A5055743596- Salmonella and Campylobacter epidemiology
- Listeria monocytogenes in Food Safety
- Food Safety and Hygiene
- Viral gastroenteritis research and epidemiology
- Bacteriophages and microbial interactions
- Microbial Inactivation Methods
- Escherichia coli research studies
- Vibrio bacteria research studies
- Infant Nutrition and Health
- Identification and Quantification in Food
- Climate Change and Health Impacts
- Moringa oleifera research and applications
- Antimicrobial agents and applications
- Hepatitis Viruses Studies and Epidemiology
- Animal Disease Management and Epidemiology
- Antibiotic Use and Resistance
- Polyamine Metabolism and Applications
- Melamine detection and toxicity
- Insect and Pesticide Research
- Food Supply Chain Traceability
- Essential Oils and Antimicrobial Activity
- Data-Driven Disease Surveillance
- Infection Control in Healthcare
- Plant Disease Management Techniques
- Food Quality and Safety Studies
United States Food and Drug Administration
2017-2025
Center for Food Safety and Applied Nutrition
2018-2024
ORCID
2021
University of Minnesota
2007-2016
North Carolina State University
2008
In 2016, a multijurisdictional team investigated an outbreak of Shiga toxin-producing Escherichia coli (STEC) serogroup O121 and O26 infections linked to contaminated flour from large domestic producer.A case was defined as infection with strain in which illness onset between December 21, 2015, September 5, 2016. To identify exposures associated the outbreak, cases were compared non-STEC enteric cases, matched according age group, sex, state residence. Products suspected be related collected...
In 2021, the U.S. Food and Drug Administration (FDA), Centers for Disease Control Prevention (CDC), state partners investigated a multistate outbreak of Salmonella Typhimurium illnesses linked to packaged leafy greens from controlled environment agriculture (CEA) operation in Illinois. Thirty-one four hospitalizations were reported states, with significant epidemiologic signal Farm A. A traceback investigation included seven points service (POS) food exposure data eight ill people. Each POS...
The objective of this study was to isolate, identify and characterize a collection lytic bacteriophages capable infecting enterohaemorrhagic Escherichia coli (EHEC) serotypes.Phages were isolated from dairy cattle feedlot manure using E. O157, O26 O111 strains as hosts. Phages enriched faecal slurries by culture in 10× trypticase soy broth at 37°C overnight. Phage plaques obtained mixing the filtered supernatant with molten tryptone agar containing phage host strain, pouring inoculated on...
Keeping the global food supply safe necessitates international collaborations between countries. Health and regulatory agencies routinely communicate during foodborne illness outbreaks, allowing partners to share investigational evidence. A 2016-2020 outbreak of Listeria monocytogenes infections linked imported enoki mushrooms required a multinational collaborative investigation among United States, Canada, Australia, France. Ultimately, this included 48 ill people, 36 in States 12 was...
Banked human milk, processed using low-temperature/long-time or Holder pasteurization, inactivates pathogenic microorganisms but degrades important biochemical components. High-pressure processing kinetics favor inactivation of with retention activity and nutritional quality foods. The effects high-pressure (400 MPa) pasteurization (62.5°C, 30 minutes) on total immunoglobulin A lysozyme in milk were investigated. Indirect modified enzyme-linked immunosorbent a Micrococcus lysodeikticus...
Leafy greens contaminated with Shiga toxin-producing Escherichia coli have continued to cause foodborne illness outbreaks in recent years and present a threat public health. An important component of outbreak investigations is determining the source vehicle through traceback investigations. The U.S. Food Drug Administration home investigation experts who use standardized process initiate, execute, interpret results collaboration Centers for Disease Control Prevention state local partners....
In 2021, the U.S. Food and Drug Administration (FDA), Centers for Disease Control Prevention (CDC), state local health regulatory partners investigated an outbreak of
Foodborne outbreak investigations have traditionally included the detection of a cluster illnesses first, followed by an epidemiologic investigation to identify food interest. The increasing use whole genome sequencing (WGS) subtyping technology for clinical, environmental, and isolates foodborne pathogens, ability share compare data on public platforms, present new opportunities earlier links between their potential sources. We describe process called sample-initiated retrospective (SIROIs)...
In 2016, the U.S. Food and Drug Administration (FDA), Centers for Disease Control Prevention (CDC), state partners investigated nine Listeria monocytogenes infections linked to frozen vegetables. The investigation began with two environmental L. isolates recovered from Manufacturer A, primarily a processor of onions, that were match by whole genome sequencing (WGS) eight clinical historical onion limited collection details. Epidemiologic information, product distribution, laboratory evidence...
Foodborne hepatitis A illnesses and outbreaks have been associated with consumption of ready-to-eat foods contaminated the feces person(s) shedding virus (HAV). Outbreaks linked to fresh frozen produce imported from countries where HAV is endemic, hygiene sanitation are inadequate, or food safety standards lacking unenforced. In 2022 2023, federal, state, international partners investigated two multijurisdictional infections involving same genotype IA strain organic strawberries sourced a...
During August-October 2020, United States federal, state, and Canadian partners investigated an outbreak of Salmonella Enteritidis infections, in the U.S. Canada, linked to fresh, whole peaches packed supplied by a grower packer with multiple orchards (Farm A). In U.S., total 101 ill people 28 hospitalizations were reported 17 states, while 57 12 two provinces. The traceback investigation included 14 points service (POS), representing 18 illnesses eight states. Multiple distributors,...
The Centers for Disease Control and Prevention (CDC), working closely with public health regulatory partners, investigate outbreaks of foodborne illness. Outbreak investigations continue to identify melons as an important source outbreak-associated We characterized the epidemiology linked from 2012-2021, summarized responses these outbreaks, identified potential opportunities prevention efforts interventions. queried CDC's Foodborne Surveillance System (FDOSS) all Salmonella, Escherichia...
Leafy greens are a reoccurring source of Shiga toxin-producing Escherichia coli (STEC) outbreaks. We summarize data from farm investigations following STEC outbreaks linked to leafy conducted by the Food and Drug Administration (FDA), Centers for Disease Control Prevention (CDC), state local partners, during 2009-2021. Investigational laboratory on multi-state were collected 2009-2021 CDC's Foodborne Outbreak Surveillance System FDA's Coordinated Response & Evaluation Network. Farm...
Vibrio parahaemolyticus is the leading cause of seafood-related foodborne illness globally. In 2018, U.S. federal, state, and local public health regulatory partners investigated a multistate outbreak V. infections linked to crabmeat that resulted in 26 ill people nine hospitalizations. State Food Drug Administration (FDA) laboratories recovered parahaemolyticus, Salmonella spp., Listeria monocytogenes isolates from samples collected various points distribution conducted phylogenetic...
The United States are one of the world's leading consumers melons. In 2020, Food and Drug Administration (FDA), Centers for Disease Control Prevention (CDC), state health regulatory partners investigated an outbreak
Abstract Background. In September 2012, the Centers for Disease Control and Prevention (CDC), U.S. Food Drug Administration (FDA), state local partners investigated an outbreak of Salmonella enterica serovar Bredeney linked to peanut butter (PB). Methods. A case was defined as infection with strain between June 1, 2012 October 31, 2012. exposure questionnaires were analyzed by CDC determine food vehicle. The FDA reviewed production information from Retail Chain A's sole supplier PB, Company...