Research Publications (Food Safety)

Abstract

Aims

Given the significance of Salmonella enterica to both human and animal health, and a recent global dissemination of Salmonella 4,[5],12:i:‐, changes in the prevalent serovars and antimicrobial resistance in clinical isolates of Salmonella from cattle and pigs were investigated in Japan.

Natural microcin J25 (MccJ25) represent promising alternatives to traditional antibiotics for the treatment of drug-resistant infections. However, little is known about the antibacterial activity of recombinant MccJ25 against foodborne pathogens. Here, the activity of recombinant MccJ25 was examined using a matrix of conditions in order to assess the efficacy of recombinant MccJ25 as a mitigation against foodborne pathogens, Salmonella species and Escherichia coli (E. coli) O157.

Available online 20 August 2019

Author(s): Samet Ozturk, Fanbin Kong, Rakesh K. Singh

Salmonella enterica serovar Typhimurium (S. Typhimurium) induces inflammatory changes in the ceca of streptomycin-pretreated mice. In this mouse model of colitis, the type III secretion system 1 (T3SS-1) has been shown to induce rapid inflammatory change in the cecum at early points, 10 to 24 h after infection. Five proteins, SipA, SopA, SopB, SopD, and SopE2, have been identified as effectors involved in eliciting intestinal inflammation within this time range.

In recent years nontyphoidal Salmonella has emerged as one of the pathogens most frequently isolated from the bloodstream in humans. Only a small group of Salmonella serovars cause this systemic infection, known as invasive nontyphoidal salmonellosis. Here, we present a focused minireview on Salmonella enterica serovar Panama, a serovar responsible for invasive salmonellosis worldwide. S.

This study investigated the microbial dynamics in multispecies biofilms of Escherichia coli O157:H7 strain 1934 (O157) or Salmonella enterica serovar Typhimurium ATCC 14028 (ST) and 40 strains of meat processing surface bacteria (MPB). Biofilms of O157 or ST with/without MPB were developed on stainless steel coupons at 15°C for up to 6 days. Bacteria in suspensions (inoculum, days 2 and 6) and biofilms (days 2 and 6) were enumerated by plating.

The objectives of this study were to investigate the prevalence and fluoroquinolone resistant Salmonella isolated from an integrated broiler chicken supply chain and their molecular characterization. In total, 73 Salmonella isolates were recovered from a broiler chicken supply chain in Shanghai. Salmonella isolates were tested for susceptibility to 11 antimicrobial agents using the broth dilution method and were characterized using pulsed-field gel electrophoresis (PFGE).

Available online 10 August 2019

Author(s): Hamid Reza Sodagari, Arkan Baraa Mohammed, Penghao Wang, Mark O'Dea, Sam Abraham, Ian Robertson, Ihab Habib

Publication date: January 2020

, Volume 107

Author(s): Xinfeng Han, Junfeng Peng, Xingai Guan, Jiakang Li, Xuelin Huang, Shuliang Liu, Yiping Wen, Qin Zhao, Xiaobo Huang, Qigui Yan, Yong Huang, Sanjie Cao, Rui Wu, Xiaoping Ma, Likou Zou

Available online 6 August 2019

Author(s): Camila Gadotti, Fereidoun Forghani, Francisco Diez-Gonzalez

Salmonella enterica is regarded as a major public health threat worldwide. Salmonella secretes the novel translocated effector protein K2 (SseK2), but it is unclear whether this protein plays a significant role i...

Abstract

Aims

This work aimed to evaluate the antimicrobial activity of pure (ZnO) and doped (ZnMgO) zinc oxide nanoparticles on bacterial pathogens and Saccharomyces cerevisiae to confirm their applicability as an alternative to antibiotics and to estimate their biocompatibility.

Abstract

Abstract

Salmonella enterica serovar Heidelberg is currently the 12th most common serovar of Salmonella enterica causing salmonellosis in the United States and results in twice the average incidence of blood infections caused by nontyphoidal salmonellae. Multiple outbreaks of salmonellosis caused by Salmonella Heidelberg resulted from the same poultry processor, which infected 634 people during 2013 and 2014. The hospitalization and invasive illness rates were 38% and 15%, respectively.

Publication date: Available online 29 July 2019

Source: LWT

Author(s): Alex Tsun Yin Lau, Shai Barbut, Kelly Ross, Moussa Sory Diarra, S. Balamurugan

Publication date: Available online 30 July 2019

Source: LWT

Author(s): Sang-Soon Kim, Minjung Shin, Jun-Won Kang, Do-Kyun Kim, Dong-Hyun Kang

Available online 27 July 2019

Author(s): Sinem Acar, Ece Bulut, Matthew J. Stasiewicz, Yeşim Soyer

Nicole Lau, Amanda L. Haeberle, Brittany J. O’Keeffe, Eleanor A. Latomanski, Jean Celli, Hayley J. Newton, Leigh A. Knodler

This study determined the prevalence, pulsed-field gel electrophoresis profiles, and antimicrobial resistance profile of Listeria monocytogenes, Salmonella enterica, and Escherichia coli O157:H7 isolates from dairy cattle farms in Jordan. Samples from bulk tank milk (n = 305), cattle feces (n = 610), and rectoanal mucosal swabs (n = 610) were collected from 61 dairy cattle farms. We confirmed 32 L. monocytogenes, 28 S. enterica, and 24 E. coli O157:H7 isolates from the samples.

Salmonella enterica serovar Typhimurium, a Gram-negative bacterium, can cause infectious diseases ranging from gastroenteritis to systemic dissemination and infection. However, the molecular mechanisms underlying this bacterial dissemination have yet to be elucidated. A study indicated that using the lipopolysaccharide (LPS) core as a ligand, S.

Clostridium difficile disease is mediated primarily by toxins A and B (TcdA and TcdB, respectively). The receptor binding domains (RBD) of TcdA and TcdB are immunogenic, and anti-RBD antibodies are protective. Since these toxins act locally, an optimal C. difficile vaccine would generate both systemic and mucosal responses. We have repurposed an attenuated Salmonella enterica serovar Typhimurium strain (YS1646) to produce such a vaccine.