Research Publications (Food Safety)

This cross-sectional study determined the occurrence, risk factors and characteristics of Salmonella isolated from imported broiler hatching fertile eggs, hatcheries, and broiler farms in Trinidad and Tobago. Standard methods were used to isolate and characterize Salmonella isolates from two broiler hatcheries and 27 broiler farms in the country.

A series of proof of concept studies were developed to determine if a commercial bacteriophage (phage) cocktail could be utilized for the mitigation of Salmonella in bovine peripheral lymph nodes (LN). The first objective sought to determine if exogenous phage could be isolated from the LN following administration. If successful, the second objective sought to determine if once in the LN, could the phage effectively reduce Salmonella .

Salmonella is the leading cause of bacterial foodborne zoonoses in humans. Thus, the development of strategies to control bacterial pathogens in poultry is essential. Peanut skins, a considerable waste by-product of the peanut industry is discarded and of little economic value. However, peanut skins contain polyphenolic compounds identified that have antimicrobial properties.

Third-generation cephalosporins (3GCs) are preferred treatments for serious human Salmonella enterica infections. Beef cattle are suspected to contribute to human 3GC-resistant Salmonella infections. Commensal 3GC-resistant Escherichia coli are thought to act as reservoirs of 3GC resistance since they are more frequently isolated than 3GC-resistant Salmonella at beef cattle feedyards.

The objective of the present study was to analyze the prevalence of Salmonella in multiple food commodities in China by performing a meta-analysis. Accordingly, we screened studies that examined the prevalence of Salmonella in PubMed, Embase, and Web of Science databases. Methodological quality assessment and heterogeneity analyses were performed for included studies. The prevalence rate with the 95% confidence interval (95% CI) was selected as the effect size.

Salmonella enterica is well-known for its ability to survive and persist in low-moisture environments.

Fish oil inclusion into a dry pet food provides a source of long-chain omega-3 fatty acids. Polyunsaturated fatty acids (PUFA) in fish oil have antibacterial activity against various foodborne pathogens such as Salmonella and pathogenic Escherichia coli. The purpose of this study was to determine the effect of temperature applied to dry pet food kibbles on the antimicrobial activity of Menhaden fish oil against Salmonella spp.

Beef is rich in various nutrients while easily spoils due to contamination by pathogens, thus it is of great significance to develop a bactericidal method to inactivate meat-borne pathogens and meanwhile maintain the freshness of beef.

Foodborne Salmonellosis is commonly associated with poultry and poultry products necessitating continued development of pre- and post-harvest food safety interventions and risk management strategies. Evaluating technologies and strategies is limited by availability of cost-effective, rapid laboratory methods.

Salmonella continues to be a significant cause of foodborne illnesses in human medicine. The Centers for Disease Control and Prevention reported Salmonella as the second leading cause of foodborne illness in the United States, and the leading cause of both hospitalizations and deaths. Salmonella enterica 4,[5],12:i:- (STM) is a monophasic variant of S. Typhimurium and it is an emerging threat to both human and animal health.

Meat contamination by Salmonella enterica is a serious public health concern. Available studies have suggested that biofilm formation at processing plants and the contaminated contact surfaces might contribute to meat contamination.

The object of this study was to examine non-thermal treatments to reduce foodborne pathogens in raw beef. Foodborne-illness pathogens were inoculated in the raw beef.

In this study, we evaluated the microbial contamination status of cold dishes consumed by residents of Jilin Province and investigated to determine the incidence of four pathogenic bacteria in cold dishes. A total of 300 samples of cold dishes including meat, vegetable and mixed products, were collected from three different purchasing places: supermarkets, farmers' markets and mobile vendors.

Author(s): Mahmoud Elafify, Wageh Sobhy Darwish, Marwa El-Toukhy, Basma M. Badawy, Rehab E. Mohamed, Radwa Reda Shata The present study aimed at investigation of the prevalence and antimicrobial susceptibility of Salmonella spp. in the retailed dairies in Egypt.

Author(s): Iolanda Nicolau-Lapeña, Pilar Colás-Medà, Inmaculada Viñas, Isabel Alegre Following the market trends, the consumption of fresh and cold-pressed juice in Europe is increasing. However, a primary concern – particularly in apple juice – is the related outbreaks caused by food-borne pathogens.

Author(s): J. Ortiz-Solà, P. Colás-Medà, I. Nicolau-Lapeña, I. Alegre, M. Abadias, I. Viñas Fresh fruits, especially strawberries, are usually consumed raw without any step to ensure their food safety. Salmonella enterica is one of the most important etiologic agents for foodborne diseases throughout the world and its ability to respond to some stress responses makes it even more dangerous. In the present investigation, we study the survival of S.

Author(s): Gayani Weerasooriya, Samiullah Khan, Kapil K. Chousalkar, Andrea R. McWhorter Campylobacter jejuni and Salmonella Typhimurium are major foodborne pathogens that cause gastrointestinal infections in humans. Humans can acquire either bacterial species through the consumption of contaminated poultry meat.

Introduction. Salmonella enterica serovar Typhi (S. Typhi) is the etiological agent of typhoid fever. To establish an infection in the human host, this pathogen must survive the presence of bile salts in the gut and gallbladder.

With the rapid emergence of plasmid-mediated colistin resistance gene mcr-1, the increased resistance of Salmonella has attracted extensive attention. This study reports on 11 multidrug-resistant Salmonella enterica serovar Typhimurium strains harboring mcr-1 in China. They all presented resistance to colistin, and additionally, one that was isolated from a child’s stool sample was also resistant to ceftriaxone and azithromycin.

Author(s): Banu Sezer, Emine Kübra Tayyarcan, Ismail Hakki Boyaci The physicochemical quality and the effectiveness of antimicrobial activity against Salmonella and phage stability of dip-coated strawberries were investigated in this study by using bacteriophage cocktail with four different biopolymers for a period of 5 day at +4°Ϲ.

Author(s): Yunge Liu, Yimin Zhang, Lixian Zhu, Lebao Niu, Xin Luo, Pengcheng Dong The development of the stationary-phase, low-pH-inducible acid tolerance response (ATR) in the Salmonella contaminant of beef during the processing arises food safety concerns, because it may evoke bacterial coping mechanisms against bactericidal insults and alter gene expression that contribute to pathogen virulence.

Author(s): Jing-Guo Xu, Hui-Xue Hu, Bei-Zhong Han, Jing-Yu Chen Foodborne pathogens tend to live in mixed-species biofilms with resident flora in the food industry, likely posing a higher risk of pathogen contamination due to the strong biofilm formation and disinfectant resistance.

Author(s): John G. Bruno A simpler visible colorimetric and less expensive syringe enzymatic filter-based assay (SEFA) utilizing proven anti-Salmonella DNA aptamers is described which is based on a similar previously published fluorometric version of SEFA with larger filter units.

Author(s): Thomas Rawson Multiple foodborne routes of Salmonella infection have been observed; however, the majority of the literature to date has been dominated by research into the most frequently observed reservoirs, such as chicken, beef, and pork. While less commonly observed, outbreaks of Salmonella within sheep meat still occur, requiring extensive investigation by food safety inspectors.

The level of pathogens in poultry litter used for raising broiler chickens is critical to the overall health of a broiler chicken flock and food safety. Therefore, it is imperative that methods used for determining bacterial concentration in litter are accurate and reproducible across studies.