Papers by Katarina Veljovic
International Journal of Molecular Sciences
Bronchial epithelial cells are exposed to environmental influences, microbiota, and pathogens and... more Bronchial epithelial cells are exposed to environmental influences, microbiota, and pathogens and also serve as a powerful effector that initiate and propagate inflammation by the release of pro-inflammatory mediators. Recent studies suggested that lung microbiota differ between inflammatory lung diseases and healthy lungs implicating their contribution in the modulation of lung immunity. Lactic acid bacteria (LAB) are natural inhabitants of healthy human lungs and also possess immunomodulatory effects, but so far, there are no studies investigating their anti-inflammatory potential in respiratory cells. In this study, we investigated immunomodulatory features of 21 natural LAB strains in lipopolysaccharide (LPS)-stimulated human bronchial epithelial cells (BEAS-2B). Our results show that several LAB strains reduced the expression of pro-inflammatory cytokine and chemokine genes. We also demonstrated that two LAB strains, Lactobacillus brevis BGZLS10-17 and Lb. plantarum BGPKM22, ef...
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One hundred and seventy eight isolates of lactic acid bacteria (LAB) were isolated by pour plate ... more One hundred and seventy eight isolates of lactic acid bacteria (LAB) were isolated by pour plate and enrichment techniques from a sample of milk used for kajmak production and three samples of kajmak from one month ripening period. The identification of isolates was performed by phenotypic characterization followed by molecular identification using (GTG) 5 -PCR and sequence analysis of 16S rRNA gene. Isolates belonged to Lactococcus lactis and Enterococcus faecium were found in milk and kajmak samples while Leuconostoc mesenteroides and Enterococcus durans were the most frequently isolated species from kajmak samples. Streptococcus thermophilus were isolated from milk sample only with enrichment technique. Further characterization of LAB isolates was done for technological properties which are important for industrial application of LAB. Strains of Lc. lactis and S. thermophilus that showed very good acidification and proteolityc activities and L. mesenteroides strains that metaboli...
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Frontiers in Microbiology, 2019
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Frontiers in microbiology, 2017
The aim of this work was to design a novel mixed probiotic culture for piglets and to evaluate it... more The aim of this work was to design a novel mixed probiotic culture for piglets and to evaluate its beneficial effect on the piglets' gut health. The possible mechanisms of probiotic activity, such as adhesion, competitive pathogen exclusion and influence on gut microbiota diversity were determined. Mixed probiotic starter culture is composed of three thermophilic lactic acid bacteria (LAB) strains: Lactobacillus helveticus BGRA43, Lactobacillus fermentum BGHI14 and Streptococcus thermophilus BGVLJ1-44. The strains BGVLJ1-44 and BGRA43 showed good technological properties (fast milk curdling, strong proteolytic activity). In addition, the strain BGVLJ1-44 produces exopolysaccharide (EPS), BGHI14 is heterofermentative LAB strain with significant immunomodulatory effect, while the strain BGRA43 showed strong antimicrobial activity against different pathogens and exhibited significantly higher level of adhesion to Caco-2 cells comparing to other two strains. Both lactobacilli strain...
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BMC Microbiology, 2017
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Frontiers in Microbiology, 2016
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LWT - Food Science and Technology, 2015
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Frontiers in Microbiology, 2017
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Archives of Biological Sciences, 2009
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The Science of the total environment, Jan 5, 2015
New Delhi metallo-beta-lactamase-1 (NDM-1) will soon become the most commonly isolated and distri... more New Delhi metallo-beta-lactamase-1 (NDM-1) will soon become the most commonly isolated and distributed metallo-beta-lactamase worldwide due to its rapid international dissemination and its ability to be expressed by numerous Gram-negative pathogens. NDM-positive bacteria pose a significant public health threat in the Indian subcontinent and the Balkans, which have been designated as endemic regions. Our study was focused on urban rivers, a lake and springheads as a potential source of NDM-1-producing strains in Serbia, but also as a source of other metallo-beta-lactamases and extended-spectrum beta-lactamase (ESBL) producing bacteria. A total of 69 beta-lactam resistant isolates, belonging to 12 bacterial genera, were collected from 8 out of 10 different locations in Belgrade, of which the most were from a popular recreational site, Ada Ciganlija Lake. Phenotypic tests revealed 7 (10.14%) ESBL-producing isolates and 39 (56.52%) isolates resistant to imipenem, of which 32 were positi...
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Frontiers in Microbiology, 2015
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Theoretical and Applied Climatology, 2014
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Genetika, 2012
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Theoretical and Applied Climatology, 2010
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Several points are made concerning the somewhat controversial issue of regional climate modeling:... more Several points are made concerning the somewhat controversial issue of regional climate modeling: should a regional climate model (RCM) be expected to maintain the large scale skill of the driver global model that is supplying its lateral boundary condition (LBC)? Given that this is normally desired, is it able to do so without help via the fairly popular large scale nudging? Specifically, without such nudging, will the RCM kinetic energy necessarily decrease with time compared to that of the driver model or analysis data as suggested by a study using the Regional Atmospheric Modeling System (RAMS)? Finally, can the lateral boundary condition scheme make a difference: is the almost universally used but somewhat costly relaxation scheme necessary for a desirable RCM performance? Experiments are made to explore these questions running the Eta model in two versions differing in the lateral boundary scheme used. One of these schemes is the traditional relaxation scheme, and the other th...
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Microbiological Research, 2013
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Meteorology and Atmospheric Physics, 2012
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Meat Science, 2011
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International Journal of Food Microbiology, 2008
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Food Control, 2009
... al., 2006], [Ben Omar et al., 2004] and [Ogier and Serror, in press]), and play a relevant ro... more ... al., 2006], [Ben Omar et al., 2004] and [Ogier and Serror, in press]), and play a relevant role in the development of the organoleptic characteristics of the final product due to their proteolytic and esterolytic activities and their diacetyl production by citrate metabolism ([Centeno et al ...
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Papers by Katarina Veljovic