Listeria monocytogenes: challenges of microbiological control of food in Brazil

Costa, Paula Vasconcelos; Nascimento, Janaı́na dos Santos; Costa, Leonardo Emanuel de Oliveira; FERREIRA, Paula Bernadete de Moura; Brandão, Marcelo Luiz Lima

doi:10.1590/fst.08322

Cited by 1 publication

(1 citation statement)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Listeria monocytogenes is one of the pathogens that pose consistent risks to food safety and consumer's health (Vahidy et al, 1992;Costa et al, 2022). The bacterium has a peculiar life-cycle adaptation in which it is capable of saprophytic survival in the soil, but can transition to pathogenic life cycle upon entry in human or animal cells (Freitag et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Gamma radiation effects on the survival and reduction of Listeria monocytogenes on carrot and tomato

et al. 2022

View full text Add to dashboard Cite

Assessment of pathogen survival is important for food safety. Listeria monocytogenes causes significant produce and food contamination worldwide. The objective of this research was to assess survival and reduction of L. monocytogenes on postharvest carrot and tomato subjected to low-dose radiation at different storage temperatures and times. Radiation levels of 0, 0.25, 0.50, 0.75, and 1 kGy were applied on produce inoculated with L. monocytogenes. Gamma radiation reduced Listeria populations by 5.9 logs on carrot and 3.9 logs on tomato at 3 days of storage (5 °C), while reductions were 4.4 and 4.0 logs on carrot and tomato, respectively; at 7 storage days (5 °C). At 20 °C, Listeria reductions were 2.8 logs on carrot and 4.2 logs on tomato (3 storage days) and pathogen decreases were 2.2 logs on carrot and 2.9 logs on tomato (7 storage days). Although pathogen reductions by radiation treatment varied with storage temperatures and days, the linear decreases were significant as the dosage increased from 0.25 to 1.0 kGy, implying that treatments were efficacious for pathogen inactivation. As low dose gamma radiation (1 kGy) showed substantial reduction of Listeria monocytogenes on fresh carrot and tomato, thus, use of low dose low dose gamma radiation can improve the post-harvest safety of carrot and tomato.

show abstract

Section: Introductionmentioning

confidence: 99%