Full Text Journal Articles by
Author Ueli von Ah

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In Silico Comparison Shows that the Pan-Genome of a Dairy-Related Bacterial Culture Collection Covers Most Reactions Annotated to Human Microbiomes.

Thomas Roder, Daniel Wüthrich, Cornelia Bär, Zahra Sattari, Ueli von Ah, Francesca Ronchi, Andrew J Macpherson, Stephanie C Ganal-Vonarburg, Rémy Bruggmann, Guy Vergères,

The diversity of the human microbiome is positively associated with human health. However, this diversity is endangered by Westernized dietary patterns that are characterized by a decreased nutrient variety. Diversity might potentially be improved by promoting dietary patterns rich in microbial strains. Various collections of bacterial cultures resulting from a ... Read more >>

Microorganisms (Microorganisms)
[2020, 8(7):]

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Variable Carbon Source Utilization, Stress Resistance, and Virulence Profiles Among Listeria monocytogenes Strains Responsible for Listeriosis Outbreaks in Switzerland.

Francis Muchaamba, Athmanya K Eshwar, Marc J A Stevens, Ueli von Ah, Taurai Tasara,

A combination of phenotype microarrays, targeted stress resistance and virulence assays and comparative genome analysis was used to compare a set of Listeria monocytogenes strains including those involved in previous Swiss foodborne listeriosis outbreaks. Despite being highly syntenic in gene content these strains showed significant phenotypic variation in utilization of ... Read more >>

Front Microbiol (Frontiers in microbiology)
[2019, 10:957]

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Measuring antibiotic resistance in mixed cultures: Isothermal microcalorimetry as a novel analytical tool

Ueli von Ah, Anna Solokhina, Magali Chollet, Noam Shani, Olivier Braissant,

Most Swiss cheese varieties use raw, undefined mixed cultures, which are composed of strains of Lactobacillus delbrueckii subsp. lactis and Streptococcus thermophilus. Single strains of these consortia are not always available. The aim of this study was to determine the antibiotic resistance of such consortia and propose a new approach ... Read more >>

Int. Dairy J. (International dairy journal)
[2018, 77:73-79]

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Blood lactose after dairy product intake in healthy men.

Grégory Pimentel, Kathryn J Burton, Marta Rosikiewicz, Carola Freiburghaus, Ueli von Ah, Linda H Münger, François P Pralong, Nathalie Vionnet, Gilbert Greub, René Badertscher, Guy Vergères,

The absence of a dedicated transport for disaccharides in the intestine implicates that the metabolic use of dietary lactose relies on its prior hydrolysis at the intestinal brush border. Consequently, lactose in blood or urine has mostly been associated with specific cases in which the gastrointestinal barrier is damaged. On ... Read more >>

Br. J. Nutr. (The British journal of nutrition)
[2017, 118(12):1070-1077]

Cited: 5 times

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Probiotic yogurt and acidified milk similarly reduce postprandial inflammation and both alter the gut microbiota of healthy, young men.

Kathryn J Burton, Marta Rosikiewicz, Grégory Pimentel, Ueli Bütikofer, Ueli von Ah, Marie-Jeanne Voirol, Antony Croxatto, Sébastien Aeby, Jocelyne Drai, Philip G McTernan, Gilbert Greub, François P Pralong, Guy Vergères, Nathalie Vionnet,

Probiotic yogurt and milk supplemented with probiotics have been investigated for their role in 'low-grade' inflammation but evidence for their efficacy is inconclusive. This study explores the impact of probiotic yogurt on metabolic and inflammatory biomarkers, with a parallel study of gut microbiota dynamics. The randomised cross-over study was conducted ... Read more >>

Br. J. Nutr. (The British journal of nutrition)
[2017, 117(9):1312-1322]

Cited: 16 times

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Measuring antibiotic resistance in mixed cultures: Isothermal microcalorimetry as a novel analytical tool

Ueli von Ah, Noam Shani, Magali Chollet, Anna Solokhina, Olivier Braissant,

Most Swiss cheese varieties use raw, undefined mixed cultures, which are composed of strains of Lactobacillus delbrueckii subsp. lactis and Streptococcus thermophilus. Single strains of these consortia are not always available. The aim of this study was to determine the antibiotic resistance of such consortia and propose a new approach ... Read more >>

Int. Dairy J. (International dairy journal)
[2017, :p. .]

Cited: 0 times

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Lactic Acid Bacteria as Markers for the Authentication of Swiss Cheeses.

Petra Lüdin, Ueli von Ah, Deborah Rollier, Alexandra Roetschi, Elisabeth Eugster,

The manufacture of traditional Swiss-type cheeses adheres to strict rules, so as to guarantee quality and purity of the end product. This raises production costs and means consumers pay more. It also opens the door to cut-rate forgeries claiming to be made to the stringent standards and causing considerable economic ... Read more >>

Chimia (Aarau) (Chimia)
[2016, 70(5):349-353]

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Evaluation of the passage of Lactobacillus gasseri K7 and bifidobacteria from the stomach to intestines using a single reactor model.

Philipp Ritter, Christian Kohler, Ueli von Ah,

BACKGROUND: Probiotic bacteria are thought to play an important role in the digestive system and therefore have to survive the passage from stomach to intestines. Recently, a novel approach to simulate the passage from stomach to intestines in a single bioreactor was developed. The advantage of this automated one reactor ... Read more >>

BMC Microbiol. (BMC microbiology)
[2009, 9:87]

Cited: 14 times

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Rapid differentiation of methicillin-susceptible Staphylococcus aureus from methicillin-resistant S. aureus and MIC determinations by isothermal microcalorimetry.

Ueli von Ah, Dieter Wirz, A U Daniels,

In this study, the use of isothermal microcalorimetry (IMC) for differentiation between methicillin-resistant Staphylococcus aureus (MRSA) and methicillin-susceptible S. aureus (MSSA) and MIC determination was evaluated. It was possible to differentiate between MRSA and MSSA within 4 h, whereas the standard method required 24 h. The MICs of cefoxitin were ... Read more >>

J. Clin. Microbiol. (Journal of clinical microbiology)
[2008, 46(6):2083-2087]

Cited: 19 times

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Detection of the pediocin gene pedA in strains from human faeces by real-time PCR and characterization of Pediococcus acidilactici UVA1.

Sophie Mathys, Ueli von Ah, Christophe Lacroix, Ernö Staub, Raffaella Mini, Tania Cereghetti, Leo Meile,

BACKGROUND: Bacteriocin-producing lactic acid bacteria are commonly used as natural protective cultures. Among them, strains of the genus Pediococcus are particularly interesting for their ability to produce pediocin, a broad spectrum antimicrobial peptide with a strong antagonistic activity against the food-borne pathogen Listeria monocytogenes. Furthermore, there is increasing interest in ... Read more >>

BMC Biotechnol. (BMC biotechnology)
[2007, 7:55]

Cited: 14 times

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Classification of a moderately oxygen-tolerant isolate from baby faeces as Bifidobacterium thermophilum.

Ueli von Ah, Valeria Mozzetti, Christophe Lacroix, Ehab E Kheadr, Ismaïl Fliss, Leo Meile,

BACKGROUND: Bifidobacteria are found at varying prevalence in human microbiota and seem to play an important role in the human gastrointestinal tract (GIT). Bifidobacteria are highly adapted to the human GIT which is reflected in the genome sequence of a Bifidobacterim longum isolate. The competitiveness against other bacteria is not ... Read more >>

BMC Microbiol. (BMC microbiology)
[2007, 7:79]

Cited: 25 times

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Detection of antifungal properties in Lactobacillus paracasei subsp. paracasei SM20, SM29, and SM63 and molecular typing of the strains.

Susanne Miescher Schwenninger, Ueli von Ah, Brigitte Niederer, Michael Teuber, Leo Meile,

Lactobacilli isolated from different food and feed samples such as raw milk, cheese, yoghurt, olives, sour dough, as well as corn and grass silage, were screened for their antifungal activities. Out of 1,424 isolates tested, 82 were shown to be inhibitory to different yeasts (Candida spp. and Zygosaccharomyces bailii) and ... Read more >>

J. Food Prot. (Journal of food protection)
[2005, 68(1):111-119]

Cited: 10 times

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