Research Publications (Food Safety)

Author(s): Priscila R. Guerra, Gang Liu, Sebastien Lemire, Arkadiusz Nawrockic, Egle Kudirkiene, Jakob Møller-Jensen, John E. Olsen, Lotte Jelsbak

Author(s): Kyle Ganz, Etsuko Yamamoto, Kate Hardie, Christine Hum, Hussein Hussein, Annie Locas, Marina Steele

A study was undertaken to develop a user‐friendly, software tool (ValT) for validation of predictive models based on the acceptable prediction zones (APZ) method. ValT was developed in Excel and was demonstrated using a newly developed growth model for Salmonella and chicken skin. The model provided acceptable predictions when the proportion (p) of residuals in the APZ was ≥ 0.70 and there were no local prediction problems.

Author(s): Ganyu Gu, Samantha Bolten, Joseph Mowery, Yaguang Luo, Connor Gulbronson, Xiangwu Nou

Author(s): Jocelyn Medina-Gudiño, Andres Rivera-Garcia, Liliana Santos-Ferro, Juan C. Ramirez-Orejel, Lourdes T. Agredano-Moreno, Luis F. Jimenez-Garcia, David Paez-Esquiliano, Sandra Martinez-Vidal, Eduardo Andrade-Esquivel, Jose A. Cano-Buendia

Contamination of edible produce leaves with human bacterial pathogens has been associated with serious disease outbreaks and has become a major public health concern affecting all aspects of the market, from farmers to consumers. While pathogen populations residing on the surface of ready-to-eat produce can be potentially removed through thorough washing, there is no disinfection technology available that effectively eliminates internal bacterial populations.

Author(s): Zhiwei Li, Wenjuan Ma, Wanning Li, Yifeng Ding, Yu Zhang, Qile Yang, Jia Wang, Xiaohong Wang

Author(s): Hao Cheng, Muhammad Aslam Khan, Zhenfeng Xie, Shengnan Tao, Yunxing Li, Li Liang

Author(s): Jinru Chen, Yin Wang

The study evaluated the antibacterial activity of chlorogenic acid (CA) against Salmonella Enteritidis S1, a foodborne pathogen in chilled fresh chicken. Its minimum inhibitory concentration for S. Enteritidis S1 was 2 mM. 1 MIC CA treatment reduced the viable count of S. Enteritidis S1 by 3 log cfu/g in chilled fresh chicken. Scanning electron microscopy examination indicated that CA induced the cell envelope damage of S. Enteritidis S1.

The aim of this study was the assessment of the effect of time exposure, temperature, distance, and organic contaminants on radiant catalytic ionization (RCI) microbicidal effectiveness. The number of all examined bacteria decreased together with time exposure of RCI. The lowest recovery was obtained, both from the rubber surface (6.36 log CFU × cm–2) and steel (6.04 log CFU × cm–2) in the case of Escherichia coli O157:H7.

The incidence of Salmonella enterica infection resulting from consumption of chicken products has historically been elevated in British Columbia compared with the rest of Canada. Raw frozen breaded chicken products are often implicated as the source of infection as there is a potential for consumers to not cook these products adequately.

In situ generation of chlorine dioxide to reduce microbial populations on produce surfaces has been shown to be effective on produce models. This study examined the treatment for decontamination of bacterial pathogens on whole cantaloupes and sprout seeds.

Antimicrobial-resistant bacteria are a major public health problem. Of particular importance in the context of food safety is the prevalence of antimicrobial resistance (AMR) genes within nontyphoidal Salmonella, which is a leading bacterial cause of foodborne disease. We determined the prevalence of AMR genes across a very large number of Salmonella genomes (n = 25,647) collected from isolates from 16 common food sources.

ABSTRACT

Salmonella enterica serovar Dublin is a cattle-adapted S. enterica serovar causing both intestinal and systemic infection in its bovine host, and it is also a serious threat to human health. The present study aimed to determine the population structure of S. Dublin isolates obtained from Danish cattle herds and to investigate how cattle isolates relate to Danish human isolates, as well as to non-Danish human and bovine isolates.

Current California agricultural practices strive to comanage food safety and habitat conservation on farmland. However, the ecology of foodborne pathogens in wild bird populations, especially those avian species residing in proximity to fresh produce production fields, is not fully understood. In this repeated cross-sectional study, avifauna within agricultural lands in California were sampled over 1 year.

: The influence of the intestinal microbiota, such as Lactobacillus, on the intestinal mucosa, particularly intestinal stem cells, remains incompletely understood. In this study, mice and intestinal organoids were used to explore the regulatory effect of Lactobacillus on the proliferation and differentiation of intestinal epithelial cells. Methods and results: This study demonstrated that S. typhimurium caused intestinal epithelial damage and affected growth of intestinal organoids. S.

Author(s): N. de Bruijn, C. Ter Veen, A. Heuvelink, A. Feberwee

Pig manure may contain antibiotic residues, antibiotic-resistant bacteria or pathogens, which may reach the environment upon fertilization. During this study, 69 antibiotic residues belonging to 12 classes were quantified in 89 pig slurry samples. These samples were also studied for the presence of Salmonella and for E. coli resistant to meropenem, colistin, ciprofloxacin, or cefotaxim. The obtained isolates were further tested for antibacterial susceptibility.

We report here the closed genomes of Salmonella enterica strains from the 2017–2018 multistrain, multistate kratom outbreak using single-molecule real-time DNA sequencing. Four of the genomes consist of one circular chromosome, and the fifth has a circular chromosome and a single plasmid.

The non-steroidal anti-inflammatory pharmaceuticals ketoprofen, meloxicam, and tenoxicam were degraded by photo-assisted peroxidation (hv/H2O2) and photo-Fenton processes under simulated solar radiation (sunlight) and UV-C. Preliminary studies showed that the processes under UV-C and sun-photo-Fenton radiation showed similar degradation results. The sun-photo-Fenton was less sensitive to the concentration variation of the H2O2 oxidant.

Author(s): Xi Bai, Matteo Campagnoli, Sophie Butot, Thierry Putallaz, Lise Michot, Sophie Zuber

Author(s): Abdelrahim H.A. Hassan, Catherine N. Cutter

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