Research Publications (Food Safety)

Publication date: 12 June 2015
, Volume 177, Issues 3–4
Author(s): Tao He , Yang Wang , Minyi Qian , Congming Wu

Publication date: 12 June 2015
, Volume 177, Issues 3–4
Author(s): Sarah Wendlandt , Kristina Kadlec , Andrea T. Feßler , Stefan Schwarz

Publication date: 12 June 2015
, Volume 177, Issues 3–4
Author(s): Jingyu Wang , Chao Tang , Qiuzhen Wang , Ruiqiao Li , Zhanli Chen , Xueying Han , Jing Wang , Xingang Xu

Abstract

Hydroxytyrosol (HT) is the most prominent phenolic compound of virgin olive oil and due to its scientifically validated biological activities it is entering to the market as a potentially useful supplement for cardiovascular disease prevention. The aim of the present study was to investigate the relationship between the HT dose intake and its tissue uptake in rats, and thus, providing complementary information in relation to the target-dose relationship.

This study aimed to evaluate the effect of gelatin–alginate film containing 1.5% oregano essential oil (OEO) on the shelf life of rainbow trout (Oncorhynchus mykiss) slices during refrigerated storage over a period of 15 days. The blend film was prepared at 75% fish gelatin to 25% sodium alginate ratio and OEO was added to the film formulation.

Foodborne Pathogens and Disease , Vol. 0, No. 0.

Korean fermented soybean productssuch as doenjang, kochujang, ssamjang, and cho-kochujang, can harbor foodborne pathogens such as Bacillus cereus sensu lato (B. cereus sensu lato). The aim of this study was to characterize the toxin gene profiles, biochemical characteristics, and antibiotic resistance patterns of B. cereus sensu lato strains isolated from Korean fermented soybean products. Eighty-eight samples of Korean fermented soybean products purchased from retails in Seoul were tested.

Mac Brown, Leslie Moore, Benjamin McMahon, Dennis Powell, Montiago LaBute, James M. Hyman, Ariel Rivas, Mark Jankowski, Joel Berendzen, Jason Loeppky, Carrie Manore, Jeanne Fair

Marcel Jonges, Jeroen van Leuken, Inge Wouters, Guus Koch, Adam Meijer, Marion Koopmans

Elías Barquero-Calvo, Ricardo Mora-Cartín, Vilma Arce-Gorvel, Juana L. de Diego, Carlos Chacón-Díaz, Esteban Chaves-Olarte, Caterina Guzmán-Verri, Andre G. Buret, Jean-Pierre Gorvel, Edgardo Moreno

Abstract

Foodborne Pathogens and Disease , Vol. 0, No. 0.

The purpose of the study was to determine the effect of high-hydrostatic pressureHHP) on inactivation of human norovirus (HuNoV) in oysters and to evaluate organoleptic characteristics of oysters treated at pressure levels required for HuNoV inactivation. Genogroup I.1 (GI.1) or Genogroup II.4 (GII.4) HuNoV was inoculated into oysters and treated at 300 to 600 MPa at 25 and 0 °C for 2 min.

The objective of this work was to study the effect of high hydrostatic pressure combined with moderate heat to inactivate pressure-resistant bacteria in water-boiled salted duck meatWBSDM), and to establish suitable procedures to improve the quality of WBSDM. The conditions (300 MPa/60 °C, 400 MPa/60 °C, and 500 MPa/50 °C) effectively inactivated the pressure-resistant bacteria (Bacillus cereus and Staphylococcus warneri) in WBSDM. Although more pressure-resistant than S.

This study evaluated the efficacy of individual treatmentsthermosonication [TS+DW] and slightly acidic electrolyzed water [SAcEW]) and their combination on reducing Escherichia coli O157:H7, Listeria monocytogenes, and spoilage microorganisms (total bacterial counts [TBC], Enterobacteriaceae, Pseudomonas spp., and yeast and mold counts [YMC]) on fresh-cut kale.

The presence and species diversity of staphylococci in 250 ground beef and lamb meat samples obtained from DiyarbakirTurkey were investigated. The presence of the 16S rRNA gene, mecA, nuc, pvl, and femA was analyzed by multiplex PCR. Pheno- and genotypic antibiotic resistance profiles of 208 staphylococci isolates were established. Of the ground beef and ground lamb samples, 86.4% and 62.4% were positive for staphylococci, respectively. Staphylococcus aureus, S. saprophyticus, S. hominis, S.

In the Mediterranean areasalted and dried roe from the gray Mugil cephalus “bottarga” represent a speciality food with great commercial value. Bottarga is currently produced by a traditional handmade process and, the risk of human bacterial contamination during its manufacturing is still unknown; in this perspective the foodborne pathogen Staphylococcus aureus could potentially contaminate this product due to poor sanitation or bad handling during processing.

Publication date: 3 August 2015
, Volume 206
Author(s): Il-Hoon Cho , Arun Bhunia , Joseph Irudayaraj

Quorum sensing (QS) is widely used by bacteria to coordinate behavior in response to external stimuli. In Vibrio cholerae, this process is important for environmental survival and pathogenesis, though, intriguingly, a large percentage of natural isolates are QS deficient. Here, we show that QS-deficient mutants can spread as social cheaters by ceasing production of extracellular proteases under conditions requiring their growth.

Quinones and other oxygenated polycyclic aromatic hydrocarbons (oxy-PAHs) are toxic and/or genotoxic compounds observed to be cocontaminants at PAH-contaminated sites, but their formation and fate in contaminated environmental systems have not been well studied. Anthracene-9,10-dione (anthraquinone) has been found in most PAH-contaminated soils and sediments that have been analyzed for oxy-PAHs.

Zinc supplements are an effective clinical treatment for infantile diarrheal disease caused by enteric pathogens. Previous studies demonstrated that zinc acts on enteropathogenic Escherichia coli (EPEC) bacteria directly to suppress several virulence-related genes at a concentration that can be achieved by oral delivery of dietary zinc supplements.

We developed a novel process for efficient synthesis of l -threo-3-hydroxyaspartic acid ( l -THA) using microbial hydroxylase and hydrolase. A well-characterized mutant of asparagine hydroxylase (AsnO-D241N) and its homologous enzyme (SCO2693-D246N) were adaptable to the direct hydroxylation of l -aspartic acid; however, the yields were strictly low. Therefore, the highly stable and efficient wild-type asparagine hydroxylases AsnO and SCO2693 were employed to synthesize l -THA.

Campylobacter jejuni is a highly diverse species of bacteria commonly associated with infectious intestinal disease of humans and zoonotic carriage in poultry, cattle, pigs, and other animals. The species contains a large number of distinct clonal complexes that vary from host generalist lineages commonly found in poultry, livestock, and human disease cases to host-adapted specialized lineages primarily associated with livestock or poultry.

Escherichia coli O26 has been identified as the most common non-O157 Shiga toxin-producing E. coli (STEC) serogroup to cause human illnesses in the United States and has been implicated in outbreaks around the world. E. coli has high genomic plasticity, which facilitates the loss or acquisition of virulence genes. Attaching and effacing E.