Franziska Breitenwieser

Taxonomic Evaluation of the Heyndrickxia (Basonym Bacillus) sporothermodurans Group (H. sporothermodurans, H. vini, H. oleronia) Based on Whole Genome Sequences

Gregor Fiedler, Anna-Delia Herbstmann, Etienne V. Doll, Mareike Wenning et autres

The genetic heterogeneity of Heyndrickxia sporothermodurans (formerly Bacillussporothermodurans) was evaluated using whole genome sequencing. The genomes of 29 previously identified Heyndrickxiasporothermodurans and two Heyndrickxia vini strains isolated from ultra-high-temperature (UHT)-treated milk were sequenced by short-read (Illumina) sequencing. After sequence analysis, the two …

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Complementary Use of Cultivation and High-Throughput Amplicon Sequencing Reveals High Biodiversity Within Raw Milk Microbiota

Franziska Breitenwieser, Etienne V. Doll, Thomas Clavel, Siegfried Scherer et autres

Raw milk microbiota are complex communities with a significant impact on the hygienic, sensory and technological quality of milk products. However, there is a lack of knowledge on factors determining their composition. In the present study, four bulk tank milk samples of …

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Enumeration and Identification of Bacterial Spores in Cocoa Powders

Robyn T. Eijlander, Franziska Breitenwieser, Erik Hoornstra, Henri J. Kamphuis et autres

ABSTRACT: The presence of bacterial spores in cocoa powders is inevitable due to the cocoa bean fermentation process, during which members of the genera Bacillus and Geobacillus are typically present. Spores are a concern in heat-treated foods when they survive heat treatments …

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Brevilactibacter flavus gen. nov., sp. nov., a novel bacterium of the family Propionibacteriaceae isolated from raw milk and dairy products and reclassification of Propioniciclava sinopodophylli as Brevilactibacter sinopodophylli comb. nov.

Mareike Wenning, Franziska Breitenwieser, Christopher Huptas, Etienne V. Doll et autres

Eight facultatively anaerobic rod-shaped bacteria were isolated from raw milk and two other dairy products. Results of phylogenetic analyses based on 16S rRNA gene sequences showed that the isolates are placed in a distinct lineage within the family Propionibacteriaceae with Propioniciclava sinopodophylli …

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Analyse der bakteriellen Biodiversität von boviner Rohmilch mittels kultureller und kulturunabhängiger Verfahren

Franziska Breitenwieser

Die Biodiversität der Rohmilchmikrobiota wird hauptsächlich von der Gesamtkeimzahl beeinflusst, andere Einflussfaktoren sind sekundär. Pseudomonas stellt die häufigste Gattung. Die Erfassung der Biodiversität erfordert die Kombination kulturabhängiger und -unabhängiger Methoden. Zahlreiche nicht beschriebene Spezies wurden gefunden, eine neue Gattung innerhalb der Propionibacteriaceae …

Bovine Staphylococcus aureus: Subtyping, evolution, and zoonotic transfer

Renate Boss, A. Cosandey, Mario Vittorio Luini, Karin Artursson et autres

Staphylococcus aureus is globally one of the most important pathogens causing contagious mastitis in cattle. Previous studies using ribosomal spacer (RS)-PCR, however, demonstrated in Swiss cows that Staph. aureus isolated from bovine intramammary infections are genetically heterogeneous, with Staph. aureus genotype B …

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Staphylococcus aureus genotype B and other genotypes isolated from cow milk in European countries

A. Cosandey, Renate Boss, Mario Vittorio Luini, Karin Artursson et autres

Staphylococcus aureus is globally one of the most important pathogens causing contagious mastitis in cattle. Previous studies, however, have demonstrated in Swiss cows that Staph. aureus isolated from bovine intramammary infection is genetically heterogeneous, with Staph. aureus genotype B (GTB) and GTC …

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Identification and differentiation of food-related bacteria: A comparison of FTIR spectroscopy and MALDI-TOF mass spectrometry

Mareike Wenning, Franziska Breitenwieser, Regina Konrad, Ingrid Huber et autres

The food industry requires easy, accurate, and cost-effective techniques for microbial identification to ensure safe products and identify microbial contaminations. In this work, FTIR spectroscopy and MALDI-TOF mass spectrometry were assessed for their suitability and applicability for routine microbial diagnostics of food-related …

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