M. Wiedmann

Risk assessment predicts most of the salmonellosis risk in raw chicken parts is concentrated in those few products with high-levels of high-virulent serotypes of Salmonella

The paper assesses salmonellosis risk in raw chicken parts using microbial risk assessment, finding most illnesses are attributed to a small fraction of products with high levels of high-virulent Salmonella serotypes.

Exposure assessment suggests some cytotoxic Bacillus cereus group genotypes can grow over 3 logs in HTST milk throughout the shelf life at temperature abuse conditions

This study develops an exposure assessment model to predict B. cereus group growth in HTST milk under temperature abuse conditions, showing some genotypes can reach 105 CFU/mL by day 35 of storage.

Intensive environmental sampling and whole genome sequence-based characterization of Listeria in small and medium sized dairy plants reveal opportunities for simplified and size-appropriate environmental monitoring strategies

This study evaluates Listeria monitoring in small and medium dairy plants, finding that pre-operation sampling can effectively detect persistence sites and suggesting simplified monitoring strategies.

Escherichia coli B-strains are intrinsically resistant to colistin and not suitable for characterization and identification of mcr genes

The paper shows that E. coli B-strains are intrinsically resistant to colistin and unsuitable for studying mcr genes due to inherent resistance mechanisms.

More than mcr: Canonical Plasmid- and Transposon-Encoded Mobilized Colistin Resistance (mcr) Genes Represent a Subset of Phosphoethanolamine Transferases

This study identifies and analyzes mcr-like genes, showing they are closely related to intrinsic lipid modification enzymes and evolve through positive selection and genomic context changes.

Structural equation models suggest that on-farm non-crop vegetation removal is not associated with improved food safety outcomes but is linked to impaired water quality

Development and evaluation of statistical and Artificial Intelligence approaches with microbial shotgun metagenomics data as an untargeted screening tool for use in food production

This study evaluates AI and statistical methods on microbial shotgun metagenomics data to detect anomalies in fluid milk, showing explainable AI can classify anomalous samples and identify microbial drivers.

Phage genome cleavage enables resuscitation from Cas13-induced bacterial dormancy

This study shows that type VI CRISPR systems and DNA-cleaving restriction modification systems work together to eliminate phage DNA and neutralize infection in Listeria seeligeri.

A multidrug-resistant Salmonella enterica Typhimurium DT104 complex lineage circulating among humans and cattle in the United States lost the ability to produce pertussis-like toxin ArtAB

The paper identifies a multidrug-resistant Salmonella DT104 lineage lacking the ArtAB toxin, circulating in humans and cattle in the U.S., and shows it lost these genes around 1985-1987.

Nonsynonymous mutations in fepR are associated with Listeria adaptation to low concentrations of benzalkonium chloride, but not increased survival in use level concentrations of benzalkonium chloride.

The paper identifies nonsynonymous fepR mutations in Listeria strains adapted to low benzalkonium chloride concentrations but finds no increased survival at use-level concentrations.

Soil collected in the Great Smoky Mountains National Park yielded a novel Listeria species, L. swaminathanii, effectively expanding the sensu stricto clade to ten species

Monitoring the Antimicrobial Resistance Dynamics of Salmonella enterica in Healthy Dairy Cattle Populations at the Individual Farm Level Using Whole-Genome Sequencing

This study uses whole-genome sequencing to analyze Salmonella strains from dairy cattle farms, revealing AMR dynamics and evaluating in silico tools for serotyping and resistance detection.

Cereulide synthetase acquisition and loss events within the evolutionary history of Group III Bacillus cereus sensu lato facilitate the transition between emetic and diarrheal foodborne pathogen

This study uses phylogenomic analysis to show that cereulide synthetase acquisition and loss events in Group III B. cereus s.l. allow populations to transition between emetic and diarrheal pathogen roles.

Adjacent terrestrial landscapes impact the biogeographical pattern of soil Escherichia coli in produce fields via modifying the importance of environmental selection and dispersal

This study examines how adjacent terrestrial landscapes influence soil E. coli biogeography by altering the balance between environmental selection and dispersal.

Comparative genomics reveals different population structures associated with host and geographic origin in antimicrobial-resistant Salmonella enterica

This study uses comparative genomics to analyze AMR Salmonella enterica isolates from bovine and human hosts, revealing distinct genetic profiles linked to host and geographic origin.

Complex interactions between weather, and microbial and physiochemical water quality impact the likelihood of detecting foodborne pathogens in agricultural water

This study examines how environmental factors and microbial indicators influence pathogen detection in agricultural water, finding that E. coli levels alone are not sufficient to predict food safety risks.

Proposal of a taxonomic nomenclature for the Bacillus cereus group which reconciles genomic definitions of bacterial species with clinical and industrial phenotypes

The Typhoid Toxin Produced by the Nontyphoidal Salmonella Serovar Javiana Can Utilize Multiple Binding Subunits, which Compete for Inclusion in the Holotoxin

This study shows that S. Javiana's typhoid toxin uses multiple binding subunits that compete for inclusion in the holotoxin, enhancing toxin versatility.

Identification of novel mobilized colistin resistance gene mcr-9 in a multidrug-resistant, colistin-susceptible Salmonella enterica serotype Typhimurium isolate using a combination of high-throughput, in silico screening and functional analysis

The paper identifies a novel mcr-9 gene in a multidrug-resistant Salmonella isolate using in silico screening and functional analysis, showing it confers colistin resistance in E. coli.

Characterization of emetic and diarrheal Bacillus cereus strains from a 2016 foodborne outbreak using whole-genome sequencing: addressing the microbiological, epidemiological, and bioinformatic challenges

This paper uses whole-genome sequencing to characterize B. cereus group strains from a foodborne outbreak, identifying emetic and diarrheal isolates and their genetic relationships.