Research Publications (Food Safety)

by Renjie Du, Yuejun Qu, Min Zhao, Yanhong Liu, Phoebe X. Qi, Xingbin Sun Olive leaf extract (OLE) has been increasingly recognized as a natural and effective antimicrobial against a host of foodborne pathogens. This study attempts to predict the minimum inhibitory concentration (MIC) of OLE against Listeria monocytogenes F2365 by utilizing the asymptotic deceleration point (PDA) in a logistic model (LM), namely MIC-PDA.

Journal of Food Safety, EarlyView. The washing step is necessary to remove biological and physical hazards from minimally processed vegetables. Nevertheless, the risk of foodborne diseases could persist even after washing due to postsanitizing contamination, and little is known about the antimicrobial effect of residual sanitizers.

Antidesma thwaitesianum Müll. Arg. or Mao is well-known in Thailand for its use in soft drinks and wine. This study investigated the potential of its fruit juice as a food preservative based on its antimicrobial activity against food-borne pathogens and spoilage.

A study was conducted to evaluate a new organic produce wash composed of a combination of organic acids and hydrogen peroxide, in the form of a mixed peroxyacid solution, against foodborne pathogens.  The mixed peroxyacid, composed of lactic acid, hydrogen peroxide and one or more fruit acids, was challenged against Salmonella enterica, E.

Food safety can be compromised by some bioactive compounds such as biogenic amines that can be specially found in fermented foods due to the bacterial decarboxylation of some amino acids by fermentative or spoilage bacteria. Cava lees are a winery by-product rich in fiber and phenolic compounds and previous works have raised their revalorization from a food safety point of view.

Currently, it is extremely important to identify and describe new alternative compounds with potential antimicrobial properties. Since various natural biological systems are capable of producing active compounds with such properties, many of them have been the subject of intensive study. The aim of this work was to heterologously overexpress, purify and preliminarily investigate the antimicrobial activity of a novel bacteriocin found in Salmonella species.

Salmonella enterica Serotype 4,[5],12:i:- ( STM ) has become an increasing burden for food safety. This strain has been often detected in swine products. STM -contaminated feed, water or air were given to weanling pigs in order to determine possible STM transmission routes. A control group of pigs was also sampled. STM was monitored daily in feces and by rectal and nasal swabs.

Pulsed light (PL) is a nonthermal treatment that kills microorganisms by exposing them to short-duration pulses of high-intensity broad-spectrum light. This study evaluated the PL inactivation of different serotypes of Salmonella enterica subsp. Enterica (Typhimurium, Enteritidis, Heidelberg, and Minnesota) to specifically assess how pulse width and voltage can affect treatment effectiveness.

So far there is no internationally accepted, standardized method for MIC determination of natural substances such as essential oils (EOs). The aim of this study was to elucidate how much the MIC values obtained from various studies using different culture media are comparable.

Background

Salmonella Derby is one of the most predominant Salmonella serotypes that seriously threatens food safety. This bacterium can be further differentiated to sub-populations with different population sizes; however, whether and how the S. Derby–gut microbiota interactions affect epidemic patterns of S. Derby sub-populations remain largely unknown.

Results

Honey is a natural food consisting mainly of sugars, enzymes, amino acids, organic acids, vitamins, minerals and aromatic substances. In addition to specific organoleptic properties, honey also has other components that contribute to its nutritional and health value. Proteins, vitamins, minerals, organic acids and phenolic compounds, the most variable components of honey, are predominantly responsible for its strong bioactive effect.

by Nawar Naseer, Marisa S. Egan, Valeria M. Reyes Ruiz, William P. Scott, Emma N. Hunter, Tabitha Demissie, Isabella Rauch, Igor E. Brodsky, Sunny Shin Salmonella enterica serovar Typhimurium is a Gram-negative pathogen that uses two distinct type III secretion systems (T3SSs), termed Salmonella pathogenicity island (SPI)-1 and SPI-2, to deliver virulence factors into the host cell.

by Ziyu Sun, Mandlaa, Hui Wen, Li Ma, Zhongjun Chen Salmonella is a common foodborne pathogen, especially in meat and meat products. Lytic phages are promising alternatives to conventional methods for Salmonella biocontrol in food and food processing.

With the rapid emergence and dissemination of antimicrobial resistance (AMR) genes in bacteria from animal, animal-derived food and human clinic, it is of great significance to develop new approaches to combat the multidrug-resistant bacteria. This study presented a short linear antimicrobial peptide RW-BP100-4D, which was derived from RW-BP100 (RRLFRRILRWL-NH2) by transforming the N-terminal 4th amino acid from L- to D-enantiomer.

Salmonella enterica serovar Typhimurium (S. Typhimurium) is a zoonotic pathogen that can cause food poisoning and diarrhea in both humans and animals worldwide. The Salmonella pathogenicity island (SPI) genes encoded type III secretion system (T3SS) is important for S. Typhimurium invasion and replication in host cells. Due to the increasing problem of antibiotic resistance, antibiotic treatment for clinical Salmonella infection has gradually been limited.

The present study challenges the in vivo assessment of cold atmospheric pressure plasma (CAPP) technology on the bioactive activity (antioxidant/antiaging and antimicrobial potential) of Spirulina powder, using Caenorhabditis elegans as an animal model. Surface microdischarge cold atmospheric pressure plasma (SMD-CAPP) treatment was 3.3 W discharge power for 7 min. C.

Developing sensitive assay for pathogen detection is a sustained demand for food scientists, industries, and government. In this study, an ultrasensitive colorimetric lateral flow assay (LFA) was successfully developed for the detection of Salmonella typhimurium (S. typhimurium). Based on cascade enzyme reaction induced by horseradish peroxidase (HRP)-encapsulated starch-based liposome, the sensitivity of the conventional LFA can be dramatically improved.

Zoonoses and Public Health, EarlyView. Objective We describe the epidemiology of live poultry-associated salmonellosis (LPAS) and investigate potential risk factors associated with hospitalization among adults aged ≥65 years in the United States during 2008–2017.

This study aimed to develop a combination of immunomagnetic separation (IMS) and real-time PCR (qPCR) techniques to detect and analyze Salmonella spp. (SAL), Listeria monocytogenes (LM), and Escherichia coli O157:H7 (O157: H7) in meat samples quickly and accurately. Bacteria-specific immunomagnetic beads (IMBs) were prepared from carboxyl magnetic beads and affinity-purified polyclonal antibodies using a novel magnetic bead activator.

Translational fidelity is maintained by multiple quality control steps in all three domains of life. Increased translational errors (mistranslation) occur due to genetic mutations and external stresses. Severe mistranslation is generally harmful, but moderate levels of mistranslation may be favored under certain conditions. To date, little is known about the link between translational fidelity and host–pathogen interactions.

Journal of Applied Microbiology, Volume 132, Issue 2, Page 872-889, February 2022. This systematic review focuses on obtaining the most relevant information from multiple studies that detected a mobilized colistin resistance mcr gene in Salmonella for a better comprehension of its global distribution.

Journal of Applied Microbiology, Volume 132, Issue 2, Page 1503-1517, February 2022. This study evaluated detection methods for Salmonella Typhi (S.

Journal of Applied Microbiology, Volume 132, Issue 2, Page 1449-1456, February 2022. Aims We investigated the fate of Salmonella in lettuce seeds grown in a hydroponic system and the potentials of applying photodynamic inactivation (PDI) to enhance microbial safety of hydroponic farming systems. Methods and Results Lettuce was grown from Salmonella-contaminated seeds, and rose bengal-mediated PDI was applied.

Our previous survey revealed a poor microbial quality of, and the presence of Salmonella on leafy green vegetables grown/sold in Accra, Ghana.  This study validated the efficacy of some cleaning/sanitation methods commonly used by Ghanaian households (tap water, salt solution, lemon juice, and vinegar), by comparing them with the performance of several sanitation approaches used by the U.S.

Foods contaminated by foodborne pathogens have always been a great threat to human life. Herein, we constructed an electrochemical immunosensor for Salmonella detection by using a Fe3O4@graphene modified electrode.