Research Publications (Food Safety)

A reduced-sodium ready-to-eat (RTE) uncured turkey was manufactured with buffered dry vinegar treatments to validate the inhibition of Listeria monocytogenes and spoilage microflora and to determine the effects on sensory and quality attributes. Samples were stored at 4°C for 12 weeks, and the study was independently replicated three times. Two different five-strain inocula of L.

Staphylococcal food poisoning (SFP) is an important foodborne disease worldwide, and milk and milk products are commonly associated with SFP outbreaks. The objectives of this study were to investigate the distribution of staphylococcal enterotoxin (se) genes in Staphylococcus aureus from raw cow's milk and milk products and to assess their genetic background with the spa typing method.

Vibrio parahaemolyticus can cause serious human seafoodborne gastroenteritis and even death. In this study, we isolated and characterized 208 V. parahaemolyticus strains from 10 species of commonly consumed crustaceans and shellfish available in fish markets in Shanghai, People's Republic of China, in 2014. Most of these aquatic species had not been detected previously. The results revealed an extremely low occurrence of pathogenic V. parahaemolyticus carrying the toxin gene trh (1.9%).

The disinfectant and antimicrobial susceptibility profiles of 138 non-O157 Shiga toxin–producing Escherichia coli strains (STECs) from food animals and humans were determined. Antimicrobial resistance (AMR) was moderate (39.1% of strains) in response to 15 antimicrobial agents. Animal strains had a lower AMR prevalence (35.6%) than did human strains (43.9%) but a higher prevalence of the resistance profile GEN-KAN-TET.

The objective of this study was to determine antimicrobial resistance and elucidate the resistance mechanism in nontyphoidal Salmonella enterica serovars isolated from food products imported into the United States from 2011 to 2013. Food products contaminated with antimicrobial-resistant nontyphoidal S. enterica were mainly imported from Taiwan, Indonesia, Vietnam, and China. PCR, DNA sequencing, and plasmid analyses were used to characterize antimicrobial resistance determinants.

Asymptomatic Salmonella carriage in beef cattle is a food safety concern, and the beef feedlot environment may function as a reservoir of this pathogen. The goal of this study was to identify and isolate Salmonella and Salmonella bacteriophages from beef cattle feedlot environments in order to better understand the microbial ecology of Salmonella and identify phages that might be useful as anti-Salmonella beef safety interventions.

The objective of this study was to determine the immediate source of Escherichia coli on beef trimmings produced at a large packing plant by analyzing the E. coli on trimmings at various locations of a combo bin filled on the same day and of bins filled on different days. Ten 2,000-lb (907-kg) combo bins (B1 through B10) of trimmings were obtained from a large plant on 6 days over a period of 5 weeks.

After harvest, pistachios are hulled with mechanical abrasion and then separated in a float tank containing water; the nuts that float (~15%; floaters) and those that sink (~85%; sinkers) are dried and stored separately.

To the Editor: Carbapenems, antimicrobial drugs of last resort, are recommended only for severe community- and healthcare-associated multidrug-resistant bacterial infections. In Canada, carbapenem-resistant infection rates in hospitals remained low (<0.25 cases/1,000 patient admissions) over 5 years’ (2009–2014) surveillance (1). Carbapenemase-producing bacteria have rarely been detected in the food chain in industrialized countries.

Marcelo Mendonça, Gustavo Marçal Schmidt Garcia Moreira, Fabricio Rochedo Conceição, Michael Hust, Karla Sequeira Mendonça, Ângela Nunes Moreira, Rodrigo Correa França, Wladimir Padilha da Silva, Arun K. Bhunia, José Antonio G. Aleixo

Competitive exclusion (CE) cultures, given as a single dose on the day of hatch, together with good hygienic practices has been shown to be a novel approach to control Salmonella in poultry. The ability of the CE product Broilact and 2 probiotics, FloraMax-B11 and Colostrum, to prevent Salmonella colonization in newly hatched chickens was evaluated employing a slightly modified Mead-model chicken assay.

Publication date: 7 November 2016
, Volume 236

Author(s): María-Elena Álvarez-Suárez, Andrés Otero, María-Luisa García-López, Ghizlane Dahbi, Miguel Blanco, Azucena Mora, Jorge Blanco, Jesús A. Santos

Publication date: 7 November 2016
, Volume 236

Author(s): M. Mosquera-Fernández, P. Sanchez-Vizuete, R. Briandet, M.L. Cabo, E. Balsa-Canto

Publication date: December 2016
Source:LWT - Food Science and Technology, Volume 74

Author(s): Long-Feng Wang, Jong-Whan Rhim

Publication date: December 2016
Source:LWT - Food Science and Technology, Volume 74

Author(s): Na Ji, Chengzhen Liu, Shuangling Zhang, Liu Xiong, Qingjie Sun

Publication date: February 2017
, Volume 72, Part A

Author(s): Zeynal Topalcengiz, Michelle D. Danyluk

Abstract

Aims

The purpose of this study was to isolate, characterize and determine the structure and the antibacterial activities of a bacteriocin produced by Carnobacterium maltaromaticum CPN, a strain isolated from unpasteurized-milk Camembert cheese.

Danka Matijašević, Milena Pantić, Božidar Rašković, Vladimir Pavlović, Dunja Duvnjak, Aleksandra Sknepnek, Miomir Nikšić

Paolo R. Saraceni, Alejandro Romero, Antonio Figueras, Beatriz Novoa

Summary

Publication date: Available online 1 August 2016


Author(s): Li Bai, Daniel Hurley, Juan Li, Qiong Meng, Juan Wang, Séamus Fanning, Yanwen Xiong

Summary

Summary

Publication date: October 2016
, Volume 236

Author(s): Qin Hu, Dekang Zhu, Guangpeng Ma, Anchun Cheng, Mingshu Wang, Shun Chen, Renyong Jia, Mafeng Liu, Kunfeng Sun, Qiao Yang, Ying Wu, Xiaoyue Chen

Abstract

Aims

Our aim was to assess the effects of step-wise exposure to didecyl dimethyl ammonium chloride (DDAC) on the antimicrobial (antibiotics and biocides) susceptibilities of food-associated bacterial strains.