Research Publications (Food Safety)

Publication date: September 2016
, Volume 58

Author(s): P. Truchado, F. Lopez-Galvez, M.I. Gil, F. Pedrero-Salcedo, J.J. Alarcón, A. Allende

Publication date: September 2016
, Volume 58

Author(s): Arthur Hinton

Publication date: September 2016
, Volume 58

Author(s): Yijing Zhou, Mukund V. Karwe, Karl R. Matthews

Publication date: September 2016
, Volume 58

Author(s): Elisabetta Lambertini, Abhinav Mishra, Miao Guo, Huilin Cao, Robert L. Buchanan, Abani K. Pradhan

Jana Kamanova, Hui Sun, Maria Lara-Tejero, Jorge E. Galán

Abstract

Online Ahead of Print.

Publication date: October 2016
, Volume 68

Author(s): Mahboubeh Mirhosseini, Maede Afzali

Online Ahead of Print.

Shell eggs can be contaminated with many types of microorganisms, including bacterial pathogens, and thus present a risk for the transmission of foodborne disease to consumers. Currently, most United States egg processors utilize egg washing and sanitization systems to decontaminate surfaces of shell eggs prior to packaging.

The efficacy of the commercial competitive exclusion product Broilact against Campylobacter jejuni was evaluated in broiler chickens in a 5-week pilot-scale study. Newly-hatched broiler chicks were brought from a commercial hatchery. After arrival 50 seeder chicks were challenged orally with approximately 103 cfu of C. jejuni, wing marked, and placed back in a delivery box and moved to a separate room. The rest of the chicks (contact chicks) were placed in floor pens, 100 chicks per pen.

The housing of laying hens is important for social, industrial, and regulatory aspects. Many studies have compared hen housing systems on the research farm, but few have fully examined commercial housing systems and management strategies. The current study compared hens housed in commercial cage-free aviary, conventional cage, and enriched colony cage systems.

Limitations in quality bedding material have resulted in the growing need to re-use litter during broiler farming in some countries, which can be of concern from a food-safety perspective. The aim of this study was to compare the Campylobacter levels in ceca and litter across three litter treatments under commercial farming conditions.

The gut-brain axis is known to modulate behavioral and immune responses in animals; evidence supporting this modulation in chickens, however, is elusive. Here, we analyzed the effects of heat stress and/or Clostridium perfringens (CP) infection on behavior, intestinal morphology, brain activity, and corticosterone serum levels in chickens.

Lisa Del Bel Belluz, Riccardo Guidi, Ioannis S. Pateras, Laura Levi, Boris Mihaljevic, Syed Fazle Rouf, Marie Wrande, Marco Candela, Silvia Turroni, Claudia Nastasi, Clarissa Consolandi, Clelia Peano, Toma Tebaldi, Gabriella Viero, Vassilis G. Gorgoulis, Thorbjørn Krejsgaard, Mikael Rhen, Teresa Frisan

Publication date: Available online 6 April 2016


Author(s): Christiane Cuny, Phillippe Arnold, Julia Hermes, Tim Eckmanns, Jaishri Merhaj, Sonja Schoenfelder, Wilma Ziebuhr, Qin Zhao, Yang Wang, Andrea T. Feßler, Gérard Krause, Stefan Schwarz, Wolfgang Witte

Publication date: Available online 6 April 2016


Author(s): V. Carfora, G. Giacinti, D. Sagrafoli, N. Marri, G. Giangolini, P. Alba, F. Feltrin, L. Sorbara, R. Amoruso, A. Caprioli, S. Amatiste, A. Battisti

Publication date: Available online 6 April 2016


Author(s): Olga Wellnitz, Christina Zbinden, Xiao Huang, Rupert M. Bruckmaier

The hands and noses of food handlers colonized by Staphylococcus aureus are an important source of food contamination in restaurants and food processing. Several virulence factors can be carried by mobile elements in strains of S. aureus, including the immune evasion cluster (IEC). This gene cluster improves the capacity of S. aureus to evade the human immune response.

The prevalence of human pathogenic Yersinia enterocolitica was determined in tonsil and intestinal content samples from 388 healthy fattening pigs at the four biggest Finnish slaughterhouses. These slaughterhouses process 73% of pigs in Finland. Tonsil samples were tested by PCR targeted for yadA, and intestinal samples were cultured. All pathogenic Y. enterocolitica isolates represented bioserotype 4/O:3. The prevalence of Y.

Salmonella Typhimurium is a potential feed safety hazard in animal feed ingredients. Thermal mitigation of Salmonella spp. during rendering is effective but does not eliminate the potential for cross-contamination. Therefore, the objective of this experiment was to evaluate the effectiveness of chemicals to mitigate postrendering Salmonella Typhimurium ATCC 14028 contamination in rendered proteins over time.

Shiga toxin–producing Escherichia coli (STEC) strains produce extracellular cellulose and colanic acid, which may influence stress tolerance. This study investigates the role of these extracellular polymers on the tolerance of STEC to chlorine treatment after attachment to lettuce and spinach. Four STEC strains, two wild-type cellulose-producing and their cellulose-deficient derivatives, were used. One strain pair produced colanic acid in addition to cellulose.

A total of 43 Salmonella enterica isolates belonging to different serovars (Salmonella Albany, Salmonella Agona, Salmonella Corvallis, Salmonella Stanley, Salmonella Typhimurium, Salmonella Mikawasima, and Salmonella Bovis-morbificans) were isolated from catfish (Clarias gariepinus) and tilapia (Tilapia mossambica) obtained from nine wet markets and eight ponds in Penang, Malaysia.

The quality and safety of meat products can be estimated by assessing their contamination by hygiene indicator microorganisms and some foodborne pathogens, with Listeria monocytogenes as a major concern. To identify the main sources of microbiological contamination in the processing environment of three butcher shops, surface samples were obtained from the hands of employees, tables, knives, inside butcher displays, grinders, and meat tenderizers (24 samples per point).

The aim of this study was to determine the time for a 3-log CFU/g outgrowth of Staphylococcus aureus and its toxin production in previously frozen precooked tuna meat (albacore [Thunnus alalunga] prepared as loin, chunk, and flake or skipjack [Katsuwonus pelamis] prepared as chunk and flake) held either at 21 or 27°C. A five-strain cocktail of enterotoxin-producing S. aureus was surface inoculated with ~103 CFU/g onto tuna samples.