Research Publications (Food Safety)

Publication date: 16 March 2015
, Volume 197
Author(s): Tiago Casella , María Margarita Rodríguez , Juliana Tiemi Takahashi , Barbara Ghiglione , Milena Dropa , Ednei Assunção , Maurício Lacerda Nogueira , Nilton Lincopan , Gabriel Gutkind , Mara Corrêa Lelles Nogueira

Publication date: 16 March 2015
, Volume 197
Author(s): Kathryn A. Whitehead , Sebastien Olivier , Paul S. Benson , Nils Arneborg , Joanna Verran , Peter Kelly

James R. J. Haycocks, Prateek Sharma, Anne M. Stringer, Joseph T. Wade, David C. Grainger

Publication date: January 2015
, Volume 305, Issue 1
Author(s): Mashkoor Mohsin , Sebastian Guenther , Peter Schierack , Karsten Tedin , Lothar H. Wieler

Publication date: June 2015
, Volume 52
Author(s): A.Y. Ramos-Villarroel , O. Martín-Belloso , R. Soliva-Fortuny

Publication date: June 2015
, Volume 52
Author(s): Klementina Kirezieva , Pieternel A. Luning , Liesbeth Jacxsens , Ana Allende , Gro S. Johannessen , Eduardo César Tondo , Andreja Rajkovic , Mieke Uyttendaele , Martinus A.J.S. van Boekel

Publication date: June 2015
, Volume 52
Author(s): Haiquan Liu , Liqun Lu , Yingjie Pan , Xiaohong Sun , Cheng-An Hwang , Yong Zhao , Vivian C.H. Wu

A comparison was made of the effect of atmospheres containing high oxygen (70% O2 and 30% CO2) or high nitrogen (70% N2 and 30% CO2) on the spoilage process during storage (at 4°C) of poultry fillets. Four samples of each gas atmosphere were analyzed at 7 sample points during storage.

Consumption of contaminated poultry meat is still an important cause of Salmonella infections in humans. Colonization inhibition (CI) occurs when a live Salmonella strain is administered to chickens and subsequently protects against challenge with another Salmonella strain belonging to the same serotype.

We recently developed a novel selection method based on identification and selection of chickens with an inherently high and low phenotype of pro-inflammatory mediators, including interleukin (IL)-6, CXCLi2, and CCLi2. The resultant high line of chickens is more resistant to Salmonella enterica serovar Enteritidis (Salmonella Enteritidis) compared to the low line.

Aims
To investigate the pathogenic potential and genotypic diversity of Yersinia enterocolitica biotype 2 strains isolated in Brazil and to compare these strains with other Y. enterocolitica biotypes using ERIC-PCR and PFGE.

Aims
Listeriosis is a frequent silage-associated disease in ruminants. The slugs Arion vulgaris are invaders in gardens, vegetable crops and meadows for silage production. Field and laboratory studies were conducted to clarify whether slugs could host Listeria monocytogenes and thereby constitute a threat to animal feed safety.

Publication date: 25 February 2015
, Volume 175, Issues 2–4
Author(s): Fernando L. Leite , Timothy A. Reinhardt , John P. Bannantine , Judith R. Stabel

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

Publication date: 2 April 2015
, Volume 198
Author(s): Tareq M. Osaili , Anas A. Al-Nabulsi , Ziad Jaradat , Reyad R. Shaker , Dalia Z. Alomari , Maher M. Al-Dabbas , Akram R. Alaboudi , Mohammad Q. Al-Natour , Richard A. Holley

Publication date: 2 April 2015
, Volume 198
Author(s): Kristin Weidemaier , Erin Carruthers , Adam Curry , Melody Kuroda , Eric Fallows , Joseph Thomas , Douglas Sherman , Mark Muldoon

Publication date: Available online 13 January 2015

Author(s): Sakshi Kohli , Yadvir Singh , Divya Tej Sowpati , Nasreen Z. Ehtesham , Ulrich Dobrindt , Jörg Hacker , Seyed E. Hasnain

Salmonella Typhimurium isolate D23580 represents a recently identified ST313 lineage of invasive non-Typhoidal Salmonellae (iNTS). One of the differences between this lineage and other non-iNTS S. Typhimurium isolates is the presence of prophage BTP1. This prophage encodes a gtrC gene, implicated in O-antigen modification. GtrCBTP1 is essential for maintaining O-antigen length in isolate D23580, since a gtrBTP1 mutant yields a short O-antigen.

Campylobacter jejuni is a leading cause of food-borne gastroenteritis in humans. It lives commensally in the gastrointestinal tract of animals, and tolerates variable conditions during transit/colonization of susceptible hosts. The C. jejuni CprRS two-component system contains an essential response regulator (CprR), and deletion of the cprS sensor kinase enhances biofilms. We sought to identify CprRS-regulated genes and better understand how the system affects survival.

Catalase enzymes detoxify H2O2 by the dismutation of H2O2 into O2 and H2O through the use of hemin cofactors. While the structure and biochemical properties of catalase enzymes have been well characterized over many decades of research, it remained unclear how catalases acquire hemin. We have previously reported that Cj1386 is essential for ensuring proper hemin content in Campylobacter jejuni catalase (KatA).

We evaluated the use of matrix-assisted laser desorption ionization–time of flight mass spectrometry (MS) for the identification of Vibrio cholerae. MS identified all 42 isolates of V. cholerae O1 and O139 and 7 of 9 non-O1/O139 isolates. MS correctly discriminated between all Aeromonas and V. cholerae isolates. Overall, MS performed as well as or better than biochemical methods.

The genus Yersinia is a large and diverse bacterial genus consisting of human-pathogenic species, a fish-pathogenic species, and a large number of environmental species. Recently, the phylogenetic and population structure of the entire genus was elucidated through the genome sequence data of 241 strains encompassing every known species in the genus.

An occurrence of Vibrio cholerae non-O1/O139 gastroenteritis in the U.S. Gulf Coast is reported here. Genomic analysis revealed that the isolate lacked known virulence factors associated with the clinical outcome of a V. cholerae infection but did contain putative genomic islands and other accessory virulence factors. Many of these factors are widespread among environmental strains of V. cholerae, suggesting that there might be additional virulence factors in non-O1/O139 V.

Yersinia enterocolitica and Yersinia pseudotuberculosis, the two Yersinia species that are enteropathogenic for humans, are distributed worldwide and frequently cause diarrhea in inhabitants of temperate and cold countries. Y. enterocolitica is a major cause of foodborne disease resulting from consumption of contaminated pork meat and is further associated with substantial economic cost.

Publication date: February 2015
, Volume 98, Issue 2
Author(s): Hossein Jamali , Mohammadjavad Paydar , Behrad Radmehr , Salmah Ismail