Jason P. Folster
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View article: The Salmonella enterica serotype Hadar pangenome: Population structure and dynamics of a zoonotic pathogen
The Salmonella enterica serotype Hadar pangenome: Population structure and dynamics of a zoonotic pathogen Open
The bacterial accessory genome, comprised of plasmids, phages, and other mobile elements, underpins the adaptability of bacterial populations. Pangenome (core and accessory) analysis of pathogens can reveal epidemiological relatedness miss…
View article: Azithromycin-resistant mph(A)-positive Salmonella enterica serovar Typhi in the United States
Azithromycin-resistant mph(A)-positive Salmonella enterica serovar Typhi in the United States Open
Cases of typhoid fever caused by Typhi strains resistant to all available oral treatment options are cause for concern and support the need for vaccination of travellers to Typhi endemic regions. US genomic surveillance serves as an import…
View article: Genetic Diversity in Salmonella enterica in Outbreaks of Foodborne and Zoonotic Origin in the USA in 2006–2017
Genetic Diversity in Salmonella enterica in Outbreaks of Foodborne and Zoonotic Origin in the USA in 2006–2017 Open
Whole genome sequencing is replacing traditional laboratory surveillance methods as the primary tool to track and characterize clusters and outbreaks of the foodborne and zoonotic pathogen Salmonella enterica (S. enterica). In this study, …
View article: Mobile genetic elements define the non-random structure of the <i>Salmonella enterica</i> serovar Typhi pangenome
Mobile genetic elements define the non-random structure of the <i>Salmonella enterica</i> serovar Typhi pangenome Open
Bacterial relatedness measured using select chromosomal loci forms the basis of public health genomic surveillance. While approximating vertical evolution through this approach has proven exceptionally valuable for understanding pathogen d…
View article: Strain of Multidrug-Resistant <i>Salmonella</i> Newport Remains Linked to Travel to Mexico and U.S. Beef Products — United States, 2021–2022
Strain of Multidrug-Resistant <i>Salmonella</i> Newport Remains Linked to Travel to Mexico and U.S. Beef Products — United States, 2021–2022 Open
In 2016, CDC identified a multidrug-resistant (MDR) strain of Salmonella enterica serotype Newport that is now monitored as a persisting strain (REPJJP01). Isolates have been obtained from U.S. residents in all 50 states and the District o…
View article: Harnessing the pangenome for genomic surveillance:<i>Salmonella enterica</i>serotype Typhi as a paradigm
Harnessing the pangenome for genomic surveillance:<i>Salmonella enterica</i>serotype Typhi as a paradigm Open
Public health genomic surveillance systems typically measure genome relatedness and infer molecular epidemiological relationships using chromosomal loci alone – an approximation of vertical evolution, or homology-by-descent. The accessory …
View article: Genome Sequences from a Reemergence of Vibrio cholerae in Haiti, 2022 Reveal Relatedness to Previously Circulating Strains
Genome Sequences from a Reemergence of Vibrio cholerae in Haiti, 2022 Reveal Relatedness to Previously Circulating Strains Open
After more than 3 years without a documented cholera case, the Republic of Haiti reported its first resurgent case on 30 September 2022 (1–3). As of 18 February 2023, more than 27,000 cholera cases have been hospitalized and 594 deaths con…
View article: Increased Multidrug-Resistant<i>Salmonella</i><i>enterica</i>I Serotype 4,[5],12:i:- Infections Associated with Pork, United States, 2009–2018
Increased Multidrug-Resistant<i>Salmonella</i><i>enterica</i>I Serotype 4,[5],12:i:- Infections Associated with Pork, United States, 2009–2018 Open
Reports of Salmonella enterica I serotype 4,[5],12:i:- infections resistant to ampicillin, streptomycin, sulphamethoxazole, and tetracycline (ASSuT) have been increasing. We analyzed data from 5 national surveillance systems to describe th…
View article: 1367. Resistance to Ceftriaxone and Ciprofloxacin in Nontyphoidal <i>Salmonella</i> from Humans and Relatedness to Isolates from Animal Sources
1367. Resistance to Ceftriaxone and Ciprofloxacin in Nontyphoidal <i>Salmonella</i> from Humans and Relatedness to Isolates from Animal Sources Open
Background Nontyphoidal Salmonella (NTS) is a leading cause of foodborne bacterial infections. Annually, ∼200,000 antimicrobial-resistant (AMR) NTS illnesses occur in the United States. NTS infections resistant to ceftriaxone and ciproflox…
View article: Genome Sequences of 18 Salmonella enterica Serotype Hadar Strains Collected from Patients in the United States
Genome Sequences of 18 Salmonella enterica Serotype Hadar Strains Collected from Patients in the United States Open
Despite being linked to a number of recent poultry-associated outbreaks in the United States, few reference genomes are available for Salmonella enterica serotype Hadar. Here, we address this need by reporting 18 Salmonella Hadar genomes f…
View article: Genomic Diversity, Antimicrobial Resistance, and Virulence Gene Profiles of <i>Salmonella</i> Serovar Kentucky Isolated from Humans, Food, and Animal Ceca Content Sources in the United States
Genomic Diversity, Antimicrobial Resistance, and Virulence Gene Profiles of <i>Salmonella</i> Serovar Kentucky Isolated from Humans, Food, and Animal Ceca Content Sources in the United States Open
Salmonella serovar Kentucky is frequently isolated from chickens and dairy cattle, but recovery from humans is comparatively low based on the U.S. National Antimicrobial Resistance Monitoring System (NARMS) reports. We aimed to bett…
View article: Five Complete <i>Salmonella enterica</i> Serotype Reading Genomes Recovered from Patients in the United States
Five Complete <i>Salmonella enterica</i> Serotype Reading Genomes Recovered from Patients in the United States Open
Between 2018 and 2019, Salmonella enterica serotype Reading caused a large, multistate outbreak linked to contact with raw turkey products in the United States. Here, we provide five Salmonella Reading reference genomes collected from US p…
View article: Fourteen <i>mcr</i> -1-Positive Salmonella enterica Isolates Recovered from Travelers Returning to the United States from the Dominican Republic
Fourteen <i>mcr</i> -1-Positive Salmonella enterica Isolates Recovered from Travelers Returning to the United States from the Dominican Republic Open
In the United States, reports of Salmonella enterica carrying mcr -1 remain rare in humans, but when observed, the infection is often associated with travel. Here, we report 14 mcr -1-positive Salmonella enterica isolates from patients in …
View article: Correlation between Phenotypic and In Silico Detection of Antimicrobial Resistance in Salmonella enterica in Canada Using Staramr
Correlation between Phenotypic and In Silico Detection of Antimicrobial Resistance in Salmonella enterica in Canada Using Staramr Open
Whole genome sequencing (WGS) of Salmonella supports both molecular typing and detection of antimicrobial resistance (AMR). Here, we evaluated the correlation between phenotypic antimicrobial susceptibility testing (AST) and in silico pred…
View article: Outbreak of Multidrug-Resistant<i>Salmonella</i>Heidelberg Infections Linked to Dairy Calf Exposure, United States, 2015–2018
Outbreak of Multidrug-Resistant<i>Salmonella</i>Heidelberg Infections Linked to Dairy Calf Exposure, United States, 2015–2018 Open
In August 2016, the Wisconsin Department of Health Services notified the U.S. Centers for Disease Control and Prevention of multidrug-resistant (MDR) Salmonella enterica serovar Heidelberg infections in people who reported contact w…
View article: Increased Incidence of Antimicrobial-Resistant Nontyphoidal <i>Salmonella</i> Infections, United States, 2004–2016
Increased Incidence of Antimicrobial-Resistant Nontyphoidal <i>Salmonella</i> Infections, United States, 2004–2016 Open
Salmonella is a major cause of foodborne illness in the United States, and antimicrobial-resistant strains pose a serious threat to public health. We used Bayesian hierarchical models of culture-confirmed infections during 2004-2016 from 2…
View article: Carriage and Gene Content Variability of the pESI-Like Plasmid Associated with Salmonella Infantis Recently Established in United States Poultry Production
Carriage and Gene Content Variability of the pESI-Like Plasmid Associated with Salmonella Infantis Recently Established in United States Poultry Production Open
Salmonella Infantis carrying extended spectrum β-lactamase blaCTX-M-65 on a pESI-like megaplasmid has recently emerged in United States poultry. In order to determine the carriage rate and gene content variability of this plasmid in U.S. S…
View article: 714. Increase in Multidrug-resistant <i>Salmonella</i> Serotype I 4,[5],12:i:- Infections Linked to Pork—United States, 2009–2018
714. Increase in Multidrug-resistant <i>Salmonella</i> Serotype I 4,[5],12:i:- Infections Linked to Pork—United States, 2009–2018 Open
Background Salmonella enterica I 4,[5],12:i:- is the 5th most common serotype causing clinical Salmonella infections in the United States. A strain with resistance to ampicillin, streptomycin, sulfamethoxazole, and tetracycline (ASSuT) has…
View article: 132. Emergence and Spread of Multidrug-resistant <i>salmonella</i> Serotype Infantis Infections in the United States, 2003–2018
132. Emergence and Spread of Multidrug-resistant <i>salmonella</i> Serotype Infantis Infections in the United States, 2003–2018 Open
Background Infantis re-emerged as a leading Salmonella serotype when a multidrug-resistant (MDR) strain with a rare extended spectrum β-lactamase (ESBL) blaCTX-M-65 gene emerged among returned travelers from Peru in 2012 and then spread do…
View article: Comparison of Molecular Subtyping and Antimicrobial Resistance Detection Methods Used in a Large Multistate Outbreak of Extensively Drug-Resistant Campylobacter jejuni Infections Linked to Pet Store Puppies
Comparison of Molecular Subtyping and Antimicrobial Resistance Detection Methods Used in a Large Multistate Outbreak of Extensively Drug-Resistant Campylobacter jejuni Infections Linked to Pet Store Puppies Open
Campylobacter jejuni is a leading cause of enteric bacterial illness in the United States. Traditional molecular subtyping methods, such as pulsed-field gel electrophoresis (PFGE) and 7-gene multilocus sequence typing (MLST), provided limi…
View article: Emergence of a Novel Salmonella enterica Serotype Reading Clonal Group Is Linked to Its Expansion in Commercial Turkey Production, Resulting in Unanticipated Human Illness in North America
Emergence of a Novel Salmonella enterica Serotype Reading Clonal Group Is Linked to Its Expansion in Commercial Turkey Production, Resulting in Unanticipated Human Illness in North America Open
Increasingly, outbreak investigations involving foodborne pathogens are difficult due to the interconnectedness of food animal production and distribution, and homogeneous nature of industry integration, necessitating high-resolution genom…
View article: Sequencing and Characterization of Five Extensively Drug-Resistant Salmonella enterica Serotype Typhi Isolates Implicated in Human Infections from Punjab, Pakistan
Sequencing and Characterization of Five Extensively Drug-Resistant Salmonella enterica Serotype Typhi Isolates Implicated in Human Infections from Punjab, Pakistan Open
A large outbreak of extensively drug-resistant (XDR) Salmonella enterica serotype Typhi infections is ongoing in Pakistan, predominantly in Sindh Province. Here, we report the sequencing and characterization of five XDR Salmonella Typhi is…
View article: Erratum for Feldgarden et al., “Validating the AMRFinder Tool and Resistance Gene Database by Using Antimicrobial Resistance Genotype-Phenotype Correlations in a Collection of Isolates”
Erratum for Feldgarden et al., “Validating the AMRFinder Tool and Resistance Gene Database by Using Antimicrobial Resistance Genotype-Phenotype Correlations in a Collection of Isolates” Open
View article: Identification and characterization of Shigella with decreased susceptibility to azithromycin in the United States, 2005 to 2014
Identification and characterization of Shigella with decreased susceptibility to azithromycin in the United States, 2005 to 2014 Open
View article: Corrigendum: Whole Genome Sequencing: Bridging One-Health Surveillance of Foodborne Diseases
Corrigendum: Whole Genome Sequencing: Bridging One-Health Surveillance of Foodborne Diseases Open
[This corrects the article DOI: 10.3389/fpubh.2019.00172.].
View article: Emergence of a novel<i>Salmonella enterica</i>serotype Reading clone is linked to its expansion in commercial turkey production, resulting in unanticipated human illness in North America
Emergence of a novel<i>Salmonella enterica</i>serotype Reading clone is linked to its expansion in commercial turkey production, resulting in unanticipated human illness in North America Open
Concurrent separate human outbreaks of Salmonella enterica serotype Reading occurred in 2017-2019 in the United States and Canada, which were both linked to the consumption of raw turkey products. In this study, a comprehensive genomic inv…
View article: Novel Quinolone Resistance Determinant, <i>qepA8</i> , in Shigella flexneri Isolated in the United States in 2016
Novel Quinolone Resistance Determinant, <i>qepA8</i> , in Shigella flexneri Isolated in the United States in 2016 Open
Enterobacteriaceae, quinolone resistance is largely attributed to mutations in the quinolone resistance-determining regions (QRDR) of gyrA, gyrB, parC, and parE, and plasmid-italiciated quinolone resistance (PMQ…
View article: Validating the AMRFinder Tool and Resistance Gene Database by Using Antimicrobial Resistance Genotype-Phenotype Correlations in a Collection of Isolates
Validating the AMRFinder Tool and Resistance Gene Database by Using Antimicrobial Resistance Genotype-Phenotype Correlations in a Collection of Isolates Open
Antimicrobial resistance (AMR) is a major public health problem that requires publicly available tools for rapid analysis. To identify AMR genes in whole-genome sequences, the National Center for Biotechnology Information (NCBI) has produc…
View article: Novel quinolone resistance determinant, <i>qepA8</i>, in <i>Shigella flexneri</i> isolated in the United States, 2016
Novel quinolone resistance determinant, <i>qepA8</i>, in <i>Shigella flexneri</i> isolated in the United States, 2016 Open
A qepA8 + Shigella flexneri was cultured from the stool of a traveler returning from India and East Asia. This chromosomally encoded qepA variant, has a six-base insertion, and may have been mobilized as part of a complex IS 1- mediated co…
View article: Whole Genome Sequencing: Bridging One-Health Surveillance of Foodborne Diseases
Whole Genome Sequencing: Bridging One-Health Surveillance of Foodborne Diseases Open
Infections caused by pathogens commonly acquired from consumption of food are not always transmitted by that route. They may also be transmitted through contact to animals, other humans or the environment. Additionally, many outbreaks are …