Martin Wiedmann
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View article: <i>Salmonella</i> Serovar Wiki: a curated web portal providing a comprehensive summary of <i>Salmonella</i> serovars for academia, industry, and public health
<i>Salmonella</i> Serovar Wiki: a curated web portal providing a comprehensive summary of <i>Salmonella</i> serovars for academia, industry, and public health Open
Salmonella is a major foodborne pathogen causing substantial illness and economic burden globally. To address the lack of a centralized resource, we developed the Salmonella Serovar Wiki, a curated web portal providing comprehensive, serov…
View article: Integration of mathematical modeling and economics approaches to evaluate strategies for control of Salmonella Dublin in a heifer-raising operation
Integration of mathematical modeling and economics approaches to evaluate strategies for control of Salmonella Dublin in a heifer-raising operation Open
Salmonella Dublin infections in heifer-raising operations (HROs) cause animal health and economic losses for these operations and represent a pathogen source for dairy farms obtaining replacement heifers from HROs. To improve control of S …
View article: Salmonella serovar Infantis REPJFX01 isolates bear a pESI plasmid that includes additional genes not found in closely related non-REP strains
Salmonella serovar Infantis REPJFX01 isolates bear a pESI plasmid that includes additional genes not found in closely related non-REP strains Open
Salmonella enterica subsp. enterica serovar Infantis ( S . Infantis) REPJFX01 is a multidrug-resistant strain associated with poultry and international travel; this strain has been designated as a reoccurring, emerging and persistent (REP)…
View article: Retrospective Analysis of Historical <i>Listeria monocytogenes</i> Clinical Isolates, New York, USA, 2000–20211
Retrospective Analysis of Historical <i>Listeria monocytogenes</i> Clinical Isolates, New York, USA, 2000–20211 Open
We used whole-genome sequencing data to investigate historical Listeria monocytogenes clinical (n = 1,046) and nonclinical (n = 1,325) isolates from New York, USA. Applying a threshold of 10 years apart; 33 clusters included isolates from …
View article: Farm-to-consumer quantitative microbial risk assessment model for Listeria monocytogenes on fresh-cut cantaloupe
Farm-to-consumer quantitative microbial risk assessment model for Listeria monocytogenes on fresh-cut cantaloupe Open
Cantaloupe contamination with the foodborne pathogen Listeria monocytogenes (LM) may occur along the supply chain. We developed a quantitative microbial risk assessment (QMRA) model for LM on cantaloupe along the fresh-cut supply chain and…
View article: Raw milk from individual teats with an optimal teat-end score has lower spore levels compared with teats with a suboptimal teat-end score
Raw milk from individual teats with an optimal teat-end score has lower spore levels compared with teats with a suboptimal teat-end score Open
Udder health in dairy cows is routinely monitored (for example, through determination of SCC) to help identify and control mastitis and other infectious diseases. Another parameter used to both assess udder health and milking machine perfo…
View article: Tackling One Health Risks: How Large Language Models are leveraged for Risk Negotiation and Consensus-building
Tackling One Health Risks: How Large Language Models are leveraged for Risk Negotiation and Consensus-building Open
Key global challenges of our times are characterized by complex interdependencies and can only be effectively addressed through an integrated, participatory effort. Conventional risk analysis frameworks often reduce complexity to ensure ma…
View article: Clostridium tyrobutyricum strains exhibit high genetic diversity and differ in their ability to cause late blowing defect in washed-curd cheese
Clostridium tyrobutyricum strains exhibit high genetic diversity and differ in their ability to cause late blowing defect in washed-curd cheese Open
Clostridium tyrobutyricum is a spore-forming bacterium and is considered to be one of the main causative agents of late blowing defect (LBD) of hard and semi-hard cheeses. However, the spoilage potential of C. tyrobutyricum appears to be s…
View article: Novel genetic features associated with the recently emerged MDR clade of <i>Salmonella</i> Dublin linked to human clinical cases
Novel genetic features associated with the recently emerged MDR clade of <i>Salmonella</i> Dublin linked to human clinical cases Open
Salmonella Dublin is an enteric pathogen that has adapted to cattle as its primary host. It rarely causes foodborne outbreaks but is frequently associated with invasive and severe infections in humans. However, the underlying mechanisms re…
View article: A fluid milk spoilage simulation framework reveals the need for spoilage intervention strategies that account for frequency of bacterial postpasteurization contamination
A fluid milk spoilage simulation framework reveals the need for spoilage intervention strategies that account for frequency of bacterial postpasteurization contamination Open
Postpasteurization contamination (PPC) with gram-negative bacteria and the growth of spore-forming bacteria are major causes of fluid milk spoilage, typically leading to sensory defects when bacterial concentrations exceed 6 log10 cfu/mL. …
View article: Minimizing Threats Through Responsible Voluntary Confidential Food Safety Data Sharing: Insights from Food Industry Leaders
Minimizing Threats Through Responsible Voluntary Confidential Food Safety Data Sharing: Insights from Food Industry Leaders Open
Voluntary sharing of confidential food safety data among companies can improve food safety and enhance efficiency and decision-making, especially for rare events. However, despite its potential benefits, inter-organizational data sharing i…
View article: Phylogeny and divergence of the 100 most common Salmonella serovars available in the NCBI Pathogen Detection database
Phylogeny and divergence of the 100 most common Salmonella serovars available in the NCBI Pathogen Detection database Open
Despite the emergence of whole genome sequencing (WGS) for Salmonella characterization, serotype assignment remains important as it allows identification of Salmonella subgroups that differ in distribution, virulence, and ecology. However,…
View article: Development of a consumer-driven chocolate milk sensory ballot for use in the dairy industry
Development of a consumer-driven chocolate milk sensory ballot for use in the dairy industry Open
Chocolate milk is an important dairy product in the United States, but current sensory ballots used to assess product quality and defects lack relevance for consumer-identified attributes of importance. Therefore, the objective of this res…
View article: Risk assessment of Escherichia coli O157:H7 along the farm-to-fork fresh-cut romaine lettuce supply chain
Risk assessment of Escherichia coli O157:H7 along the farm-to-fork fresh-cut romaine lettuce supply chain Open
Outbreaks of Escherichia coli O157:H7 (ECO157) in romaine lettuce remain an ongoing public health concern. Quantitative microbial risk assessment (QMRA) models are key tools for identifying control measures to mitigate foodborne diseases. …
View article: The most effective strategy for verifying the absence of sanitizer contamination in milk depends on the sanitizer type used in fluid milk processing facilities
The most effective strategy for verifying the absence of sanitizer contamination in milk depends on the sanitizer type used in fluid milk processing facilities Open
Contamination of fluid milk with chemicals used for equipment sanitation is a safety and quality concern that has led to incidents of consumers being exposed to milk contaminated with sanitizer. In this study, we first surveyed dairy proce…
View article: An agent-based model of COVID- 19 in the food industry for assessing public health and economic impacts of infection control strategies
An agent-based model of COVID- 19 in the food industry for assessing public health and economic impacts of infection control strategies Open
The COVID- 19 pandemic exposed challenges of balancing public health and economic goals of infection control in essential industries like food production. To enhance decision-making during future outbreaks, we developed a customizable agen…
View article: A Critical Review of Parameters Relevant for Shiga Toxin-producing Escherichia coli and Listeria monocytogenes Risk Assessments of Leafy Greens
A Critical Review of Parameters Relevant for Shiga Toxin-producing Escherichia coli and Listeria monocytogenes Risk Assessments of Leafy Greens Open
In the past decade, several quantitative models and risk assessments for Shiga toxin-producing Escherichia coli (STEC) and Listeria monocytogenes have been developed to guide the management of these pathogens in fresh produce. However, the…
View article: Assessment of drivers of Listeria environmental monitoring programs in small- and medium-sized dairy processing plants
Assessment of drivers of Listeria environmental monitoring programs in small- and medium-sized dairy processing plants Open
Small- and medium-sized dairy processing plants (SMDPP) may face unique challenges, such as limited financial resources, when implementing Listeria environmental monitoring programs (EMP). To better understand what drives investment in Lis…
View article: Spore levels in bulk tank organic raw milk and whole milk powder are reduced by udder hair singeing
Spore levels in bulk tank organic raw milk and whole milk powder are reduced by udder hair singeing Open
Routine removal of udder hair through singeing or clipping is a farm management practice that is often used with the intention of reducing SCC and mastitis caused by environmental pathogens. Udder hair removal was also recently identified …
View article: A Machine–Learning Approach Reveals That Bacterial Spore Levels in Organic Bulk Tank Milk are Dependent on Farm Characteristics and Meteorological Factors
A Machine–Learning Approach Reveals That Bacterial Spore Levels in Organic Bulk Tank Milk are Dependent on Farm Characteristics and Meteorological Factors Open
Bacterial spores in raw milk can lead to quality issues in milk and milk-derived products. As these spores originate from farm environments, it is important to understand the contributions of farm-level factors to spore levels. This study …
View article: Farm-to-consumer quantitative microbial risk assessment model for<i>Listeria monocytogenes</i>on fresh-cut cantaloupe
Farm-to-consumer quantitative microbial risk assessment model for<i>Listeria monocytogenes</i>on fresh-cut cantaloupe Open
Cantaloupe contamination with the foodborne pathogen Listeria monocytogenes (LM) may occur along the supply chain. We developed a quantitative microbial risk assessment (QMRA) model for LM on cantaloupe along the fresh-cut supply chain and…
View article: Diverse spore-forming bacterial populations in US organic raw milk are driven by climate region
Diverse spore-forming bacterial populations in US organic raw milk are driven by climate region Open
Spore-forming bacteria pose significant challenges to the dairy industry, as they are present at high levels in the natural environment and can cause finished product spoilage. To improve organic raw milk quality and minimize spoilage caus…
View article: <b>Single nucleotide polymorphisms associated with cytotoxicity of <i>Bacillus cereus</i> group strains in Caco-2 cells</b>
<b>Single nucleotide polymorphisms associated with cytotoxicity of <i>Bacillus cereus</i> group strains in Caco-2 cells</b> Open
Bacillus cereus sensu lato ( s.l .) encompasses strains with diverse impacts, ranging from foodborne illness and anthrax to beneficial applications in agriculture and industry. While the risk of anthrax and emetic intoxication can be relia…
View article: Initializing a Public Repository for Hosting Benchmark Datasets to Facilitate Machine Learning Model Development in Food Safety
Initializing a Public Repository for Hosting Benchmark Datasets to Facilitate Machine Learning Model Development in Food Safety Open
While there is clear potential for artificial intelligence (AI) and machine learning (ML) models to help improve food safety, the development and deployment of these models in the food safety domain are by and large lacking. The absence of…
View article: Non-spore-forming thermoduric bacteria vary considerably in thermal resistance in milk media between strains from the same genus
Non-spore-forming thermoduric bacteria vary considerably in thermal resistance in milk media between strains from the same genus Open
Thermoduric bacteria, defined as those that survive temperatures considerably above their maximum growth temperature, are enumerated in milk using the laboratory pasteurization count (LPC) test. This test selects for bacteria that show lim…
View article: Risk assessment of<i>Escherichia coli</i>O157:H7 along the farm-to-fork fresh-cut romaine lettuce supply chain
Risk assessment of<i>Escherichia coli</i>O157:H7 along the farm-to-fork fresh-cut romaine lettuce supply chain Open
Outbreaks of Escherichia coli O157:H7 (ECO157) in romaine lettuce remain an ongoing public health concern. Quantitative microbial risk assessment (QMRA) models are key tools for identifying control measures to mitigate foodborne diseases. …
View article: Integration of mathematical modeling and economics approaches to evaluate strategies for control of <i>Salmonella</i> Dublin in a heifer-raising operation
Integration of mathematical modeling and economics approaches to evaluate strategies for control of <i>Salmonella</i> Dublin in a heifer-raising operation Open
Salmonella Dublin infections in heifer-raising operations (HROs) cause animal health and economic losses for these operations and represent a pathogen source for dairy farms obtaining replacement heifers from HROs. To improve control of S …
View article: Microbial risk analysis from a food industry perspective – insights from an international survey
Microbial risk analysis from a food industry perspective – insights from an international survey Open
Foodborne microbial hazards lead to substantial morbidity and mortality. To assure consumer protection, a need to move from hazard-based to risk-based food safety approaches is increasingly recognized. Food-business-operators play a crucia…
View article: Site-selective modifications by lipid A phosphoethanolamine transferases linked to colistin resistance and bacterial fitness
Site-selective modifications by lipid A phosphoethanolamine transferases linked to colistin resistance and bacterial fitness Open
Genes encoding lipid A modifying phosphoethanolamine transferases (PETs) are genetically diverse and can confer resistance to colistin and antimicrobial peptides. To better understand the functional diversity of PETs, we characterized thre…