Molly Leeper
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View article: Reoccurring <i>Salmonella</i> Cotham Outbreak Linked to Pet Bearded Dragons — United States, 2024
Reoccurring <i>Salmonella</i> Cotham Outbreak Linked to Pet Bearded Dragons — United States, 2024 Open
In April 2024, CDC's PulseNet identified a cluster of seven Salmonella Cotham cases from five states. Isolates were highly related by whole genome sequencing (WGS), and one patient reported contact with a pet bearded dragon. CDC initiated …
View article: Validation of Core and Whole-Genome Multi-Locus Sequence Typing Schemes for Shiga-Toxin-Producing E. coli (STEC) Outbreak Detection in a National Surveillance Network, PulseNet 2.0, USA
Validation of Core and Whole-Genome Multi-Locus Sequence Typing Schemes for Shiga-Toxin-Producing E. coli (STEC) Outbreak Detection in a National Surveillance Network, PulseNet 2.0, USA Open
Shiga-toxin-producing E. coli (STEC) is a leading causing of bacterial foodborne and zoonotic illnesses in the USA. Whole-genome sequencing (WGS) is a powerful tool used in public health and microbiology for the detection, surveillance, an…
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: Genomic Characterization of <i>Escherichia coli</i> O157:H7 Associated with Multiple Sources, United States
Genomic Characterization of <i>Escherichia coli</i> O157:H7 Associated with Multiple Sources, United States Open
In the United States, Shiga toxin-producing Escherichia coli (STEC) outbreaks cause >265,000 infections and cost $280 million annually. We investigated REPEXH01, a persistent strain of STEC O157:H7 associated with multiple sources, includi…
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: Shiga Toxin–Producing <i>Escherichia coli</i> O157:H7 Illness Outbreak Associated with Untreated, Pressurized, Municipal Irrigation Water — Utah, 2023
Shiga Toxin–Producing <i>Escherichia coli</i> O157:H7 Illness Outbreak Associated with Untreated, Pressurized, Municipal Irrigation Water — Utah, 2023 Open
During July-September 2023, an outbreak of Shiga toxin-producing Escherichia coli O157:H7 illness among children in city A, Utah, caused 13 confirmed illnesses; seven patients were hospitalized, including two with hemolytic uremic syndrome…
View article: Evaluation of whole and core genome multilocus sequence typing allele schemes for Salmonella enterica outbreak detection in a national surveillance network, PulseNet USA
Evaluation of whole and core genome multilocus sequence typing allele schemes for Salmonella enterica outbreak detection in a national surveillance network, PulseNet USA Open
Salmonella enterica is a leading cause of bacterial foodborne and zoonotic illnesses in the United States. For this study, we applied four different whole genome sequencing (WGS)-based subtyping methods: high quality single-nucleotide poly…
View article: An investigation of an outbreak of Salmonella Newport infections linked to melons – United States, 2020
An investigation of an outbreak of Salmonella Newport infections linked to melons – United States, 2020 Open
View article: Trends in Toxin Profiles of Human Shiga Toxin-Producing Escherichia Coli (STEC) O157 Strains, United States, 1996-2008
Trends in Toxin Profiles of Human Shiga Toxin-Producing Escherichia Coli (STEC) O157 Strains, United States, 1996-2008 Open
Shiga toxin-producing E. coli (STEC) cause diarrhea, hemorrhagic colitis, and hemolytic uremic syndrome (HUS). All STEC produce one or both of two Shiga toxins, Stx1 and Stx2. STEC strains that produce Stx2 are more strongly associated wit…
View article: <i>Salmonella</i> illness outbreaks linked to backyard poultry purchasing during the COVID-19 pandemic: United States, 2020
<i>Salmonella</i> illness outbreaks linked to backyard poultry purchasing during the COVID-19 pandemic: United States, 2020 Open
Poultry contact is a risk factor for zoonotic transmission of non-typhoidal Salmonella spp. Salmonella illness outbreaks in the United States are identified by PulseNet, the national laboratory network for enteric disease surveillance. Dur…
View article: Update on Extensively Drug-Resistant <i>Salmonella</i> Serotype Typhi Infections Among Travelers to or from Pakistan and Report of Ceftriaxone-Resistant <i>Salmonella</i> Serotype Typhi Infections Among Travelers to Iraq — United States, 2018–2019
Update on Extensively Drug-Resistant <i>Salmonella</i> Serotype Typhi Infections Among Travelers to or from Pakistan and Report of Ceftriaxone-Resistant <i>Salmonella</i> Serotype Typhi Infections Among Travelers to Iraq — United States, 2018–2019 Open
Ceftriaxone-resistant Salmonella enterica serotype Typhi (Typhi), the bacterium that causes typhoid fever, is a growing public health threat. Extensively drug-resistant (XDR) Typhi is resistant to ceftriaxone and other antibiotics used for…
View article: Multidrug-Resistant<i>Salmonella</i>Serotype Anatum in Travelers and Seafood from Asia, United States
Multidrug-Resistant<i>Salmonella</i>Serotype Anatum in Travelers and Seafood from Asia, United States Open
A multidrug-resistant Salmonella enterica serotype Anatum strain reported in Taiwan was isolated in the United States from patients and from seafood imported from Asia. Isolates harbored 11 resistance determinants, including quinolone and …
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: Multistate Outbreak of <i>Salmonella</i> Infections Linked to Raw Turkey Products — United States, 2017–2019
Multistate Outbreak of <i>Salmonella</i> Infections Linked to Raw Turkey Products — United States, 2017–2019 Open
View article: Multidrug-Resistant Salmonella I 4,[5],12:i:− and Salmonella Infantis Infections Linked to Whole Roasted Pigs from a Single Slaughter and Processing Facility
Multidrug-Resistant Salmonella I 4,[5],12:i:− and Salmonella Infantis Infections Linked to Whole Roasted Pigs from a Single Slaughter and Processing Facility Open
View article: Multistate outbreaks of <i>Salmonella</i> infections linked to imported Maradol papayas – United States, December 2016–September 2017
Multistate outbreaks of <i>Salmonella</i> infections linked to imported Maradol papayas – United States, December 2016–September 2017 Open
Foodborne salmonellosis causes approximately 1 million illnesses annually in the United States. In the summer of 2017, we investigated four multistate outbreaks of Salmonella infections associated with Maradol papayas imported from four Me…
View article: Protracted Outbreak of <i>Salmonella</i> Newport Infections Linked to Ground Beef: Possible Role of Dairy Cows — 21 States, 2016–2017
Protracted Outbreak of <i>Salmonella</i> Newport Infections Linked to Ground Beef: Possible Role of Dairy Cows — 21 States, 2016–2017 Open
In January 2017, CDC identified a cluster of Salmonella enterica serotype Newport infections with isolates sharing an indistinguishable pulsed-field gel electrophoresis (PFGE) pattern, JJPX01.0010 (pattern 10), through PulseNet, the nation…