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- Máthé, I., et al.
(author)
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Investigation of mineral water springs of Miercurea Ciuc (Csíkszereda) region (Romania) with cultivation-dependent microbiological methods
- 2010
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In: Acta Microbiologica et Immunologica Hungarica. - 1217-8950 .- 1588-2640. ; 57:2, s. 109-122
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Journal article (peer-reviewed)abstract
- Water samples of ten mineral water springs at Miercurea Ciuc (Csíkszereda) region (Romania) were examined during 2005-2006 using cultivation-dependent microbiological methods. The results of standard hygienic bacteriological tests showed that the Hargita Spring had perfect and five other springs had microbiologically acceptable water quality (Zsögöd-, Nagy-borvíz-, Taploca-, Szentegyháza- and Lobogó springs). The water of Borsáros Spring was exceptionable (high germ count, presence of Enterococcus spp.).Both standard bacteriological and molecular microbiological methods indicated that the microbiological water quality of the Szeltersz-, Nádasszék- and Délo springs was not acceptable. Bad water quality resulted from inadequate spring catchment and hygiene (low yield, lack of runoff, negligent usage of the springs, horse manure around the spring).The 16S rRNA gene-based identification of strains isolated on standard meat-peptone medium resulted in the detection of typical aquatic organisms such as Shewanella baltica, Aeromonas spp., Pseudomonas veronii, Psychrobacter sp,. Acinetobacter spp. and allochthonous microbes, like Nocardia, Streptomyces, Bacillus, Microbacterium , and Arthrobacter strains indicating the impact of soil. Other allochthonous microbes, such as Staphylococcus spp., Micrococcus sp., Lactococcus sp., Clostridium butyricum, Yersinia spp., Aerococcus sp., may have originated from animal/human sources. © 2010 Akadémiai Kiadó, Budapest.
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- Pivarcsi, A, et al.
(author)
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Innate immune functions of the keratinocytes. A review.
- 2004
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In: Acta microbiologica et immunologica Hungarica. - 1217-8950. ; 51:3, s. 303-10
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Journal article (peer-reviewed)abstract
- Human keratinocytes are known to kill living microbes. They express different pattern recognition receptors (PRRs) such as the Toll-like receptor 2 (TLR2), TLR4, the CD1d molecule and a keratinocyte mannose-binding receptor (KcMR). In response to challenge with microbes or microbial-derived substances the activation and nuclear translocation of NF-kappaB, the production of nitric oxide (NO) and inflammatory cytokines occur in keratinocytes, in a TLR-dependent manner. Blocking of NF-kappaB activation or NO production inhibit the Candida albicans-killing activity of keratinocytes. This Candida killing activity could be inhibited by blocking of KcMR. Recognition of invading pathogens in the epidermis triggers cytokine production in keratinocytes leading to elimination of pathogens and the activation of the adaptive immune system. These findings stress the importance of the role of keratinocytes in innate immunity.
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- Titov, Leonid P., et al.
(author)
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Evolutionary epidemiology of Neisseria meningitidis strains in Belarus compared to other European countries
- 2013
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In: Acta Microbiologica et Immunologica Hungarica. - 1217-8950. ; 60:4, s. 397-410
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Journal article (peer-reviewed)abstract
- Introduction. Meningococcal infections are major causes of death in children globally. In Belarus, the incidence of cases and fatality rate of meningococcal infections are low and comparable to the levels in other European countries. Aim. In the present study, the molecular and epidemiological traits of Neisseria meningitidis strains circulating in Belarus were characterized and compared to isolates from other European countries. Materials and Methods. Twenty N. meningitidis strains isolated from patients (n = 13) and healthy contacts (n = 7) during 2006-2012 in Belarus were selected for multilocus sequence typing (MLST), genosubtyping and FetA typing. The STs of the Belarusian strains were phylogenetically compared to the STs of 110 selected strains from 22 other European countries. Results. Overall, eleven different genosubtypes were observed, there were seven variants of variable region of the fetA gene detected. The majority of the STs (95%) found in Belarus were novel and all those were submitted to the Neisseria MLST database for assignment. Several newly discovered alleles of fumC (allele 451) and gdh (allele 560 and 621) appeared to be descendants of alleles which are widespread in Europe, and single aroE alleles (602 and 603) occurred as a result of separate evolution. Conclusions. N. meningitidis strains circulating in Belarus are heterogeneous and include sequence types, possibly, locally evolved in Belarus as well as representatives of widespread European hyperinvasive clonal complexes.
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