Research Publications (Food Safety)

Hepatitis A virus (HAV) was detected in frozen strawberries which had been implicated in a large outbreak of hepatitis A in 1997. The sample was analysed after over 20 years of storage, following a standard method not available at the time of the outbreak. This is the first study in which the HAV associated with the 1997 outbreak of foodborne hepatitis has finally been detected.

The long-term accumulation of pesticide residues brought a huge threat to healthy lives of animals and humans. However, traditional detection methods for pesticide residues required expensive equipment and tedious operation. An electrochemiluminescence (ECL) aptasensor based on nano-antimony tin oxide and titanium dioxide composites (ATO@TiO2) and silver nanoparticles (AgNPs) for rapid detection of malathion residues had been developed to solve the above problems.

The neomycin residues in milk could pose potential hazard for human health, and now, immunoassays are widely used for on-site screening of neomycin and other food contaminate residues. In this paper, the neomycin B was conjugated with carrier protein as immunogens, and a highly specific antibody was produced.

Mycotoxin exposure assessments through biomonitoring studies, based on the analysis of amniotic fluid, provides useful information about potential exposure of mothers and fetuses to ubiquitous toxic metabolites that are routinely found in food and the environment.

The Peruvian sea is one of the most productive ecosystems in the world. Phytoplankton production provides food for fish, mammals, mollusks and birds. This trophic network is affected by the presence of toxic phytoplankton species. In July 2017, samples of phytoplankton were obtained from Paracas Bay, an important zone for scallop (Argopecten purpuratus) aquaculture in Peru.

Tetrodotoxin (TTX)-producing bacteria have attracted great interest as a model system for study of the TTX biosynthetic route. Here, we report the complete genome of the TTX-producing bacterium Bacillus sp. 1839. The genome of the strain Bacillus sp. 1839, previously isolated from the TTX-bearing marine ribbon worm Cephalothrix cf. simula, was obtained using second generation Illumina and third generation nanopore sequencing technologies.

There is an increasing drug resistance of animal-derived pathogens, seriously posing a huge threat to the health of animals and humans. Traditional drug resistance testing methods are expensive, have low efficiency, and are time-consuming, making it difficult to evaluate overall drug resistance.

Due to the broad-spectrum antibiotic usage and empirical treatments, the pathogenic bacterium, Klebsiella pneumoniae, has shown extremely high detection rates at hospitals with an increasing antibiotic resistance. Therefore, rapid detection of the antibiotic resistance is urgently required and essential for effective treatments. In this study, we evaluated the performance of a newly developed method for ultra-rapid detection of antibiotic resistance in 30–60 min in K.

Objectives

Methylmercury metabolism was investigated in Pacific walruses (Odobenus rosmarus divergens) from St. Lawrence Island, Alaska, United States.

Methods

Clostridium perfringens is an opportunistic pathogenic bacterium that infects both animals and humans. Clostridium perfringens genomes encode a diverse array of toxins and virulence proteins, which continues to expand as more genomes are sequenced. In this study, the genomes of 44 C. perfringens strains isolated from intestinal sections of diseased cattle and from broiler chickens from diseased and healthy flocks were sequenced.

A loop-mediated isothermal amplification (LAMP) assay system was established, allowing rplD gene-based simultaneous detection of Campylobacter jejuni and Campylobacter coli in enriched meat products. Additionally, one-step differentiation of target species on agar plates was enabled by cdtC gene- and gyrA gene-based duplex LAMP. Both the rplD and cdtC–gyrA LAMP assays amplified the target sequences in all 62 C. jejuni and 27 C.

Author(s): Wentao Song, Jin Guo, Xiansheng Ni, Jingwen Wu, Wen Xia, Fenglan He, Xi Wang, Guoyin Fan, Kun Zhou, Yuhang Wu, Shengen Chen, Haiying Chen

Author(s): Paula Alvito, Elsa Vasco, Ricardo Assunção

Author(s): Guan-Wen Chen, Yi-An Chen, Hsin-Yi Chang, Tsui-Chin Huang, Tai-Yuan Chen

Author(s): Haojie Ge, Kai Zhang, Dan Gu, Xiang Chen, Xin Wang, Guiqin Li, Hongji Zhu, Yingyan Chang, Ge Zhao, Zhiming Pan, Xin’an Jiao, Maozhi Hu

Author(s): Vera Lavelli

Background
The “linear” manufacturing processes generate waste materials and products that after their use end up in landfills and incinerators. Circular supply chains implement one of the basic concepts of the bioeconomy, i.e., collecting waste streams in order to recycle them into new products, thus achieving a more sustainable production system.

Author(s): Tengkai Wang, Fen Xu, Lijun Song, Juan Li, Qian Wang

Author(s): Marta Mesias, Cristina Delgado-Andrade, Francisca Holgado, Lucía González-Mulero, Francisco J. Morales

Author(s): Ping Zeng, Lanhua Yi, Qipeng Cheng, Jun Liu, Sheng Chen, Kin-Fai Chan, Kwok-Yin Wong

Author(s): Marlen Petersen, Luyao Ma, Xiaonan Lu

Author(s): Tayebe Azizi, Mohsen Daneshyar, Manoochehr Allymehr, Ali Shalizar Jalali, Hamed Khalilvandi Behroozyar, Amir Tukmechi

Author(s): Hend Ali Elshebrawy, Mahmoud Ahmed Mahros, Samir Mohammed Abd-Elghany, Mohammed Mohammed Elgazzar, Hideki Hayashidani, Khalid Ibrahim Sallam

Lanthanum (La), calcium (Ca), and cadmium (Cd) have similar physical and chemical properties because of their similar ionic radius. Although the interactions between La, Ca, and Cd have been frequently reported in plants, few studies have investigated the interactive effects of La and Ca on the growth and Cd accumulation in plants. Therefore, we investigated the interactive effects of La and Ca on the growth and Cd accumulation in wheat under Cd exposure by a hydroponic experiment.

Bacteriocins have become biological weapons against harmful food pathogens and have attracted interest as tools for biopreservation. The aim of this study was to isolate, identify and characterize lactic acid bacterial (LAB) strains from cheese samples, partially purify potential bacteriocins and characterize their antimicrobial activity against pathogens. Bacteriocin-producing organisms were screened by Agar spot assay test.

Members of the bacterial genus Vibrio utilize chitin both as a metabolic substrate and a signal to activate natural competence.