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Acta Microbiologica et Immunologica Hungarica

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https://www.readbyqxmd.com/read/28629230/association-between-toxoplasma-gondii-types-and-outcomes-of-human-infection-a-meta-analysis
#1
Jing Xia, Xin-Yu Cheng, Xiao-Jun Wang, Hong-Juan Peng
The virulence and pathogenicity of various types of Toxoplasma gondii differ considerably in mice. Recent studies have claimed that similar phenomenon was observed in humans, but no relevant studies have been performed to validate this finding. In addition, reports showing association between a given T. gondii type and outcomes of human infection yielded conflicting results. To provide a more precise estimation of the association and a more reliable conclusion on this subject, we performed this meta-analysis...
June 20, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28629229/colistin-resistance-associated-with-outer-membrane-protein-change-in%C3%A2-klebsiella-pneumoniae-and-enterobacter-asburiae
#2
Béla Kádár, Béla Kocsis, Ákos Tóth, Katalin Kristóf, Péter Felső, Béla Kocsis, Katalin Böddi, Dóra Szabó
In this study, outer membrane proteins (OMPs) of colistin-resistant Klebsiella pneumoniae and Enterobacter asburiae were analyzed. One colistin-susceptible and three colistin-resistant K. pneumoniae sequence type 258 strains as well as one colistin-susceptible E. asburiae and its colistin-heteroresistant counterpart strain were involved in the study. OMP analysis of each strain was performed by microchip method. Matrix-assisted laser desorption ionization time of flight/mass spectrometry (MALDI-TOF/MS) investigation was carried out after separation of OMPs by two-dimensional gel electrophoresis and in-gel digestion...
June 20, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28627239/complex-multicellular-functions-at-a-unicellular-eukaryote-level-learning-memory-and-immunity
#3
György Csaba
According to experimental data, eukaryote unicellulars are able to learn, have immunity and memory. Learning is carried out in a very primitive form, and the memory is not neural but an epigenetic one. However, this epigenetic memory, which is well justified by the presence and manifestation of hormonal imprinting, is strong and permanent in the life of cell and also in its progenies. This memory is epigenetically executed by the alteration and fixation of methylation pattern of genes without changes in base sequences...
June 19, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28627238/immune-responses-to-killed-reassorted-influenza-virus-supplemented-with-natural-adjuvants
#4
Mona Abdel Fattah Razin, Ahmed Osman, Mohamed Ahmed Ali, Mahmoud Mohamed Bahgat, Amany Sayed Maghraby
In this study, we investigated the immunomodulatory effects of a supplemented killed influenza virus (V) by Echinacea purpurea (E) and Nigella sativa (N) extracts and effect of changing the route of immunization from intramuscular (IM) to intraperitoneal (IP). At the 2(nd)-, 3(rd)- and 4(th)-week post-IM immunizations (WPIMI), the supplemented V with N (VN) induced the most significant IgM response unlike N alone. At the 2(nd) WPIMI, V or VN induced the highest significant IgG levels. At the 2(nd)-week post-IP immunization (WPIPI), E and VN induced the most significant IgG levels...
June 19, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28597685/a-gain-of-function-mutation-of-stat1-a-novel-genetic-factor-contributing-to-chronic-mucocutaneous-candidiasis
#5
Narges Eslami, Marzieh Tavakol, Mehrnaz Mesdaghi, Mohammad Gharegozlou, Jean-Laurent Casanova, Anne Puel, Satoshi Okada, Saba Arshi, Mohammad Hassan Bemanian, Morteza Fallahpour, Rasool Molatefi, Farhad Seif, Samaneh Zoghi, Nima Rezaei, Mohammad Nabavi
Heterozygous gain-of-function (GOF) mutations in the signal transducer and activator of transcription 1 (STAT1) have increasingly been identified as a genetic cause of autosomal-dominant (AD) chronic mucocutaneous candidiasis (CMC). In this article, we describe a 33-year-old man who experienced chronic refractory candidiasis, recurrent otitis media, and pneumonia resulting in bronchiectasis, severe oral and esophageal candidiases with strictures associated with hypothyroidism and immune hemolytic anemia. His son also suffered from persistent candidiasis, chronic diarrhea, poor weight gain, and pneumonia that resulted in his demise because of sepsis...
June 9, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28597684/protection-against-shigellosis-caused-by-shigella-dysenteriae-serotype-4-in-guinea-pigs-using-escherichia-albertii-dm104-as-a-live-vaccine-candidate-strain
#6
Fatema Moni Chowdhury, Mohammed Ziaur Rahman, Md Murshed Hasan Sarkar, Fazle Rabbi, Sirajul Islam Khan, Chowdhury Rafiqul Ahsan, Nils-Kåre Birkeland
Recently, we reported the induction of protective immunity by environmental Escherichia albertii strain DM104 against Shigella dysenteriae in guinea pig model. In this study, we assessed three different immunization routes, such as intranasal, oral, and intrarectal routes, and revealed differences in immune responses by measuring both the serum IgG and mucosal IgA antibody titers. Protective efficacy of different routes of immunization was also determined by challenging immunized guinea pigs against live S...
June 9, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28560883/a-deletion-mutation-in-nfxb-of-in-vitro-induced-moxifloxacin-resistant-pseudomonas-aeruginosa-confers-multidrug-resistance
#7
Van Chi Thai, Hoang Vy Pham, Duc Nhat Minh Nguyen, Peter Lambert, Thi Thu Hoai Nguyen
The modulation of efflux pump functions under fluoroquinolone (FQ) exposure is of great concern as it could result in occurrence of multidrug-resistant (MDR) bacterial strains. In this study, MDR mechanism in Pseudomonas aeruginosa induced via moxifloxacin (MOX) pressure was investigated. After serial MOX [concentration of 0.5 × the minimum inhibitory concentration (MIC)] exposure, the fully susceptible P. aeruginosa ATCC 9027 strain has increased its MIC not only toward MOX (1→128 mg/L) but also to other antibiotics...
May 31, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28420242/high-prevalence-of-ndm-metallo-%C3%AE-lactamase-among-esbl-producing-escherichia-coli-%C3%A4-solates
#8
Yeliz Çetinkol, Cemal Sandalli, Mustafa Kerem Çalgin, Arzu Altunçekiç Yildirim, Esma Akyildiz, Esin Karaman, Ayşegül Çopur Çiçek
Resistance to β-lactams in Enterobacteriaceae has been increasing worldwide. This study aimed to determine the frequency of β-lactamase genes and antibiotic resistance rates of 140 extended-spectrum β-lactamase (ESBL)-producing Escherichia coli isolates obtained from urinary tract infection in Ordu Province, Turkey. Isolates were identified by classic methods and by automated system. ESBL production was confirmed by double disk synergy test and antimicrobial susceptibility was investigated by disk diffusion method...
April 19, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28263103/study-on-the-glutathione-metabolism-of-the-filamentous-fungus-aspergillus-nidulans
#9
Fruzsina Bakti, Anita Király, Erzsébet Orosz, Márton Miskei, Tamás Emri, Éva Leiter, István Pócsi
Yeast protein sequence-based homology search for glutathione (GSH) metabolic enzymes and GSH transporters demonstrated that Aspergillus nidulans has a robust GSH uptake and metabolic system with several paralogous genes. In wet laboratory experiments, two key genes of GSH metabolism, gcsA, and glrA, encoding γ-l-glutamyl-l-cysteine synthetase and glutathione reductase, respectively, were deleted. The gene gcsA was essential, and the ΔgcsA mutant required GSH supplementation at considerably higher concentration than the Saccharomyces cerevisiae gsh1 mutant (8-10 mmol l(-1) vs...
March 6, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28263102/effect-of-primycin-on-growth-arrested-cultures-and-cell-integrity-of-staphylococcus-aureus
#10
Péter Feiszt, György Schneider, Levente Emődy
Bactericidal effect against non-dividing bacteria is a very advantageous, but rare characteristic among antimicrobial agents, mostly possessed by those affecting the cell membrane. These kinds of agents can kill bacterial cells without lysis. We assessed these characteristics on primycin, a topical anti-staphylococcal agent highly effective against prevalent multiresistant strains, as it also acts on the cell membrane. In time-kill studies, primycin preserved its bactericidal activity against growth-arrested Staphylococcus aureus cultures...
March 6, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28263101/advances-in-diagnosis-and-treatment-of-helicobacter-pylori-infection
#11
Reza Ranjbar, Payam Behzadi, Shohreh Farshad
Helicobacter pylori is a Gram-negative motile bacterium causative agent of acute and chronic digestive and extra-digestive human infections. According to different reports worldwide, H. pylori symptomatic and asymptomatic infections are a global problem. The statistical investigations show a percentage of 50 for people who are involved in H. pylori acute/chronic digestive and/or extra-digestive infections around the world. This review focuses on digestive and extra-digestive diseases caused by H. pylori, the related virulence factors, diagnostic techniques including non-invasive and invasive diagnostics and treatment...
March 6, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28357924/association-study-of-the-fto-gene-polymorphisms-with-the-risk-of-pulmonary-tuberculosis-in-a-sample-of-iranian-population
#12
Mohammad Naderi, Mohammad Hashemi, Nahid Dejkam, Gholamreza Bahari, Maryam Rezaei, Mohsen Taheri
AIM: The aim of the present study was to find out the impact of fat mass and obesity-associated (FTO) gene on risk of pulmonary tuberculosis (PTB) in a sample of Iranian population. METHODS: This case-control study was carried out on a total of 354 subjects including 185 PTB patients and 169 healthy subjects. Genotyping of FTO rs9939609 and rs8050136 variants was done using polymerase chain reaction-restriction fragment length polymorphism method. RESULTS: FTO rs9939609 variant showed no statistically significant difference in allele and genotype frequencies between PTB patients and controls...
March 1, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28357923/performance-of-carbanp-and-cim-tests-in-oxa-48-carbapenemase-producing-enterobacteriaceae
#13
Serap Süzük Yıldız, Banu Kaşkatepe, Havva Avcıküçük, Şükran Öztürk
This study applied two phenotypic tests, namely "Carbapenemase Nordmann-Poirel" (CarbaNP) test and "Carbapenem Inactivation Method" (CIM), against the isolates carrying the carbapenem resistance genes. The study included 83 carbapenem-resistant Enterobacteriaceae isolates producing oxacillinase-48 (OXA-48) and 30 carbapenem-sensitive Enterobacteriaceae isolates. Out of the total isolates studied, 77 isolates (92.77%) were identified as Klebsiella pneumoniae and six isolates (7.23%) were identified as Escherichia coli by Matrix Assisted Laser Desorption Ionization-Time of Flight Mass Spectrometry...
March 1, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28220708/epidemiology-and-antibiotic-sensitivity-of-staphylococcus-aureus-nasal-carriage-in-children-in-hungary
#14
Krisztina Laub, Adrienn Tóthpál, Szilvia Kardos, Orsolya Dobay
The aim of this study was to assess the Staphylococcus aureus nasal carriage rate in healthy children all over Hungary and to specify some risk factors, the antibiotic resistance patterns of the bacteria, and their genetic relatedness. In total, 878 children (aged 3-6 years) were screened at 21 day-care centers in 16 different cities in Hungary, between February 2009 and December 2011. Samples taken from both nostrils were cultured on blood agar, and suspected S. aureus isolates were identified by β-hemolysis, catalase positivity, clump test, and nucA PCR...
March 1, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28220707/first-description-of-a-rifampicin-resistant-neisseria-meningitidis-serogroup-y-strain-causing-recurrent-invasive-meningococcal-disease-in-hungary
#15
Ákos Tóth, Brigitta Berta, Tamás Tirczka, Csilla Jekkel, Anita Ábrahám, Zoltán Prohászka, Zsófia Bognár, Tímea Erdősi
A Hungarian soldier previously immunized against Neisseria meningitidis by quadrivalent polysaccharide vaccine was twice infected with meningococci within six weeks. The patient was treated with ceftriaxone during both episodes and he successfully recovered. His close contacts received rifampicin prophylaxis. An investigation was performed to characterize the genetic background of the pathogens to ascertain if the recurrent invasive meningococcal disease was caused by the same strain and to find out the reason for reinfection...
March 1, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28218003/virulotyping-of-shigella-spp-isolated-from-pediatric-patients-in-tehran-iran
#16
Reza Ranjbar, Masomeh Bolandian, Payam Behzadi
Shigellosis is a considerable infectious disease with high morbidity and mortality among children worldwide. In this survey the prevalence of four important virulence genes including ial, ipaH, set1A, and set1B were investigated among Shigella strains and the related gene profiles identified in the present investigation, stool specimens were collected from children who were referred to two hospitals in Tehran, Iran. The samples were collected during 3 years (2008-2010) from children who were suspected to shigellosis...
March 1, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28198195/novel-adenovirus-detected-in-kowari-dasyuroides-byrnei-with-pneumonia
#17
János Gál, Míra Mándoki, Endre Sós, Péter Kertész, Viktória Koroknai, Krisztián Bányai, Szilvia L Farkas
A male kowari (Dasyuroides byrnei) originating from a zoo facility was delivered for post mortem evaluation in Hungary. Acute lobar pneumonia with histopathologic changes resembling an adenovirus (AdV) infection was detected by light microscopic examination. The presence of an AdV was confirmed by obtaining partial sequence data from the adenoviral DNA-dependent DNA-polymerase. Although the exact taxonomic position of this novel marsupial origin virus could not be determined, pairwise identity analyses and phylogenetic calculations revealed that it is distantly related to other members in the family Adenoviridae...
March 1, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/27936860/detection-of-acra-acrb-aac-6-ib-cr-and-qepa-genes-among-clinical-isolates-of-escherichia-coli-and-klebsiella-pneumoniae
#18
Mohsen Heidary, Aghil Bahramian, Ali Hashemi, Mehdi Goudarzi, Vahid Fallah Omrani, Gita Eslami, Hossein Goudarzi
BACKGROUND: The distribution of drug resistance among clinical isolates of Escherichia coli and Klebsiella pneumoniae has limited the therapeutic options. The aim of this study was to report the prevalence of quinolone resistance genes among E. coli and K. pneumoniae clinical strains isolated from three educational hospitals of Tehran, Iran. MATERIALS AND METHODS: A total of 100 strains of E. coli from Labbafinejad and Taleghani Hospitals and 100 strains of K. pneumoniae from Mofid Children and Taleghani Hospitals were collected between January 2013 and May 2014...
March 1, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/27929353/enhanced-survival-but-not-amplification-of-francisella-spp-in-the-presence-of-free-living-amoebae
#19
Helen Y Buse, Frank W Schaefer Iii, Eugene W Rice
Transmission of Francisella tularensis, the etiologic agent of tularemia, has been associated with various water sources. Survival of many waterborne pathogens within free-living amoeba (FLA) is well documented; however, the role of amoebae in the environmental persistence of F. tularensis is unclear. In this study, axenic FLA cultures of Acanthamoeba castellanii, Acanthamoeba polyphaga, and Vermamoeba vermiformis were each inoculated with virulent strains of F. tularensis (Types A and B), the attenuated live vaccine strain, and Francisella novicida...
March 1, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/27842441/identification-of-two-substrates-of-fts_1067-protein-an-essential-virulence-factor-of-francisella-tularensis
#20
Petra Spidlova, Iva Senitkova, Marek Link, Jiri Stulik
Francisella tularensis is a highly virulent intracellular pathogen with the capacity to infect a variety of hosts including humans. One of the most important proteins involved in F. tularensis virulence and pathogenesis is the protein DsbA. This protein is annotated as a lipoprotein with disulfide oxidoreductase/isomerase activity. Therefore, its interactions with different substrates, including probable virulence factors, to assist in their proper folding are anticipated. We aimed to use the immunopurification approach to find DsbA (gene locus FTS_1067) interacting partners in F...
March 1, 2017: Acta Microbiologica et Immunologica Hungarica
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