Research Publications (Food Safety)

Avocado (Persea americana Mill.) fruit hang on the tree in a physiologically mature but unripe state for many months. We hypothesised that this was due to an on-tree ripening block that prevents the development of ethylene sensitivity in the fruit. Physiologically mature fruit, determined by size and dry matter content, were categorised into ethylene sensitive or insensitive based on whether an ethylene treatment at harvest accelerated ripening.

Present study is focused on exploring in vitro antimicrobial activity of ginseng extract (GE) against Staphylococcus aureus, Salmonella Typhimurium and Listeria monocytogenes and their biofilm forming ability, then determining its antimicrobial efficiency during the storage (4 and 10 °C) of cooked ground beef contaminated with these pathogens. Results revealed that the minimum inhibitory concentration (MIC) for S. aureus, S. typhimurium and L.

Vibrio parahaemolyticus is a food-borne pathogen that poses a serious threat to seafood safety and human health. An efficient, nontoxic, and sustainable disinfection material with a stable structure is urgently needed. Herein, silver (Ag)-hydroxyapatite (HAP) composite catalysts were prepared using HAP derived from waste fish bones. The Ag2.50%-HAP showed a 100% disinfection rate against V.

The study investigated the impact of UV-C irradiation on peach fruit quality during postharvest storage, with a focus on aroma changes and the mechanisms involving lipoxygenase metabolism. Results showed that UV-C irradiation at a dosage of 1.5 kJ/m2 was found to preserve the quality attributes of peach fruit during ambient storage, as evidenced by high flesh firmness, inhibition of weight loss and respiration rate, as well as high values of L* and ascorbic acid.

Potato dry rot is a global problem caused by Fusarium species. Symptoms of dry rot include wrinkled brown to black patches of tissue. Fusarium spp. infection in potato tubers results in the formation of mycotoxins. Fungi that cause dry rot are commonly Fusarium sambucinum and Fusarium solani.

Abstract Nanosensors have become an indispensable tool in the food sector due to their specificity and sensitivity. The biosensor consists of a transducer coupled with a biorecognition component to transform biological signal into digital signal. Nanobiosensors have been widely used for sensing toxic chemicals such as pesticide residues and pathogenic microbes owing to their accurate sensitivity in an affordable manner, which gives more hope to the food industry on their applications.

The intestinal epithelium performs essential physiological functions, such as nutrient absorption, and acts as a barrier to prevent the entry of harmful substances. Mycotoxins are prevalent contaminants found ...

Fruits and vegetables are susceptible to Listeria monocytogenes. In this study, the nano emulsion of oregano essential oil (OEO) prepared by ultrasonic (US) nanoemulsion method combined with US has a promising synergistic bactericidal effect on L. monocytogenes, with 255 W/cm2+0.06 μL/mL origano essential oil nanoemulsion (OEONE) completely kill the initial number of bacteria (8.67 ± 0.17 log CFU/mL) after 15 min of treatment.

An animal infection model was evaluated on sheep and goats to confirm which species infected with Salmonella enterica serovar Enteritidis C StR (SE13) would provide a consistent and high frequency of Salmonella colonization in lymph nodes (LNs) without causing undue animal morbidity. Sheep and goats (n=5) were intradermally inoculated with Salmonella, post-incubated for 7 days, and euthanized.

Between 2013 and 2021 there were three reported salmonellosis outbreaks in North America linked to consumption of cashew cheese analogs that were prepared from soaked and fermented cashews. The behavior of Salmonella was evaluated during fermentation of cashews to better understand the risks associated with plant-based fermentations.

Escherichia coli O157:H7, Salmonella enteritidis, and Staphylococcus aureus are widely present in food and can cause serious and large-scale cases of illness worldwide every year. Herein, we developed a triplex immunomagnetic separation (IMS) combined with loop-mediated isothermal amplification (LAMP) on a microfluidic chip (triplex IMS-mLAMP) for the simultaneous detection of these three important foodborne pathogenic bacteria.

Cd (cadmium) is a highly toxic heavy metal pollutant often present in soil and detrimentally impacting the production and quality of horticultural crops. Cd affects various physiological and biochemical processes in plants, including chlorophyll synthesis, photosynthesis, mineral uptake and accumulation, and hormonal imbalance, leading to cell death. The MYB family of transcription factors plays a significant role in plant response to environmental influences.

Antimicrobial resistance (AMR) is a global emerging problem for food safety and public health. Retail meat is one of the vehicles that may transmit antimicrobial resistant bacteria to humans. Here we assessed the phenotypic and genotypic resistance of non-typhoidal Salmonella from retail meat collected in California in 2019 by the National Antimicrobial Resistance Monitoring System (NARMS) Retail Food Surveillance program.

This study investigated the effects of Cinnamomum osmophloeum leaf hot-water extract (CLWE) on nonspecific immune responses and resistance to Vibrio parahaemolyticus in white shrimp (Penaeus vannamei). Firstly, a cell viability assay demonstrated that the CLWE is safe to white shrimp heamocytes in the concentration of 0–500 mg L−1.

This study addresses the limited tools available for assessing food safety risks from cytotoxic Bacillus cereus group strains in contaminated food. We quantified the growth, in skim milk broth, of 17 cytotoxic B. cereus strains across 6 phylogenetic groups with various virulence gene profiles. The strains did not grow in HTST milk at 4 or 6°C. At 10°C, 15 strains exhibited growth; at 8°C, one strain grew; and all strains grew at temperatures ≥ 14°C.

Salmonella, a prominent foodborne pathogen, has posed enduring challenges to the advancement of food safety and global public health. The escalating concern over antibiotic misuse, resulting in the excessive presence of drug residues in animal-derived food products, necessitates urgent exploration of alternative strategies for Salmonella control. Bacteriophages emerge as promising green biocontrol agents against pathogenic bacteria.

Food safety is of global public health concern. Hotels and their restaurants provide hospitality like accommodation and food services and are spearheaded by food handlers who have varied experiences. This study was undertaken to examine knowledge, attitude, and practices (KAP) on food safety and explore knowledge‐practice gaps among food handlers at hotels in Ghana.

The following reports on the efficacy of a gas‐phase hydroxyl radical‐based process for decontaminating shredded lettuce on a laboratory and simulated commercial scale. The process is based on the ultraviolet light at 254 nm UV‐C‐mediated degradation of hydrogen peroxide mist and ozone gas to generate antimicrobial hydroxyl radicals. Escherichia coli K12 was applied as a surrogate for E.

The levels of patulin contamination in fruit juices showed a discernible decline from 2014 to 2022 within the Chinese market. According to risk assessment, the average daily intake of patulin did not present a threat to public health. Summary Excessive patulin contamination in fruit juice products pose a significant risk to human health.

Salmonella enterica serovar Derby causes foodborne disease (FBD) outbreaks worldwide, mainly from contaminated pork but also from chickens. During a major epidemic of FBD in Uruguay due to S. enteritidis from poultry, we conducted a large survey of commercially available eggs, where we isolated many S. enteritidis strains but surprisingly also a much larger number (ratio 5:1) of S. Derby strains. No single case of S. Derby infection was detected in that period, suggesting that the S.

Bone infections caused by Staphylococcus aureus may lead to an inflammatory condition called osteomyelitis, which results in progressive bone loss. Biofilm formation, intracellular survival, and the ability of S. aureus to evade the immune response result in recurrent and persistent infections that present significant challenges in treating osteomyelitis.

The aim of this study is to investigate the occurrence of plasmid mediated quinolone resistance (PMQR) determinants in Campylobacter coli isolates collected from broilers, laying hens and poultry farm environments. One hundred and thirty-nine C. coli isolates were isolated from broilers (n = 41), laying hens (n = 53), eggs (n = 4) and the environment (n = 41) of 23 poultry farms located in northeastern of Tunisia.

The extract is produced from mangosteen peels, tested for its antimicrobial activities and applied to beef burgers as a natural preservative to replace artificial ones. Summary This study aimed to investigate the efficiency of mangosteen peel extract (MPE) in preservation of beef burgers. MPE was first evaluated for its total phenolic content (TPC), total flavonoid content (TFC) and antioxidant and antimicrobial activities.

Tetracyclines (TCs) residues in animal-based foods may cause consumer poisoning or allergic reactions, as well as resistance of pathogenic microorganisms. Therefore, a method to accurately monitor TCs is urgently needed. Here, a sensitive and greenificated molecularly imprinted fluorescent sensor (CDs@MIP) for detecting TCs residues using non-covalent imprinting binding method has been synthesized in a simple and safe manner.

Postharvest pear fruits are susceptible to fungal decay and patulin (PAT) contamination during storage and transportation. PAT is a harmful mycotoxin contaminant of fruits and fruit products. Our team has identified a strain of Hannaella sinensis through preliminary research and validated its ability to degrade PAT in vitro. However, whether H. sinensis can effectively combat postharvest diseases of pears and control PAT within the fruit was yet unknown.