Research Publications (Food Safety)

Letters in Applied Microbiology, Accepted Article. In order to develop a mechanistic bacterial dose-response model, based on the concept of Key Events Dose-Response Framework (KEDRF), this study aimed to investigate the invasion of intestinal model cells (Caco-2) by Salmonella Typhimurium and Listeria monocytogenes and described the behavior of both pathogens as a mathematical model using Bayesian inference.

Letters in Applied Microbiology, Accepted Article. Listeria monocytogenes is a typical foodborne pathogen that causes hard-to-treat bacterial infections, mainly due to its ability to form biofilm and enter into a viable but non-culturable state (VBNC). In this study, we investigated the removal effects of four antimicrobial agents on L.

Letters in Applied Microbiology, Accepted Article. We evaluated combined effects of vacuumed hydrogen peroxide vapor (VHPV) and vacuum-sealed dry heat (vacuum heat, VH) to inactivate foodborne pathogens (Salmonella Typhimurium, Escherichia coli O157:H7, and Listeria monocytogenes) on alfalfa seeds.

Letters in Applied Microbiology, EarlyView.

Letters in Applied Microbiology, Accepted Article.

Letters in Applied Microbiology, Accepted Article. This study was to investigate the synergistic antibacterial effect and inhibition of biofilm formation of nisin in combination with terpenes (carvacrol, cinnamaldehyde, citral, and thymol) against Listeria monocytogenes. The bactericidal ranking of terpenes combined with nisin was carvacrol > cinnamaldehyde, citral > thymol.

Letters in Applied Microbiology, Accepted Article. In this study we investigated the incidence of Listeria monocytogenes in the receiving meat, the meat products, the personnel and the environment of a vertically integrated company in Northern Greece owing a processing plant and three trading facilities.

Letters in Applied Microbiology, Accepted Article. The antibacterial activity of a Cinnamomum essential oil and of its main component trans‐cinnamaldehyde (90% w/w) was examined against 5 Listeria monocytogenes strains. The minimal inhibitory concentrations (MIC) of C. cassia essential oil against the 5 L. monocytogenes strains were identical (250 µg.mL‐1) while the minimal bactericidal concentrations (MBC) ranged between 800 and 1200 µg.mL‐1.

Listeria monocytogenes is an opportunistic pathogen with the ability to adapt to different environmental conditions, resulting in safety issues for food producers. Foods contaminated by L. monocytogenes can represent a risk if consumed by susceptible individuals such as elderly, pregnant women and the immunocompromised. The aim of this study was to evaluate the genetic diversity of a collection of L. monocytogenes isolated from different matrices in Brazil during the period of 1979‐2015.

Listeria monocytogenes, a well‐known foodborne pathogen and the causative agent of listeriosis, has the ability to persist in food processing environments due to its high adhesion ability in different surfaces, playing an important role in the food industry. The aim of this study was to assess how the main stressing conditions, usually observed in meat processing facilities (sanitizers, NaCl, curing salts), interfere in L. monocytogenes adhesion and biofilm formation.

The aim of this study was to examine whether the process of initial colonization and the formation of mature biofilm structure of foodborne bacterial pathogens Listeria monocytogenes and Salmonella typhimurium can be impeded by active essential oil components β‐caryophyllene, cinnamaldehyde and eugenol at their individual and combined effects.

The sugar glider (Petaurus breviceps) is a small, arboreal, nocturnal, gliding mammalian possum belonging to the marsupial infraclass. Exotic marsupials, including sugar gliders, are becoming popular companion pets and, consequently, the risk of potential infections that can be transmitted to humans should be investigated. Data on the role of the sugar glider as a possible carrier of pathogenic and zoonotic bacteria are scarce and fragmentary.

Four cases of listeriosis in a hospital (A) in New Zealand were identified in 2012. Pulsed‐field gel electrophoresis used at the time identified four pulsotypes amongst the clinical isolates. Two of the pulsotypes matched to L. monocytogenes isolates obtained from ready‐to‐eat (RTE) meat samples from a RTE producer tested during a nationwide microbiological survey the month prior.

Significance and Impact of the Study: Treated wastewater effluent contains Listeria monocytogenes which survives conventional wastewater treatment processes and can re‐enter human food chain, thus it is imperative to detect L.  monocytogenes using a rapid and an inexpensive method.

Significance and Impact of the Study: The ability to predict the growth and survival of Listeria monocytogenes in contaminated RTE foods is essential for listeriosis risk assessment. The results of this study provided valuable information on the kinetic parameters of survival of some L. monocytogenes strains found within the South African food environment.

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