studied, but it has become clear that NK cells are not only crucial in immune protection during the early phases of infection, but also that HHV-6 infection can affect NK cell functions...
March 7, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29486574/the-three-amigos-lurking-behind-type-1-diabetes-hygiene-gut-microbiota-and-viruses
#11
Odin Andreas Johan Jakobsen, Laszlo Szereday
Incidence of type 1 diabetes (T1D) is on the rise and yet, despite decades of research, the exact ethology of the disease still remains a mystery. The autoimmune reaction, which ultimately leads to the destruction of pancreatic beta cells, causing insulin deficiency and T1D, is a result of genetic susceptibility and environmental factors. Precisely, what are these environmental factors? Current popular opinion implies these pathogens, such as viruses, especially human enteroviruses, are a triggering factor...
February 28, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29486573/epidemiological-situation-of-measles-in-romania-italy-and-hungary-on-what-threats-should-we-focus-nowadays
#12
László Orosz, Gábor Gáspár, Ágnes Rózsa, Nóra Rákos, Szilárd Sziveri, Tünde Bosnyákovits
Although the prevalence of wild-type measles virus infection has decreased by >90% in Europe, the disease is still not eliminated and has even reemerged with recurrent outbreaks in different countries, including Romania and Italy. Minor outbreaks of Romanian origin were reported from Hungary as well. In Romania, an outbreak has been ongoing since February 2016. As of October 2017, 9,670 measles cases and 35 deaths were registered in the country. The three most affected counties are located next to the Hungarian border...
February 28, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29471696/the-recombinant-fusion-protein-cfp10-esat6-difn-has-protective-effect-against-tuberculosis-in-guinea-pigs
#13
Natalya V Permyakova, Pavel A Belavin, Dariya S Pirozhkova, Elena G Ufimtseva, Sergey M Rozov, Sergey R Mursalimov, Yuriy V Sidorchuk, Elena A Uvarova, Alla A Zagorskaya, Tatiana V Marenkova, Svetlana V Bannikova, Evgeniy A Demidov, Konstantin V Starostin, Marionella A Kravchenko, Diana V Vakhrusheva, Roman B Berdnikov, Natalya I Eremeeva, Sergey N Skornyakov, Sergey E Peltek, Elena V Deineko
Development of effective vaccine candidates against tuberculosis is currently the most important challenge in the prevention of this disease since the BCG vaccine fails to guarantee a lifelong protection, while any other approved vaccine with better efficiency is still absent. The protective effect of the recombinant fusion protein ESAT6-CFP10-dIFN produced in a prokaryotic expression system (Escherichia coli) has been assessed in a guinea pig model of acute tuberculosis. The tested antigen comprises the Mycobacterium tuberculosis (Mtb) proteins ESAT6 and CFP10 as well as modified human γ-interferon (dIFN) for boosting the immune response...
February 23, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29471695/a-rarely-isolated-gram-negative-bacterium-in-microbiology-laboratories-leclercia-adecarboxylata-%C3%A2
#14
Muharrem Çiçek, Özlem Tuncer, Asiye Biçakçigil, Nafia Canan Gürsoy, Barış Otlu, Banu Sancak
No abstract text is available yet for this article.
February 23, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29471694/assessing-the-microbial-communities-inhabiting-drinking-water-networks-and-nitrifying-enrichments-with-special-respect-on-nitrifying-microorganisms
#15
Zsuzsanna Nagymáté, Katalin Nemes-Barnás, Gergely Krett, Károly Márialigeti
This study provides a comprehensive microbiological survey of three drinking water networks applying different water treatment processes. Variability of microbial communities was assessed by cultivation-based [nitrifying, denitrifying most probable number (MPN) heterotrophic plate count] and sequence-aided terminal restriction fragment length polymorphism (T-RFLP) analysis. The effect of microbial community composition on nitrifying MPN values was revealed. The non-treated well water samples showed remarkable differences to their corresponding distribution systems regarding low plate count, nitrifying MPN, and the composition of microbial communities, which increased and changed, respectively, in distribution systems...
February 23, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29471692/bacterial-diversity-in-soils-of-different-hungarian-karst-areas
#16
Mónika Knáb, Tibor Szili-Kovács, Károly Márialigeti, János Móga, Andrea K Borsodi
Karst areas have great environmental importance as sources of subsurface water and often maintain very sensitive ecosystems. In recent years, increasing number of microbiological studies focused on the bacterial communities of karst soils. In this study, diversity examinations on two distinct Hungarian karst areas, Aggtelek and Tapolca, were performed using parallel cultivation and molecular cloning methods. The phylogenetic affiliation of bacterial strains and molecular clones was determined based on their 16S rRNA gene sequences...
February 23, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29471691/streptococcus-pneumoniae-quorum-sensing-and-biofilm-formation-are-affected-by-thymus-daenensis-satureja-hortensis-and-origanum-vulgare-essential-oils
#17
Aram Sharifi, Ali Ahmadi, Abdolmajid Mohammadzadeh
The aim of this study was to investigate the effect of Thymus daenensis L., Satureja hortensis L., and Origanum vulgare L. essential oils (EOs) on the planktonic growth, biofilm formation, quorum sensing (QS), and competence system (CS) of Streptococcus pneumoniae. The anti-biofilm activity of EOs was determined by Microtiter-Plate Test (MtP) and scanning electron microscope (SEM). The QS and CS inhibitory activities were determined on the pre-grown biofilm by gene expression analysis using quantitative real-time RT-PCR...
February 23, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29471690/genetic-support-of-carbapenemases-in-double-carbapenemase-producer-klebsiella-pneumoniae-isolated-in-the-arabian-peninsula
#18
Amna E Al-Baloushi, Tibor Pál, Akela Ghazawi, Agnes Sonnevend
Enterobacteriaceae co-producing NDM- and OXA-48-type carbapenemases were encountered in higher frequency in the United Arab Emirates (UAE) than in the neighboring countries in our earlier study. The aim of this investigation was to characterize the seven double carbapenemase producer Klebsiella pneumoniae found in the region to assess factors contributing to their emergence. Three K. pneumoniae ST14 isolated in the UAE harboring blaNDM-1 on IncHI1b and blaOXA-232 on IncColE plasmids were clonally related. Furthermore, two K...
February 23, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29471689/mediation-of-inflammatory-ascites-formation-induced-by-macromolecules-in-mice
#19
Károly Baintner
The first 60-min phase of inflammatory ascites formation was studied by intraperitoneally (i.p.) administered macromolecular inducers: yeast cell wall zymosan binds to specific macrophage receptors, polyethyleneimine (PEI) and concanavalin A (ConA), produces non-covalent cross-links on the surface of various cells, while λ-carrageenan may function as a contact activator. Depletion of peritoneal macrophages was performed by overnight pretreatment with diphtheria toxin in transgenic mice, resulting in a significant (p < 0...
February 23, 2018: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/29471688/plasmid-mediated-quinolone-resistance-determinants-in-enterobacteriaceae-from-urine-clinical-samples
#20
Orsolya Szabó, Dániel Gulyás, Nikolett Szabó, Katalin Kristóf, Béla Kocsis, Dóra Szabó
Plasmid-mediated quinolone resistance (PMQR) determinants including, qnrA, qnrB, qnrC, qnrD, qnrS, aac(6')-Ib-cr, oqxAB, and qepA, were investigated in 214 Enterobacteriaceae strains from urine clinical samples. Antimicrobial susceptibility testing for ciprofloxacin, ceftriaxone, and imipenem was performed by broth microdilution method. All strains were screened for PMQR genes by PCR. Virulence determinants, namely afa, pap, pil, sfa/foc, and kpsMT of eight Escherichia coli strains proven positive for at least one qnr gene, were investigated by PCR...
February 23, 2018: Acta Microbiologica et Immunologica Hungarica
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