Effect of Dielectric Barrier Discharge Plasma against Listeria monocytogenes Mixed-Culture Biofilms on Food-Contact Surfaces

Autor: Min Gyu Song, Pantu Kumar Roy, Eun Bi Jeon, So Hee Kim, Min Soo Heu, Jung-Suck Lee, Jae-Suk Choi, Jin-Soo Kim, Shin Young Park
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Antibiotics, Vol 12, Iss 3, p 609 (2023)
Druh dokumentu: article
ISSN: 2079-6382
DOI: 10.3390/antibiotics12030609
Popis: Listeria monocytogenes is a major foodborne pathogen. Various methods can be used to control biofilms formed by foodborne pathogens. Recently, the food industry has become interested in plasma, which can be used as a non-thermal technology with minimum changes to product quality. In this study, the effects of dielectric barrier discharge (DBD) plasma on L. monocytogenes mixed-culture biofilms formed on stainless steel (SS), latex hand glove (HG), and silicone rubber (SR) were investigated. DBD plasma effectuated reductions of 0.11–1.14, 0.28–1.27 and 0.37–1.55 log CFU/cm2, respectively. Field emission scanning electron microscopy (FE-SEM) demonstrated that DBD plasma cuts off intercellular contact and induces cell decomposition to prevent the development of biological membranes. It was confirmed that the formed biofilms collapsed and separated into individual bacteria. Our findings suggest that DBD plasma can be used as an alternative non-heating sterilization technology in the food industry to reduce biofilm formation on bacterial targets.
Databáze: Directory of Open Access Journals