Research Publications (Food Safety)

Kramer, B. et al. The objective of this study was the determination of the efficiency of pulsed light (PL) treatments for the decontamination of endive salad and mung bean sprouts, as well as the assessment of quality changes in relation to discoloration and alteration of respiration activity. Produce samples were artificially inoculated with two bacterial test strains Escherichia coli (DSM 498) and Listeria innocua (DSM 20649) and exposed to PL at different energy doses.

Syne, Stacey-Marie et al. A total of 480 samples of locally produced processed meats, including chicken franks, chicken bologna, and bacon from brands A and B, was collected from 8 supermarkets across the island of Trinidad over a 1-year period and subjected to a range of microbiological analyses. The results showed that 54.2, 0.4, and 1.7% of the samples exceeded recommended limits for aerobic bacteria, Escherichia coli and Staphylococcus aureus, respectively. Listeria spp.

Brar, Pardeepinder K. et al. Cocktails of lawn-collected cells were used to determine the survival of Salmonella, Escherichia coli O157:H7, and Listeria monocytogenes on the surface of raw peanut and pecan kernels. Kernels were inoculated with mixtures of four to five strains at 3 or 6 log CFU/g, dried at room temperature, and then stored at −24 ± 1, 4 ± 2, and 22 ± 1°C for 28 or 365 days.

Hadjilouka, Agni et al. The aims of the present study were to determine the prevalence and levels of Listeria monocytogenes and Escherichia coli O157:H7 in rocket and cucumber samples by deterministic (estimation of a single value) and stochastic (estimation of a range of values) approaches.

Erickson, Marilyn C. et al. Salmonella is a microorganism of concern on a global basis for raw shrimp. This research modeled the impact of vapor thymol concentration (0, 0.8, and 1.6 mg/liter), storage temperature (8, 12, and 16°C), and modified atmosphere condition (0.04 as in the natural atmosphere and 59.5% CO2) against the growth behavior of a Salmonella cocktail (six strains) on raw shrimp.

Zhou, Siyuan et al. Salmonella is a microorganism of concern on a global basis for raw shrimp. This research modeled the impact of vapor thymol concentration (0, 0.8, and 1.6 mg/liter), storage temperature (8, 12, and 16°C), and modified atmosphere condition (0.04 as in the natural atmosphere and 59.5% CO2) against the growth behavior of a Salmonella cocktail (six strains) on raw shrimp.

Lublin, Avishai et al. Contaminated table eggs are considered a primary source of foodborne salmonellosis globally. Recently, a single clone of Salmonella enterica serovar Infantis emerged in Israel and became the predominant serovar isolated in poultry. This clone is currently the most prevalent strain in poultry and is the leading cause of salmonellosis in humans.

Smith, Danielle F. et al. Salmonella is able to survive in low-moisture environments and is known to be more heat resistant as product water activity (aw) decreases. However, it is unknown how rapidly the resistance changes if product aw is altered rapidly, as can occur in certain processes. Therefore, the objective was to determine the effect of rapid product desiccation or hydration on Salmonella thermal resistance.

Koohmaraie, Mohammad et al. The contamination of raw ground beef by Escherichia coli O157:H7 is not only a public health issue but also an economic concern to meat processors. When E. coli O157:H7 is detected in a ground beef sample, the product lots made immediately before and after the lot represented by the positive sample are discarded or diverted to lethality treatment. However, there is little data to base decisions on how much product must be diverted.

Narváez-Bravo, Claudia et al. The objective of the study was to characterize virulence genes and subtype Escherichia coli O157:H7 and O157:H(−) isolates obtained from a vertically integrated feedlot slaughter plant in Mexico. A total of 1,695 samples were collected from feedlots, holding pens, colon contents, hides, and carcasses. E.

The development of analytical methods to detect aflatoxin B1 (AFB1) in foodstuffs and its metabolites in human biological samples is useful for risk assessment. The latter methodology, i.e. the measurement of AFB1 biomarkers, has become important to assess human aflatoxin exposure.

In the presented study, the content of lead in rainbow trout (Oncorhynchus mykiss) samples was examined. Rainbow trout were purchased in Prague (Czech Republic), Lodz (Poland) and Bratislava (Slovakia) from local fish shops and supermarkets belonging to popular chain stores. First, method for quantitative lead determination was developed with very good results (R

Publication date: August 2015
, Volume 54
Author(s): Qixiao Zhai , Ruijie Yin , Leilei Yu , Gang Wang , Fengwei Tian , Ruipeng Yu , Jianxin Zhao , Xiaoming Liu , Yong Q. Chen , Hao Zhang , Wei Chen

Publication date: August 2015
, Volume 54
Author(s): Irina Rozentāle , Ilze Stumpe-Vīksna , Dzintars Začs , Inese Siksna , Aija Melngaile , Vadims Bartkevičs

Publication date: August 2015
, Volume 54
Author(s): Yeli Luo , Jingyue Xu , Ying Li , Hanting Gao , Jiajia Guo , Fei Shen , Chunyan Sun

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

Publication date: 4 May 2015
, Volume 200
Author(s): Noor-Azira Abdul-Mutalib , Syafinaz Amin Nordin , Malina Osman , Natsumi Ishida , Kosuke Tashiro , Kenji Sakai , Yukihiro Tashiro , Toshinari Maeda , Yoshihito Shirai

Flagella are multiprotein complexes necessary for swimming and swarming motility. In Salmonella enterica serovar Typhimurium, flagella-mediated motility is repressed by the PhoP/PhoQ regulatory system. We now report that Salmonella can move on 0.3% agarose media in a flagella-independent manner when experiencing the PhoP/PhoQ-inducing signal low Mg2+. This motility requires the...

The objective of this study was to establish quantitative evaluation models for fish microbiological quality analysis based on electronic tongue technique coupled with nonlinear pattern recognition algorithms. Crucian carp stored at 4C were used. A commercial electronic tongue system was employed. The total viable counts (TVCs) of fish samples were measured by the classical microbiological plating method.

This study was conducted to confirm the synergistic inactivation effect of flower pollen when applied with heat treatment to Escherichia coli O157:H7. The reduction of the number of E. coli O157:H7 was monitored during heat treatment at 55, 57.5, 60, 62.5 and 65C.

Publication date: July 2015
, Volume 53
Author(s): Maurício S. Oliveira , Andressa C.L. Diel , Ricardo H. Rauber , Fabiana P. Fontoura , Adriano Mallmann , Paulo Dilkin , Carlos A. Mallmann