Research Publications (Food Safety)

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

Author(s): Rowaida K.S. Khalil, Mohamed A.E. Gomaa

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We observed multidrug resistance in 10 (91%) of 11 Shigella isolates from a diarrheal surveillance study in Cambodia. One isolate was resistant to fluoroquinolones and cephalosporins and showed decreased susceptibility to azithromycin. We found mutations in gyrA, parC, β-lactamase, and mphA genes. Multidrug resistance increases concern about shigellosis treatment options.

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Memory γδ T cells are important for the clearance of Listeria monocytogenes infection in the intestinal mucosa. However, the mechanisms by which memory γδ T cells provide protection against secondary oral infection are poorly understood. Here we used a recombinant strain of L. monocytogenes that efficiently invades the intestinal epithelium...

Publication date: 7 November 2016
, Volume 236

Author(s): Abigail B. Snyder, Jennifer J. Perry, Ahmed E. Yousef

Abstract

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

Author(s): Fan Li, Guoyang Xie, Baoqing Zhou, Pei Yu, Shuang Yu, Zoraida P. Aguilar, Hua Wei, Hengyi Xu

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

Author(s): Nilgün Öncül, Şeniz Karabıyıklı

Susana Merino, Juan M. Tomás

Shigellae are sensitive indicator species for studying trends in the international transmission of antimicrobial-resistant Enterobacteriaceae. Orthodox Jewish communities (OJCs) are a known risk group for shigellosis; Shigella sonnei is cyclically epidemic in OJCs in Israel, and sporadic outbreaks occur in OJCs elsewhere. We generated whole-genome sequences for 437 isolates of S.

To the Editor: The etiologic agent of the sixth pandemic of cholera was classical biotype of Vibrio cholerae O1. The ongoing seventh pandemic is caused by El Tor biotype. The biotypes are differentiated by phenotypic and genotypic characteristics. However, this differentiation blurred when V. cholerae O1 strains were detected in Matlab, Bangladesh, in 2006, in which characteristics were mixed.

Publication date: Available online 25 July 2016
Food Science and Human Wellness

Author(s): Kristen A. Lozinak, Niketa Jani, Jayanthi Gangiredla, Isha Patel, Christopher A. Elkins, Zonglin Hu, Prince Kassim, Robert A. Myers, Pongpan Laksanalamai

Alexandra Irrgang, Nicole Roschanski, Bernd-Alois Tenhagen, Mirjam Grobbel, Tanja Skladnikiewicz-Ziemer, Katharina Thomas, Uwe Roesler, Annemarie Käsbohrer

Listeria monocytogenes is a significant foodborne human pathogen that can cause severe disease in certain high-risk individuals. L. monocytogenes is known to produce high molecular weight, phage tail-like bacteriocins, "monocins", upon induction of the SOS system. In this work we purified and characterized monocins and found them to be a new class of F-type bacteriocins. The L.

Enteroaggregative Escherichia coli (EAEC) causes acute or persistent diarrhea. The aggR gene is widely used as a marker for typical EAEC. The heterogeneity of EAEC is well known; however, there are few reports on the phylogenetic relationships of EAEC. Recently, CTX-M extended-spectrum β-lactamase (ESBL)-producing EAEC strains have been reported worldwide. To characterize EAEC strains in Japan, we investigated the population structure of EAEC.

Human infections with Salmonella enterica subspecies enterica serovar Senftenberg are often associated with exposure to poultry flocks, farm environments, or contaminated food. The recent emergence of multidrug-resistant isolates has raised public health concerns. In this study, comparative genomics and phenotypic analysis were used to characterize 14 Salmonella Senftenberg clinical isolates recovered from multiple outbreaks in Shenzhen and Shanghai, China, between 2002 and 2011.

Classification by serotyping is the essential first step in the characterization of Salmonella isolates and is important for surveillance, source tracking, and outbreak detection. To improve detection and reduce the burden of salmonellosis, several rapid and high-throughput molecular Salmonella serotyping methods have been developed.

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The turkey industry relies totally on artificial insemination to continue and improve production. If something compromises the insemination process, such as contaminated semen, it becomes a detrimental loss to the industry. Bacteria have been found in broiler breeder males to reduce sperm motility. The Sperm Quality Index (SQI) is a quick method to determine avian sperm motility using the sperm quality analyzer (SQA).

A total of 192 Hy-Line Brown 40-week-old Salmonella-free layers were randomly assigned to 4 dietary treatments in a 5-wk experiment to test the efficacy of probiotics on egg production and quality, excreta and intestinal microbiota of laying birds challenged with Salmonella gallinarum. Dietary treatment comprised of (1) NC; basal diet, negative control, (2) PC; basal diet + oral S.

Salmonellosis is one of the major food-borne diseases in many countries. This study was carried out to determine the occurrence of Salmonella spp., Salmonella Enteritidis, and Salmonella Typhimurium in raw chicken meat from wet markets and hypermarkets in Selangor, as well as to determine the antibiotic susceptibility profile of S. Enteritidis and S. Typhimurium.