Research Publications (Food Safety)

Publication date: 30 July 2019

, Volume 287

Author(s): Branislav Šojić, Branimir Pavlić, Vladimir Tomović, Predrag Ikonić, Zoran Zeković, Sunčica Kocić-Tanackov, Saša Đurović, Snežana Škaljac, Marija Jokanović, Maja Ivić

Publication date: 30 July 2019

, Volume 287

Author(s): Qingyang Wang, Wai Fun Leong, Ryan J. Elias, Rohan V. Tikekar

Publication date: 30 July 2019

, Volume 287

Author(s): Nan Wang, Chunfeng Duan, Xuhui Geng, Shenghong Li, Kun Ding, Yafeng Guan

Publication date: 30 July 2019

, Volume 287

Author(s): Chenmeng Zhang, Tingting You, Nan Yang, Yukun Gao, Li Jiang, Penggang Yin

Publication date: 30 July 2019

, Volume 287

Author(s): Ana Gluvić, Nataša Poklar Ulrih

Available online 4 March 2019

Author(s): Andrés J. Rascón, Abdelmonaim Azzouz, Evaristo Ballesteros

Available online 5 March 2019

Author(s): Zhuo Zhang, Chen Zeng, Bangzhu Peng

Available online 5 March 2019

Author(s): Lin Zhao, Mitchie Yiqi Zhao, Chin Ping Phey, Hongshun Yang

Available online 5 March 2019

Author(s): Jinru Zhou, Yanbo Wang, Yifan Qian, Teng Zhang, Lei Zheng, Linglin Fu

Available online 6 March 2019

Author(s): T.R. Murefu, L. Macheka, R. Musundire, F.A. Manditsera

Abstract

Seasoning powder is a form of flavor enhancer, which is commonly prepared from various kinds of meat, fish, and vegetables. The main purpose of this research work is to produce natural seasoning powder instead of mono sodium glutamate (MSG) to reduce health problem.

Efficient microbial conversion of lignocellulose into valuable products is often hindered by the presence of furfural, a dehydration product of pentoses in hemicellulose sugar syrups derived from woody biomass. For a cost-effective lignocellulose microbial conversion, robust biocatalysts are needed that can tolerate toxic inhibitors while maintaining optimal metabolic activities.

We developed a multiplex PCR method based on multiple-locus variable-number tandem-repeat (VNTR) analysis (MLVA) that was designed for the rapid typing of Escherichia coli and Shigella isolates. The method amplifies seven VNTRs and does not require a sequencing capillary or fluorescent dyes. The amplification products are simply loaded on a standard agarose gel for electrophoresis, and the banding patterns are analyzed visually.

Atypical enteropathogenic Escherichia coli (aEPEC) strains (36 Japanese and 50 Bangladeshi) obtained from 649 poultry fecal samples were analyzed by molecular epidemiological methods. Clermont’s phylogenetic typing showed that group A was more prevalent (58%, 50/86) than B1 (31%, 27/86). Intimin type β1, which is prevalent among human diarrheal patients, was predominant in both phylogroups B1 (81%, 22/27) and A (70%, 35/50).

Klebsiella pneumoniae is a leading cause of severe infections in humans and dairy cows, and these infections are rapidly becoming untreatable due to the emergence of multidrug-resistant (MDR) strains. However, little is known about the relationship between bovine and human K. pneumoniae isolates at the genome population level. Here, we investigated the genomic structures, pangenomic profiles, virulence determinants, and resistomes of 308 K.

Aspergillus flavus is an opportunistic fungal plant and human pathogen and a producer of mycotoxins, including aflatoxin B1 (AFB1). As part of our ongoing studies to elucidate the biological functions of the A. flavus rtfA gene, we examined its role in the pathogenicity of both plant and animal model systems.

In this study, we examined the change in resistance of Salmonella enterica serovar Typhimurium and Escherichia coli O157:H7 to 222-nm krypton-chlorine (KrCl) excilamp treatment as influenced by acid adaptation and identified a mechanism of resistance change. In addition, we measured changes in apple juice quality indicators, such as color, total phenols, and 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging activity, during treatment.

Abstract

Nikola Popović, Jelena Djokić, Emilija Brdarić, Miroslav Dinić, Amarela Terzić-Vidojević, Nataša Golić, Katarina Veljović Listeria monocytogenes, the common foodborne pathogenic bacteria species, compromises the intestinal epithelial barrier, leading to development of the listeriosis, a severe disease especially among immunocompromised individuals. L.

Publication date: Available online 3 March 2019

Source: LWT

Author(s): Marilyn C. Erickson, Jye-Yin Liao

This study was conducted to analyze the antibacterial effect of olive oil polyphenol extract (OOPE) against vegetative cells of Bacillus cereus isolated from raw milk and reveal the possible antibacterial mechanism. The diameter of inhibition zone, minimum inhibitory concentration, minimum bactericidal concentration, and survival counts of bacterial cells in sterile normal saline and pasteurized milk were used to evaluate the antibacterial activity of OOPE against B. cereus vegetative cells.

Intoxication by staphylococcal enterotoxins (SE) is among the most common causes of food-poisoning outbreaks resulting from the consumption of raw milk or products made thereof. The aim of our study was to analyze the thermal stability of SE and evaluate the inactivation of SE types A, B, and C (SEA, SEB, SEC) by autoclaving at 100°C, 110°C, and 121°C.

Bovine mastitis is the most frequently reported disease among dairy cows worldwide. Treatment of udder disease often involves the use of antimicrobial substances, which is difficult to justify with respect to their possible effect on the development and spread of antimicrobial resistance. Prevention of udder disease is therefore always preferable to treatment.

Abstract

Aims

The aim of this study was to evaluate the genetic diversity and resistance phenotypes of Listeria monocytogenes strains isolated from clinical encephalitis cases, and compare this population to isolates derived from tank milk of healthy animals.